CAN COMMUNICATION SYSTEM(for LHD) DIAGNOSIS SYSTEM

ECUS OR SENSORS WHICH COMMUNICATE THROUGH CAN COMMUNICATION SYSTEM
1. V Bus
  1. ECM
  2. Skid control ECU (brake actuator assembly)
  3. Power steering ECU assembly
  4. Main body ECU (multiplex network body ECU)
  5. Air conditioning amplifier assembly
  6. Certification ECU (smart key ECU assembly)
  7. Navigation receiver assembly*1
  8. Radio and display receiver assembly*2
  9. Steering sensor
  10. Clearance warning ECU assembly
  11. Airbag ECU assembly
  12. Parking brake ECU assembly
  13. Combination meter assembly
  14. Network gateway ECU*3
  15. Option connector (bus buffer ECU)*4
    - *1: for Navigation Receiver Type
      
      *2: for Radio and Display Type
      
      *3: w/ Network Gateway ECU
      
      *4: w/o Network Gateway ECU
2. Sub Bus 1
  1. Main body ECU (multiplex network body ECU)
  2. Room light control relay
  3. Headlight light control ECU sub-assembly LH
  4. Front power seat switch LH
  5. Outer mirror control ECU assembly (for driver side)
  6. Outer mirror control ECU assembly (for front passenger side)
  7. Slide door motor unit LH
  8. Slide door motor unit RH
  9. Back door motor unit
3. Sub Bus 2*1
  1. Network gateway ECU
  2. Inner rear view mirror assembly*2
  3. Parking assist ECU*3
  4. Telematics transceiver*4
    - *1: w/ Network Gateway ECU
      
      *2: w/ Automatic High Beam System
      
      *3: w/ Panoramic View Monitor System
      
      *4: w/ Manual (SOS) Switch

CHECK FOR INSTALLED SYSTEMS (ECUS AND SENSORS) THAT ADOPT CAN COMMUNICATION

The systems (ECUs and sensors) that adopt CAN communication vary depending on the vehicle and optional equipment. Check which systems (ECUs and sensors) are installed to the vehicle.

ECU/Sensor Name	GTS Display	Applicability
ECM	ECM (Engine)	Installed on all vehicles
Skid control ECU (brake actuator assembly)	Skid Control (ABS/VSC/TRAC)	Installed on all vehicles
Power steering ECU assembly	Power Steering (EPS)	Installed on all vehicles
Main body ECU (multiplex network body ECU)	Main Body	Installed on all vehicles
Air conditioning amplifier assembly	Air Conditioning Amplifier	Installed on all vehicles
Certification ECU (smart key ECU assembly)	Certification (Smart)	Installed on all vehicles
Navigation receiver assembly	Display and Navigation (AVN1)	Vehicles with navigation receiver type
Radio and display receiver assembly	Display and Navigation (AVN1)	Vehicles with radio and display type
Steering sensor	Spiral cable (Steering Angle Sensor)	Installed on all vehicles
Clearance warning ECU assembly	Clearance Warning (Clearance Sonar2)	Installed on all vehicles
Airbag ECU assembly	Airbag	Installed on all vehicles
Parking brake ECU assembly	Electric Parking Brake	Installed on all vehicles
Combination meter assembly	Combination Meter	Installed on all vehicles
Network gateway ECU	CAN Gateway1	Vehicles with network gateway ECU
Option connector (bus buffer ECU)	Accessory Gateway	Vehicles without network gateway ECU
Room light control relay	ILLUMINATION	Installed on all vehicles
Headlight light control ECU sub-assembly LH	Headlight swivel (AFS)	Installed on all vehicles
Front power seat switch LH	D-Seat	Installed on all vehicles
Outer mirror control ECU assembly (for driver side)	Front Door LH (FL-Door2)	Installed on all vehicles
Outer mirror control ECU assembly (for front passenger side)	Front Door RH (FR-Door2)	Installed on all vehicles
Slide door motor unit LH	Rear Door LH (RL-Door)	Installed on all vehicles
Slide door motor unit RH	Rear Door RH (RR-Door)	Installed on all vehicles
Back door motor unit	Back Door	Installed on all vehicles
Inner rear view mirror assembly	Front Camera Module	Vehicles with automatic high beam system
Parking assist ECU	Panoramic View Monitor	Vehicles with panoramic view monitor system
Telematics transceiver	DCM	Vehicles with manual (SOS) switch

Tech Tips

The names of ECUs and sensors shown on the GTS display may differ from those shown in the DTC Table by ECU section.

CAN BUS CHECK

Tech Tips

The ECUs and sensors that are properly connected to the CAN communication system can be displayed using the GTS.

Using the GTS, select the CAN Bus Check screen.

Note

It may be possible to select buses that do not have ECUs or sensors from the bus selection pull-down menu. This is not a malfunction. (This occurs when optional devices are not on a sub bus that is monitored by a gateway function equipped ECU.)
In the bus selection pull down menu, all buses applicable to the model are displayed (e.g. LIN communication buses are also displayed). Therefore, refer to the wiring diagrams to check the names of sub buses for CAN communication.

Click here

Tech Tips

Different connection statuses are indicated by the background color of ECUs and sensors that are displayed.

Explanation of CAN Bus Check Screen
Bus Type	Background Color	Connection Status
V Bus	White	Communication has been normal since the start of the CAN bus check.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Communication was established at least once since the start of the CAN bus check, but communication is currently not occurring (unstable communication).
	Not displayed	Communication stop has continued since the start of the CAN bus check.*1
Sub Bus (gateway function equipped ECU that does not have history of connected ECUs)*2	White	Communication has been normal since the start of the CAN bus check.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Communication was established at least once since the start of the CAN bus check, but communication is currently not occurring (unstable communication).
	Not displayed	Communication stop has continued since the start of the CAN bus check.*1
Sub Bus (gateway function equipped ECU that has history of connected ECUs)*3	White	Communication has been normal since the start of the CAN bus check.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Currently not communicating (either of the following): Communication stop has continued since the start of the CAN bus check. Communication was established at least once since the start of the CAN bus check, but communication is currently not occurring.
	Not displayed	Either of the following: If a gateway function equipped ECU cannot communicate, the sub bus and ECUs connected to the sub bus will not be displayed. If no ECUs are connected to the sub bus, "There is no system found on the Communication Bus" will be displayed.

Tech Tips

Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.
*1: ECUs that are present in the vehicle but are not displayed on the CAN Bus Check screen.
*2: Gateway function equipped ECU that does not memorize the sub bus ECUs that are connected to it.
*3: Gateway function equipped ECU that memorizes the sub bus ECUs that are connected to it.
If none of the connected ECUs are displayed, or there is no response from the vehicle to the GTS, check the DLC3 branch and the V bus main bus lines for a malfunction.

Observe the connection response screen for approximately 2 minutes to check for a change in connection status of the connected ECUs and sensors.
Tech Tips
- If an open occurs in one of the lines of a CAN branch (except DLC3), output from the other branch line (the line that is not open) will be unstable and it may interfere with the response (display) of other ECUs and sensors.
- If the connection status changes during the inspection, repair the open in the branch line of the ECU or sensor that does not respond (is not detected) and then perform the CAN bus check again.

HOW TO INTERPRET CAN BUS CHECK SCREEN

When a communication stop is currently occurring, the probable malfunctioning part can be determined from the CAN bus check and by using the following methods.

Note

The following CAN bus wiring diagram is provided only as an example. This wiring diagram is different from the actual wiring diagram for this vehicle.
Tech Tips
- When a communication stop is currently occurring, it is easier to determine the probable malfunctioning part from the CAN bus check rather than from communication DTCs.
- Wait for approximately 2 minutes after turning the engine switch on (IG) (or simulate the driving conditions that enable the malfunction to be reproduced) and select "CAN Bus Check". Then observe the communication status of each ECU on the screen.

If a communication error of only 1 ECU or sensor is indicated on the CAN Bus Check screen, a communication stop of the ECU or sensor is suspected.

Example: Open in both CAN branch lines of ECU B on the V bus

*a	V Bus	*b	Sub Bus
*c	Terminating Resistor	*d	Location of Malfunction
*e	Not displayed or background color changes to red or yellow	*f	CAN Bus Check Screen

Tech Tips

When there are communication stops, ECUs that are present in the vehicle may not be displayed on the CAN Bus Check screen.

*a	Background color periodically changes to yellow or red
*b	Not displayed or background color is yellow or red
*c	Not displayed

If communication errors for multiple ECUs or sensors are indicated on the CAN Bus Check screen, then a communication stop of the ECU or sensor that shows a more serious communication stop (an ECU or sensor which is not displayed) is suspected.

Example: Open in a CAN branch line for ECU D on the V bus

Explanation of CAN Bus Check Screen
Bus Type	Background Color	Connection Status
V Bus	White	Communication has been normal since the start of the CAN bus check.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Communication was established at least once since the start of the CAN bus check, but communication is currently not occurring (unstable communication).
	Not displayed	Communication stop has continued since the start of the CAN bus check.*1
Sub Bus (gateway function equipped ECU that does not have history of connected ECUs)*2	White	Communication has been normal since the start of the CAN bus check.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Communication was established at least once since the start of the CAN bus check, but communication is currently not occurring (unstable communication).
	Not displayed	Communication stop has continued since the start of the CAN bus check.*1
Sub Bus (gateway function equipped ECU that has history of connected ECUs)*3	White	Communication has been normal since the start of the CAN bus check.
	Yellow	Communication stop occurred at least once since the start of the CAN bus check, but communication is currently occurring (unstable communication).
	Red	Currently not communicating (either of the following): Communication stop has continued since the start of the CAN bus check. Communication was established at least once since the start of the CAN bus check, but communication is currently not occurring.
	Not displayed	Either of the following: If a gateway function equipped ECU cannot communicate, the sub bus and ECUs connected to the sub bus will not be displayed. If no ECUs are connected to the sub bus, "There is no system found on the Communication Bus" will be displayed.

Tech Tips

Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.
*1: ECUs that are present in the vehicle but are not displayed on the CAN Bus Check screen.
*2: Gateway function equipped ECU that does not memorize the sub bus ECUs that are connected to it.
*3: Gateway function equipped ECU that memorizes the sub bus ECUs that are connected to it.
The example of the CAN Bus Check screen in the illustration shows the result of electrical noise on the CAN bus which is caused by an open in a CAN branch line of ECU D (output from the other branch line is unstable) and the communication of ECU C is also unstable. In addition, in this example, ECU C is equipped with a gateway function. Therefore, communication is also unstable between the sub bus ECUs of ECU C and the V bus.
The example in the illustration shows that ECU D is not displayed on the CAN Bus Check screen. This indicates a more significant communication stop. In this case, a communication stop of ECU D is suspected.

*a Not displayed or background color changes to red

If a communication error is indicated on both the V bus and sub bus on the CAN Bus Check screen, suspect any communication stop displayed for the V bus first.

Example: Open in both CAN branch lines of ECU C on the V bus
Tech Tips
- In the CAN bus check, it is possible to confirm the communication status of ECUs connected to the V bus after connecting the GTS to the DLC3. As for sub buses, it is possible to confirm which sub bus connected ECUs can communicate with a gateway function equipped ECU on the V bus.
- If a gateway function equipped ECU has a communication error, ECUs connected to the gateway function equipped ECU are also affected, and communication stops will be indicated.
- The CAN Bus Check screen in the illustration shows that ECU C has a gateway function and a communication stop in ECU C is suspected.
*a Background color changes to red

If the CAN Bus Check screen indicates a communication stop only in the sub bus, a communication stop in the sub bus is suspected.

Example: Open in both CAN branch lines of ECU G on the sub bus
Tech Tips
- A communication error in a sub bus does not affect the V bus or other buses.
- When a gateway function equipped ECU has memorized the ECUs that are connected to the sub bus, if any of the ECUs connected to the gateway function equipped ECU has a communication error, the background color changes to yellow or red. (The displayed name will not disappear.)

If both of the V bus main bus lines are open, ECUs or sensors that are located farther away from the DLC3 than the open part will be displayed as a communication stop on the CAN Bus Check screen.

(In this case, ECU A and B are not displayed or their background color changes to red.)

*a	V Bus	*b	Sub Bus
*c	Terminating Resistor	*d	Location of Malfunction
*e	Not displayed or background color is red	*f	CAN Bus Check Screen

Tech Tips

If a communication error occurs in an ECU, it is not displayed on the CAN Bus Check screen even though the ECU is present.

If both of the sub bus main bus lines are open, ECUs that are located farther away from the gateway function equipped ECU than the open part will be displayed as a communication stop on the CAN Bus Check screen.

(In this case, ECU I and J are not displayed or their background color changes to red.)

*a	V Bus	*b	Sub Bus
*c	Terminating Resistor	*d	Location of Malfunction
*e	Not displayed or background color is red	*f	CAN Bus Check Screen
*g	Gateway Function Equipped ECU	-	-

*a	When any of the following malfunctions occur on the V bus
*b	When any of the following malfunctions occur on a sub bus
*c	Not displayed

When any of the following malfunctions occur, CAN communication cannot be established and almost all ECUs and sensors on the bus show a communication error on the CAN Bus Check screen.

Details of Malfunction
Short between CAN lines (CANH and CANL)
Short between a CAN line (CANH or CANL) and +B
Short between a CAN line (CANH or CANL) and ground
Open in a CAN main bus line

Tech Tips

When a malfunction occurs on the V bus, almost all ECUs and sensors on the V bus and sub bus indicate a communication error (almost all ECUs are not displayed). As communication with the gateway function equipped ECU that is connected to the V bus stops, communication from the ECUs connected to the sub bus that is monitored by the gateway function equipped ECU also stops (these ECUs are not displayed).
When a malfunction occurs in a sub bus, almost all ECUs connected to the sub bus indicate a communication error.
A communication error in a sub bus does not affect the V bus or other buses.
The malfunctioning part can be determined by checking for a short circuit between CAN bus lines or between a CAN bus line and ground or +B short using an electrical tester.

HOW TO INTERPRET COMMUNICATION DTCS (DTCS THAT START WITH U)

If a CAN communication error cannot be reproduced, determine the suspected malfunctioning part using the DTCs stored in ECUs that are connected to the CAN buses by following the procedure below.

Tech Tips

Communication DTCs (DTCs that start with U) indicate a communication error between the ECU that stores the DTC and the ECU that is indicated by the DTC.
1. If multiple ECUs store a communication DTC for a particular ECU, a communication stop of the ECU is suspected.
  
  *a Items to be Checked - -
  Note
  
  This DTC table is from another model, and is only used here to show an example of DTCs that are output when there is an open in a CAN branch line for the main body ECU. This table does not show DTCs applicable to this vehicle.
  
  Even though a DTC title may indicate a communication error with a specific ECU, the ECU name used in the DTC name on the GTS may differ depending on the ECU that stores the DTC. (Regarding output DTCs, refer to step 6 and the DTC chart for each ECU.)
  Tech Tips
  
  As multiple ECUs indicate a communication stop with the main body ECU, the possibility of a communication stop of the main body ECU is high.
2. If almost all of the communication DTCs of an ECU are stored, a communication stop of the ECU is suspected.
  
  *a Items to be Checked - -
  
  Note
  
  This DTC table is from another model, and is only used here to show an example of DTCs that are output when there is an open in a CAN branch line for the main body ECU. This table does not show DTCs applicable to this vehicle.
  
  Tech Tips
  
  If almost all of the DTCs of the main body ECU are stored, the possibility of a communication stop of the main body ECU is high.
3. When a CAN communication error occurs, many DTCs are output. DTCs other than communication error DTCs (such as DTCs that start with C or B) and communication DTCs for the ABS system are important DTCs, however it may be easier to determine the malfunctioning part by examining the overall situation without considering these DTCs.

To help determine the part of the sub bus that has a communication error, prioritize the communication stop DTCs stored in the gateway function equipped ECU.

*a	Items to be Checked	*b	ECM
*c	Gateway Function Equipped ECU	*d	Location of Malfunction
*e	V Bus	*f	Sub Bus

Note

This DTC table is from another model, and is only used here to show the ECUs connected to both a V bus and a sub bus. It shows DTCs output when there is an open in the main bus lines for the ECM on the sub bus. This table does not show DTCs applicable to this vehicle.

Tech Tips

As gateway function equipped ECUs (sub bus monitor ECU) monitor signals from all ECUs that are connected to sub buses, gateway function equipped ECUs can detect ECUs with a communication stop more accurately.
When there is a communication stop for the gateway function equipped ECU (gateway), communication with ECUs connected to other buses such as the V bus stops. Therefore, communication DTCs for ECUs connected to other buses are also stored.

When any of the following malfunctions occurs, many DTCs are likely to be output from many ECUs. Because of this, it may be difficult to determine the probable malfunctioning part.
- Short between CAN lines (CANH and CANL)
- Short between a CAN line (CANH or CANL) and ground
- Short between a CAN line (CANH or CANL) and +B
- Open in a CAN branch line (CANH or CANL) of an ECU or sensor
- Open in a CAN main bus line (CANH or CANL) between 2 ECUs that have a terminating resistor

DTC TABLE BY ECU

Tech Tips

In the CAN communication system, the CAN communication DTCs of each ECU can be displayed using the GTS.
If CAN communication system DTCs are output, the malfunction cannot be determined only by the DTCs. Perform troubleshooting according to How to Proceed with Troubleshooting.

Click here
If the system function temporarily returns to normal, DTCs may not be output again even though the following DTC check procedures are used.

ECM (for 2GR-FE) / GTS Display "Engine"

Powertrain > Engine > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.
*: Refer to SFI System.

Click here

ECM / GTS Display "Engine"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0101*	Lost Communication with TCM	The ECM does not receive data from the TCM for 1.25 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the ECM is 10.5 V or more.	Turn the engine switch on (IG) and wait at least 2.25 seconds.	MIL illuminates. Displays messages on the multi-information display.	The DTC remains stored until it is cleared using the GTS.

ECM (for 2GR-FE) / GTS Display "Cruise Control"

Powertrain > Cruise Control > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

ECM / GTS Display "Cruise Control"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0122	Lost Communication with Vehicle Dynamics Control Module	The ECM does not receive data from the skid control ECU (brake actuator assembly) for 2.58 seconds.	All conditions are met: The engine switch is on (IG) for 1 second or more. The cruise control switch is on. The power source voltage of the ECM is 10.5 V or more.	Allow the cruise control system to operate for 3.58 seconds or more.	Displays messages on the multi-information display.	The DTC remains stored until it is cleared using the GTS.

TCM (for 2GR-FE) / GTS Display "ECT"

Powertrain > ECT > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.
*: Refer to Automatic Transmission System.

Click here

TCM / GTS Display "ECT"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100*	Lost Communication with ECM/PCM "A"	The TCM does not receive data from the ECM for 1.25 seconds or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage of the TCM is 10.5 V or more.	Turn the engine switch on (IG) and wait at least 2.25 seconds.	MIL illuminates.	The DTC remains stored until it is cleared using the GTS.

Skid Control ECU (Brake Actuator Assembly) / GTS Display "ABS/VSC/TRC"

Chassis > ABS/VSC/TRC > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.
EPB*: Abbreviation for electric parking brake

Skid Control ECU (Brake Actuator Assembly) / GTS Display "ABS/VSC/TRC"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0073	Control Module Communication Bus Off	One of the following conditions is met: Delayed reception of data from the steering sensor and airbag ECU assembly continues for 1 second or more. The following condition occurs 10 times or more within 60 seconds: A communication error between the steering sensor, airbag ECU assembly and the skid control ECU (brake actuator assembly) is detected once or more within 5 seconds. A communication error (bus-off status) with the skid control ECU (brake actuator assembly) occurs 10 times consecutively within 5 seconds.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage (IG1 terminal voltage) of the skid control ECU (brake actuator assembly) is between 10 and 17.4 V.	Turn the engine switch on (IG) and wait at least 61 seconds.	ABS warning light illuminates. Brake warning light illuminates. Slip indicator light illuminates. Brake hold operated indicator light blinks.	The DTC remains stored until it is cleared using the GTS.
U0100	Lost Communication With ECM /PCM "A"	The skid control ECU (brake actuator assembly) does not receive data from the ECM for 2 seconds or more.	All conditions are met: The engine switch is on (IG) for 1 second or more. Vehicle speed is 15 km/h (9 mph) or more. The power source voltage (IG1 terminal voltage) of the skid control ECU (brake actuator assembly) is between 10 and 17.4 V.	Drive the vehicle for 3 seconds at a speed of 15 km/h (9 mph) or more.	Slip indicator light illuminates. Brake hold operated indicator light blinks.	The DTC remains stored until it is cleared using the GTS.
U0124	Lost Communication With Lateral Acceleration Sensor Module	Either of the following conditions is met: The skid control ECU (brake actuator assembly) does not receive data from the airbag ECU assembly for 1 second or more. The following condition occurs 10 times or more within 60 seconds: The skid control ECU (brake actuator assembly) does not receive data from the airbag ECU assembly once or more within 5 seconds.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage (IG1 terminal voltage) of the skid control ECU (brake actuator assembly) is between 10 and 17.4 V.	Turn the engine switch on (IG) and wait at least 61 seconds.	ABS warning light illuminates. Slip indicator light illuminates.	The DTC remains stored until it is cleared using the GTS.
U0126	Lost Communication With Steering Angle Sensor Module	Either of the following conditions is met: The skid control ECU (brake actuator assembly) does not receive data from the steering sensor for 1 second or more. The following condition occurs 10 times or more within 60 seconds: The skid control ECU (brake actuator assembly) does not receive data from the steering sensor once or more within 5 seconds.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage (IG1 terminal voltage) of the skid control ECU (brake actuator assembly) is between 10 and 17.4 V.	Turn the engine switch on (IG) and wait at least 61 seconds.	Slip indicator light illuminates.	The DTC remains stored until it is cleared using the GTS.
U0128	Lost Communication With EPB Module*	The skid control ECU (brake actuator assembly) does not receive data from the parking brake ECU assembly for 1 second or more.	Both conditions are met: The engine switch is on (IG) for 1 second or more. The power source voltage (IG1 terminal voltage) of the skid control ECU (brake actuator assembly) is between 10 and 17.4 V.	Turn the engine switch on (IG) and wait at least 2 seconds.	Brake hold operated indicator light blinks.	The DTC remains stored until it is cleared using the GTS.

Power Steering ECU Assembly / GTS Display "EMPS"

Chassis > EMPS > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Power Steering ECU Assembly / GTS Display "EMPS"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The power steering ECU assembly does not receive data from the ECM for 300 seconds or more.	All conditions are met: The engine switch is on (IG) for 3 seconds or more. Vehicle speed is 20 km/h (12 mph) or more. (power steering system operated) The power source voltage of the power steering ECU assembly is 9 V or more.	Drive the vehicle at a speed of 20 km/h (12 mph) or more for 303 seconds or more.	-	The DTC remains stored until it is cleared using the GTS.
U0129	Lost Communication with Brake System Control Module	The power steering ECU assembly does not receive data from the skid control ECU (brake actuator assembly) for 2.34 seconds or more.	Both conditions are met: The engine switch is on (IG) for 3 seconds or more. The power source voltage of the power steering ECU assembly is 9 V or more.	Turn the engine switch on (IG) and wait at least 5.34 seconds.	EPS warning light illuminates.	The DTC remains stored until it is cleared using the GTS.

Parking Brake ECU Assembly / GTS Display "Electric Parking Brake"

Chassis > Electric Parking Brake > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Parking Brake ECU Assembly / GTS Display "Electric Parking Brake"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0073	Control Module Communication Bus OFF	The parking brake ECU assembly cannot send/receive data.	Both conditions are met: The engine switch is on (IG). The power source voltage of the parking brake ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait several seconds. (The time required to wait varies depending on the communication timing.)	Displays messages on the multi-information display. EPB warning light illuminates.	The DTC remains stored until it is cleared using the GTS.
U0100	Lost Communication With ECM/PCM "A"	Either of the following conditions is met: The parking brake ECU assembly does not receive data from the ECM for 1 second or more. The parking brake ECU assembly does not receive data from the ECM for 10 seconds or more.	Both conditions are met: Vehicle speed is 15 km/h (9 mph) or more. The power source voltage of the parking brake ECU assembly is 10 V or more.	Drive the vehicle for 10 minutes at a speed of 15 km/h (9 mph) or more.	Displays messages on the multi-information display. EPB warning light illuminates.	The DTC remains stored until it is cleared using the GTS.
U0124	Lost Communication With Lateral Acceleration Sensor Module	The parking brake ECU assembly is unable to receive certain data from the skid control ECU (brake actuator assembly) or airbag ECU assembly assembly.	Both conditions are met: Vehicle speed is 7 km/h (4 mph) or more. The power source voltage of the parking brake ECU assembly is 10 V or more.	Vehicle speed is 7 km/h (4 mph) or more.	Displays messages on the multi-information display. EPB warning light illuminates.	The DTC remains stored until it is cleared using the GTS.
U0129	Lost Communication With Brake System Control Module	Either of the following conditions is met: The parking brake ECU assembly does not receive data from the skid control ECU (brake actuator assembly) for 1 second or more. The parking brake ECU assembly does not receive data from the skid control ECU (brake actuator assembly) for 10 seconds or more.	Both conditions are met: The engine switch is on (IG). The power source voltage of the parking brake ECU assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	Displays messages on the multi-information display. EPB warning light illuminates.	The DTC remains stored until it is cleared using the GTS.

Network Gateway ECU (w/ Network Gateway ECU) / GTS Display "Gateway"

Body Electrical > Gateway > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.
*1: w/ Automatic High Beam System
*2: w/ Panoramic View Monitor System

Network Gateway ECU / GTS Display "Gateway"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U023A*1	Lost Communication with Front Camera Module	The network gateway ECU does not receive data from the inner rear view mirror assembly for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 11 seconds or more. The power source voltage of the network gateway ECU is between 9.5 and 10.5 V.	Turn the engine switch on (IG) and wait at least 21 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U023B*2	Lost Communication with Panoramic View Monitor Control Module	The network gateway ECU does not receive data from the parking assist ECU for 10 seconds or more.	Both conditions are met: The engine switch is on (IG) for 11 seconds or more. The power source voltage of the network gateway ECU is between 9.5 and 10.5 V.	Turn the engine switch on (IG) and wait at least 21 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U1002	Lost Communication with Gateway Module	The network gateway ECU detects communication errors between itself and the inner rear view mirror assembly and parking assist ECU.	Both conditions are met: The engine switch is on (IG) for 11 seconds or more. The power source voltage of the network gateway ECU is between 9.5 and 10.5 V.	Turn the engine switch on (IG) and wait at least 21 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Main Body ECU (Multiplex Network Body ECU) / GTS Display "Main Body"

Body Electrical > Main Body > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.
*: w/o Network Gateway ECU

Main Body ECU (Multiplex Network Body ECU) / GTS Display "Main Body"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication With ECM/PCM "A"	The main body ECU (multiplex network body ECU) does not receive data from the ECM for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0101	Lost Communication with TCM	The main body ECU (multiplex network body ECU) does not receive data from the ECM for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0120	Lost Communication With Starter / Generator Control Module	The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0129	Lost Communication with Brake Systerm Control Module	The main body ECU (multiplex network body ECU) does not receive data from the skid control ECU (brake actuator assembly) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0151	Lost Communication with Restraints Control Module	The main body ECU (multiplex network body ECU) does not receive data from the airbag ECU assembly for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The main body ECU (multiplex network body ECU) does not receive data from the combination meter assembly for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0182	Lost Communication with AFS	The main body ECU (multiplex network body ECU) does not receive data from the headlight light control ECU sub-assembly LH for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0199	Lost Communication with ''Door Control Module A''	The main body ECU (multiplex network body ECU) does not receive data from the outer mirror control ECU assembly (for driver side) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0200	Lost Communication with ''Door Control Module B''	The main body ECU (multiplex network body ECU) does not receive data from the outer mirror control ECU assembly (for front passenger side) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0201	Lost Communication with ''Door Control Module C''	The main body ECU (multiplex network body ECU) does not receive data from the slide door motor unit RH for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0202	Lost Communication with ''Door Control Module D''	The main body ECU (multiplex network body ECU) does not receive data from the slide door motor unit LH for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0208	Lost Communication with ''Seat Control Module A''	The main body ECU (multiplex network body ECU) does not receive data from the front power seat switch LH for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0230	Lost Communication with Rear Gate Module	The main body ECU (multiplex network body ECU) does not receive data from the back door motor unit for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U023A	Lost Communication With Image Processing Module "A"	The main body ECU (multiplex network body ECU) does not receive data from the inner rear view mirror assembly for 5 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 5 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	Automatic high beam indicator light blinks.	The DTC remains stored until it is cleared using the GTS.
U024A	Lost Communication with Interior Lighting Control Module	The main body ECU (multiplex network body ECU) does not receive data from the room light control relay for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0327	Software Incompatibility with Vehicle Security Control Module	The main body ECU (multiplex network body ECU) does not receive data from the certification ECU (smart key ECU assembly) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U1002	Lost Communication with Gateway Module	The main body ECU (multiplex network body ECU) detects communication errors between itself and the room light control relay, back door motor unit, slide door motor unit RH, slide door motor unit LH, outer mirror control ECU assembly (for driver side), outer mirror control ECU assembly (for front passenger side), headlight light control ECU sub-assembly LH and front power seat switch LH.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U1106	Lost Communication with Electric Parking Brake Module	The main body ECU (multiplex network body ECU) does not receive data from the parking brake ECU assembly for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U1117*	Lost Communication with Accessory Gateway	The main body ECU (multiplex network body ECU) does not receive data from the option connector (bus buffer ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the main body ECU (multiplex network body ECU) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Certification ECU (Smart Key ECU Assembly) / GTS Display "Entry&Start"

Body Electrical > Entry&Start > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.
*: w/o Network Gateway ECU

Certification ECU (Smart Key ECU Assembly) / GTS Display "Entry&Start"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication With ECM/PCM "A"	The certification ECU (smart key ECU assembly) does not receive data from the ECM for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0142	Lost Communication with Body Control Module "B"	The certification ECU (smart key ECU assembly) does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The certification ECU (smart key ECU assembly) does not receive data from the combination meter assembly for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U1117*	Lost Communication with Accessory Gateway	The certification ECU (smart key ECU assembly) does not receive data from the option connector (bus buffer ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Certification ECU (Smart Key ECU Assembly) / GTS Display "Power Source Control"

Body Electrical > Power Source Control > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.
*: w/o Network Gateway ECU

Certification ECU (Smart Key ECU Assembly) / GTS Display "Power Source Control"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	ECM Communication	The certification ECU (smart key ECU assembly) does not receive data from the ECM for 3.1 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 3.1 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0140	Lost Communication with Body Control Module	The certification ECU (smart key ECU assembly) does not receive data from the main body ECU (multiplex network body ECU) for 3 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	The certification ECU (smart key ECU assembly) does not receive data from the combination meter assembly for 3.1 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 3.1 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U1117*	Lost Communication with Accessory Gateway	The certification ECU (smart key ECU assembly) does not receive data from the option connector (bus buffer ECU) for 5 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Certification ECU (Smart Key ECU Assembly) / GTS Display "Starting Control"

Body Electrical > Starting Control > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Certification ECU (Smart Key ECU Assembly) / GTS Display "Starting Control"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The certification ECU (smart key ECU assembly) does not receive data from the ECM for 2 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the certification ECU (smart key ECU assembly) is 10.5 V or more.	Turn the engine switch on (IG) and wait at least 2 seconds.	-	DTC remains stored only while malfunction is occurring.

Headlight light control ECU sub-assembly LH / GTS Display "HL AutoLeveling"

Body Electrical > HL AutoLeveling > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.
*1: Inspect the lighting system when DTC U0242 is output for the headlight light control ECU sub-assembly LH.

Click here
*2: Inspect the headlight light auto leveling system when DTC U1000 is output for the headlight light control ECU sub-assembly LH.

Click here

Headlight Light Control ECU Sub-assembly LH / GTS Display "HL AutoLeveling"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0073	Control Module Communication Bus Off	The headlight light control ECU sub-assembly LH cannot send/received data.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the headlight light control ECU sub-assembly LH is 10 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0100	Lost Communication with ECM/PCM "A"	Headlight light control ECU sub-assembly LH does not receive data from the ECM for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the headlight light control ECU sub-assembly LH is 10 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0101	Lost Communication with TCM	Headlight light control ECU sub-assembly LH does not receive data from the ECM for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the headlight light control ECU sub-assembly LH is 10 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0126	Lost Communication with Steering Angle Sensor Module	Headlight light control ECU sub-assembly LH does not receive data from the steering sensor for 5 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the headlight light control ECU sub-assembly LH is 10 V or more.	Turn the engine switch on (IG) and wait at least 8 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0129	Lost Communication with Brake System Control Module	Headlight light control ECU sub-assembly LH does not receive data from the skid control ECU (brake actuator assembly) assembly for 5 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the headlight light control ECU sub-assembly LH is 10 V or more.	Turn the engine switch on (IG) and wait at least 8 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0142	Lost Communication with Body Control Module "B"	Headlight light control ECU sub-assembly LH does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the headlight light control ECU sub-assembly LH is 10 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0155	Lost Communication with Instrument Panel Cluster (IPC) Control Module	Headlight light control ECU sub-assembly LH does not receive data from the combination meter assembly for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the headlight light control ECU sub-assembly LH is 10 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0242*1	Lost Communication With Headlamp Control Module "B"	Headlight light control ECU sub-assembly LH does not receive data from the Headlight light control ECU sub-assembly RH for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the headlight light control ECU sub-assembly LH is 10 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U1000*2	CAN Communication Failure(Message Registry)	CAN communication malfunction (message register)	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the headlight light control ECU sub-assembly LH is 10 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Outer Mirror Control ECU Assembly (for Driver Side) / GTS Display "Mirror L"

Body Electrical > Mirror L > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Outer Mirror Control ECU Assembly (for Driver Side) / GTS Display "Mirror R"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0142	Lost Communication With Body Control Module ''B''	Outer mirror control ECU assembly (for driver side) does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the outer mirror control ECU assembly (for driver side) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Outer Mirror Control ECU Assembly (for Front Passenger Side) / GTS Display "Mirror R"

Body Electrical > Mirror R > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Outer Mirror Control ECU Assembly (for Front Passenger Side) / GTS Display "Mirror L"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0142	Lost Communication With Body Control Module ''B''	Outer mirror control ECU assembly (for front passenger side) does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Power source status change (+B OFF → ON, ACC ON ←→ OFF, IG ON ←→ OFF) is detected and 10 seconds or more elapse. The power source voltage of the outer mirror control ECU assembly (for front passenger side) is 10 V or more.	Turn the engine switch on (IG) and wait at least 20 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Air Conditioning Amplifier Assembly / GTS Display "Air Conditioner"

Body Electrical > Air Conditioner > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Air Conditioning Amplifier Assembly / GTS Display "Air Conditioner"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication With ECM/PCM "A"	Air conditioning amplifier assembly does not receive data from the ECM for 5 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0131	Lost Communication With Power Steering Control Module	Air conditioning amplifier assembly does not receive data from the power steering ECU assembly for 5 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0142	Lost Communication With Body Control Module "B"	Air conditioning amplifier assembly does not receive data from the main body ECU (multiplex network body ECU) for 5 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0155	Lost Communication With Instrument Panel Cluster (IPC) Control Module	Air conditioning amplifier assembly does not receive data from the combination meter assembly for 5 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0163	Lost Communication With Navigation Control Module	Air conditioning amplifier assembly does not receive data from the navigation receiver assembly for 5 seconds or more (for Navigation Receiver Type). Air conditioning amplifier assembly does not receive data from the radio and display receiver assembly for 5 seconds or more (for Radio and Display Type).	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the air conditioning amplifier assembly is 10 V or more.	Turn the engine switch on (IG) and wait at least 5 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Combination Meter Assembly / GTS Display "Combination Meter"

Body Electrical > Combination Meter > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Combination Meter Assembly / GTS Display "Combination Meter"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Lost Communication with ECM/PCM "A"	The combination meter assembly does not receive data from the ECM for 2 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the combination meter assembly is 9.5 to 11.5 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	The ECO light turns off. MIL illuminates.	The DTC remains stored until it is cleared using the GTS.
U0129	Lost Communication with Brake System Control Module	Combination meter assembly does not receive data from the skid control ECU (brake actuator assembly) for 3 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the combination meter assembly is 9.5 to 11.5 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	ABS warning light illuminates. Brake warning light / red (malfunction) illuminates. Brake warning light / yellow (minor malfunction) illuminates. Slip indicator light illuminates.	The DTC remains stored until it is cleared using the GTS.
U0131	Lost Communication with Power Steering Control Module	Combination meter assembly does not receive data from the power steering ECU assembly for 3 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the combination meter assembly is 9.5 to 11.5 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	The EPS warning light illuminates.	The DTC remains stored until it is cleared using the GTS.
U0142	Lost Communication with Body Control Module "B"	Combination meter assembly does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the combination meter assembly is 9.5 to 11.5 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0151	Lost Communication with Restraints Control Module	Combination meter assembly does not receive data from the airbag ECU assembly for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the combination meter assembly is 9.5 to 11.5 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	The SRS warning light illuminates.	The DTC remains stored until it is cleared using the GTS.
U0163	Lost Communication With Navigation Control Module	Combination meter assembly does not receive data from the navigation receiver assembly for 3 seconds or more (for Navigation Receiver Type). Combination meter assembly does not receive data from the radio and display receiver assembly for 3 seconds or more (for Radio and Display Type).	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the combination meter assembly is 9.5 to 11.5 V or more.	Turn the engine switch on (IG) and wait at least 3 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0182	Lost Communication with Lighting Control Module Front	Combination meter assembly does not receive data from the headlight light control ECU sub-assembly LH for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the combination meter assembly is 9.5 to 11.5 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Clearance Warning ECU Assembly / GTS Display "Clearance Sonar"

Body Electrical > Clearance Sonar > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Clearance Warning ECU Assembly / GTS Display "Clearance Sonar"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0101	Lost Communication with TCM	Clearance warning ECU assembly does not receive data from the ECM for 5 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 5 seconds or more. The power source voltage of the clearance warning ECU assembly is 10.2 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	Displays messages on the multi-information display.	The DTC remains stored until it is cleared using the GTS.
U0129	Lost Communication with Brake System Control Module	Clearance warning ECU assembly does not receive data from the skid control ECU (brake actuator assembly) for 4.92 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 5 seconds or more. The power source voltage of the clearance warning ECU assembly is 10.2 V or more.	Turn the engine switch on (IG) and wait at least 9.92 seconds.	Displays messages on the multi-information display.	The DTC remains stored until it is cleared using the GTS.
U0155	Lost Communication With Instrument Panel Cluster (IPC) Control Module	Clearance warning ECU assembly does not receive data from the combination meter assembly for 5 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 5 seconds or more. The power source voltage of the clearance warning ECU assembly is 10.2 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	Displays messages on the multi-information display.	The DTC remains stored until it is cleared using the GTS.

Navigation Receiver Assembly (for Navigation Receiver Type) / GTS Display "Navigation System"

Body Electrical > Navigation System > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Navigation Receiver Assembly / GTS Display "Navigation System"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0073	Sending Malfunction (Navigation to APGS)	The navigation receiver assembly is unable to send or receive data 5 seconds consecutively.	Both conditions are met: Turn the engine switch on (IG) for 1 second or more. The power source voltage of the navigation receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 6 seconds.	Displays messages on the multi-information display.	The DTC remains stored until it is cleared using the GTS.
U0100	Engine ECU Communication	Navigation receiver assembly does not receive data from the ECM for 12 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 1 second or more. The power source voltage of the navigation receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0129	VSC(ECB)ECU Communication	Navigation receiver assembly does not receive data from the skid control ECU (brake actuator assembly) for 1 second or more.	Both conditions are met: Turn the engine switch on (IG) for 1 second or more. The power source voltage of the navigation receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 2 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0140	Lost Communication with Body Control Module	Navigation receiver assembly does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 1 second or more. The power source voltage of the navigation receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 11 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0155	Meter ECU Communication	Navigation receiver assembly does not receive data from the combination meter assembly for 30 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the navigation receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 30 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U1110	Clearance Sonar ECU Communication	Navigation receiver assembly does not receive data from the clearance warning ECU assembly for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the navigation receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Radio and Display Receiver Assembly (for Radio and Display Type) / GTS Display "Navigation System"

Body Electrical > Navigation System > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Radio and Display Receiver Assembly (for Radio and Display Type) / GTS Display "Navigation System"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0073	Sending Malfunction (Navigation to APGS)	The radio and display receiver assembly is unable to send or receive data 5 seconds consecutively.	Both conditions are met: Turn the engine switch on (IG) for 1 second or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 6 seconds.	Displays messages on the multi-information display.	The DTC remains stored until it is cleared using the GTS.
U0100	Engine ECU Communication	Radio and display receiver assembly does not receive data from the ECM for 12 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 1 second or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0129	VSC(ECB)ECU Communication	Radio and display receiver assembly does not receive data from the skid control ECU (brake actuator assembly) for 1 second or more.	Both conditions are met: Turn the engine switch on (IG) for 1 second or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 2 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0140	Lost Communication with Body Control Module	Radio and display receiver assembly does not receive data from the main body ECU (multiplex network body ECU) for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 1 second or more. The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 11 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0155	Meter ECU Communication	Radio and display receiver assembly does not receive data from the combination meter assembly for 30 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 30 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U1110	Clearance Sonar ECU Communication	Radio and display receiver assembly does not receive data from the clearance warning ECU assembly for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG). The power source voltage of the radio and display receiver assembly is 9.5 V or more.	Turn the engine switch on (IG) and wait at least 10 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Parking Assist ECU (w/ Panoramic View Monitor System) / GTS Display "Panoramic View Monitor"

Chassis > Panoramic View Monitor > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Parking Assist ECU (w/ Panoramic View Monitor System) / GTS Display "Panoramic View Monitor"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0073	Control Module Communication Bus Off	The parking assist ECU is unable to send or receive data 1.24 seconds consecutively.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the parking assist ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 4.24 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0100	Lost Communication with ECM/PCM "A"	Parking assist ECU does not receive data from the ECM for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the parking assist ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0126	Lost Communication with Steering Angle Sensor Module	Parking assist ECU does not receive data from the steering sensor for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the parking assist ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0129	Lost Communication with Brake System Control Module	Parking assist ECU does not receive data from the skid control ECU (brake actuator assembly) for 1.48 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the parking assist ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 4.48 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U0140	Lost Communication with Body Control Module	Parking assist ECU does not receive data from the main body ECU (multiplex network body ECU) for 6 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the parking assist ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 9 seconds.	-	The DTC remains stored until it is cleared using the GTS.
U1000	CAN Communication Failure(Message Registry)	CAN communication malfunction (message register)	Turn the engine switch on (IG).	Turn the engine switch on (IG)	-	The DTC remains stored until it is cleared using the GTS.
U1110	Lost Communication with Clearance Sonar Module	Parking assist ECU does not receive data from the clearance warning ECU assembly for 10 seconds or more.	Both conditions are met: Turn the engine switch on (IG) for 3 seconds or more. The power source voltage of the parking assist ECU is 10 V or more.	Turn the engine switch on (IG) and wait at least 13 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Telematics Transceiver (w/ Manual (SOS) Switch) / GTS Display "Telematics"

Body Electrical > Telematics > Trouble Codes

Tech Tips

This ECU uses the CAN communication system for DTC communication.

Telematics Transceiver / GTS Display "Telematics"
DTC	Detection Item	DTC Detection Condition	DTC Detection Pre-condition	DTC Check Procedure	Warning Indication in Meter	DTC Storage Method
U0100	Engine ECU Communication	The telematics transceiver does not receive data from the ECM for 1.5 seconds or more.	The engine switch on (IG) for 10 seconds or more.	Turn the engine switch on (IG) and wait at least 11.5 seconds.	-	The DTC remains stored until it is cleared using the GTS.

Steering Sensor

Tech Tips

The steering sensor is connected to the CAN communication system, but the steering sensor does not store or output CAN communication DTCs.
Front Power Seat Switch LH

Tech Tips

The front power seat switch LH is connected to the CAN communication system, but the front power seat switch LH does not store or output CAN communication DTCs.
Back Door Motor Unit

Tech Tips

The back door motor unit is connected to the CAN communication system, but the back door motor unit does not store or output CAN communication DTCs.
Airbag ECU Assembly

Tech Tips

The airbag ECU assembly is connected to the CAN communication system, but the airbag ECU assembly does not store or output CAN communication DTCs.
Slide Door Motor Unit LH

Tech Tips

The slide door motor unit LH is connected to the CAN communication system, but the slide door motor unit LH does not store or output CAN communication DTCs.
Slide Door Motor Unit RH

Tech Tips

The slide door motor unit RH is connected to the CAN communication system, but the slide door motor unit RH does not store or output CAN communication DTCs.
Room Light Control Relay

Tech Tips

The room light control relay is connected to the CAN communication system, but the room light control relay does not store or output CAN communication DTCs.

DTC COMBINATION TABLE (OPEN OR SHORT V BUS, PAST COMMUNICATION ERROR)

Regarding a past communication error of an ECU and sensor connected to the V bus (in this case, normal is displayed when performing the CAN bus check, but communication DTCs are output), the probable CAN bus line(s) that had a malfunction can be determined based on the following DTC combination table.

Tech Tips

Based on the table below and DTCs output from ECUs connected via CAN communication, the probable part for which communication stop occurred can be determined.
Regarding an open in a CAN bus line(s) and a communication stop that is currently occurring, the malfunctioning part can be confirmed easily by performing the CAN bus check using the GTS because the ECU or sensor connected to the CAN bus line(s) does not respond (the ECU or sensor name will not be displayed on the screen).
If an open in a CAN main bus line, a short between the CAN bus lines (CANH and CANL) or a short to ground or +B in the CAN bus occurs, DTCs of almost all ECUs (or sensors) on the CAN bus may be output, or a message indicating a communication error may be displayed on the GTS screen. In this case, check the resistance of the CAN bus (steps 7 to 9) first.

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If an open occurs in just one of the lines of a CAN bus line(s), DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.

-			Trouble Mode (Open in Both CAN Branch Lines)
-			V Bus
Output ECU		Output DTC	Center Airbag Sensor Communication Stop Mode Click here	Air Conditioning Amplifier Communication Stop Mode Click here	Navigation Receiver Assembly Communication Stop Mode Click here	Radio Receiver Assembly Communication Stop Mode Click here
V Bus	Airbag ECU Assembly	-	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	○	-	-
		U0131	-	○	-	-
		U0142	-	○	-	-
		U0155	-	○	-	-
		U0163	-	○	○	○
	Navigation Receiver Assembly*1	U0100	-	-	○	-
		U0129	-	-	○	-
		U0140	-	-	○	-
		U0155	-	-	○	-
		U1110	-	-	○	-
	Radio and Display Receiver Assembly*1	U0100	-	-	-	○
		U0129	-	-	○	-
		U0140	-	-	-	○
		U0155	-	-	○	-
		U1110	-	-	-	○
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-	-	-
		U0101	-	-	-	-
		U0120	-	-	-	-
		U0129	-	-	-	-
		U0151	-	-	-	-
		U0155	-	-	-	-
		U023A	-	-	-	-
		U0327	-	-	-	-
		U1106	-	-	-	-
		U1117	-	-	-	-
V Bus	Network Gateway ECU	-	-	-	-	-
	Clearance Warning ECU Assembly	U0101	-	-	-	-
		U0129	-	-	-	-
		U0155	-	-	-	-
	ECM (Cruise Control System)	U0122	-	-	-	-
	Parking Brake ECU Assembly*1	U0100	-	-	-	-
		U0124	○	-	-	-
		U0129	-	-	-	-
	Power Steering ECU Assembly	U0100	-	-	-	-
	Power Steering ECU Assembly	U0129	-	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	-	-	-
		U0142	-	-	-	-
		U0155	-	-	-	-
		U1117	-	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	-	-	-
		U0140	-	-	-	-
		U0155	-	-	-	-
		U1117	-	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	-	-	-
	Combination Meter Assembly	U0100	-	-	-	-
		U0129	-	-	-	-
		U0131	-	-	-	-
		U0142	-	-	-	-
		U0151	○	-	-	-
		U0163	-	-	○	○
		U0182	-	-	-	-
	Steering Sensor	-	-	-	-	-
	DLC3	-	-	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-	-	-
		U0124	○	-	-	-
		U0126	-	-	-	-
		U0128	-	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-	-	-
		U023B	-	-	-	-
		U1002	-	-	-	-
Sub Bus 2	Inner Rear View Mirror Assembly	-	-	-	-	-
	Telematics Transceiver	U0100	-	-	-	-
	Parking Assist ECU12	U0100	-	-	-	-
		U0126	-	-	-	-
		U0129	-	-	-	-
		U0140	-	-	-	-
		U1110	-	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	-	-	-	-
		U0101	-	-	-	-
		U0126	-	-	-	-
		U0129	-	-	-	-
		U0142	-	-	-	-
		U0155	-	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-	-	-
		U1002	-	-	-	-
		U0230	-	-	-	-
		U0208	-	-	-	-
		U0199	-	-	-	-
		U0200	-	-	-	-
		U0201	-	-	-	-
		U0202	-	-	-	-
		U024A	-	-	-	-
	Back Door Motor Unit	-	-	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	-	-	-
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	-	-	-	-
	Slide Door Motor Unit LH	-	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-	-
	Room Light Control Relay	-	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

-			Trouble Mode (Open in Both CAN Branch Lines)
-			V Bus
Output ECU		Output DTC	Main Body ECU Communication Stop Mode Click here	Clearance Warning ECU Communication Stop Mode Click here	Electric Parking Brake ECU Communication Stop Mode Click here	Power Steering ECU Communication Stop Mode Click here
V Bus	Airbag ECU Assembly	-	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	-	-	-
		U0131	-	-	-	-
		U0142	○	-	-	-
		U0155	-	-	-	-
		U0163	-	-	-	-
	Navigation Receiver Assembly*1	U0100	-	-	-	-
		U0129	-	-	-	-
		U0140	○	-	-	-
		U0155	-	-	-	-
		U1110	-	○	-	-
	Radio and Display Receiver Assembly*1	U0100	-	-	-	-
		U0129	-	-	-	-
		U0140	○	-	-	-
		U0155	-	-	-	-
		U1110	-	○	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	○	-	-	-
		U0101	○	-	-	-
		U0120	○	-	-	-
		U0129	○	-	-	-
		U0151	○	-	-	-
		U0155	○	-	-	-
		U023A	○	-	-	-
		U0327	○	-	-	-
		U1106	○	-	○	-
		U1117	○	-	-	-
V Bus	Network Gateway ECU	-	-	-	-	-
	Clearance Warning ECU Assembly	U0101	-	○	-	-
		U0129	-	○	-	-
		U0155	-	○	-	-
	ECM (Cruise Control System)	U0122	-	-	-	-
	Parking Brake ECU Assembly*1	U0100	-	-	○	-
		U0124	-	-	○	-
		U0129	-	-	-	○
	Power Steering ECU Assembly	U0100	-	-	-	○
	Power Steering ECU Assembly	U0129	-	-	-	○
	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	-	-	-
		U0142	○	-	-	-
		U0155	-	-	-	-
		U1117	-	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	-	-	-
		U0140	○	-	-	-
		U0155	-	-	-	-
		U1117	-	○	-	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	-	-	-
	Combination Meter Assembly	U0100	-	-	-	-
		U0129	-	-	-	-
		U0131	-	-	-	○
		U0142	○	-	-	-
		U0151	-	-	-	-
		U0163	-	-	-	-
		U0182	○	-	-	-
	Steering Sensor	-	-	-	-	-
	DLC3	-	-	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-	-	-
		U0124	-	-	-	-
		U0126	-	-	-	-
		U0128	-	-	○	-
	Option Connector (Bus Buffer ECU)	-	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-	-	-
		U023B	-	-	-	-
		U1002	-	-	-	-
	Telematics Transceiver	U0100	-	-	-	-
Sub Bus 2	Inner Rear View Mirror Assembly	-	-	-	-	-
	Parking Assist ECU12	U0100	-	-	-	-
		U0126	-	-	-	-
		U0129	-	-	-	-
		U0140	○	-	-	-
		U1110	-	○	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	○	-	-	-
		U0101	○	-	-	-
		U0126	○	-	-	-
		U0129	○	-	-	-
		U0142	-	-	-	-
		U0155	○	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-	-	-
		U1002	-	-	-	-
		U0230	-	-	-	-
		U0208	-	-	-	-
		U0199	-	-	-	-
		U0200	-	-	-	-
		U0201	-	-	-	-
		U0202	-	-	-	-
		U024A	-	-	-	-
	Back Door Motor Unit	-	-	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	-	-	-
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	-	-	-	-
	Slide Door Motor Unit LH	-	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-	-
	Room Light Control Relay	-	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

-			Trouble Mode (Open in Both CAN Branch Lines)
-			V Bus
Output ECU		Output DTC	Gateway ECU Communication Stop Mode Click here	Certification ECU Communication Stop Mode Click here	Steering Angle Sensor Communication Stop Mode Click here	DLC3
V Bus	Airbag ECU Assembly	-	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	-	-	-
		U0131	-	-	-	-
		U0142	-	-	-	-
		U0155	-	-	-	-
		U0163	-	-	-	-
	Navigation Receiver Assembly*1	U0100	-	-	-	-
		U0129	-	-	-	-
		U0140	-	-	-	-
		U0155	-	-	-	-
		U1110	-	-	-	-
	Radio and Display Receiver Assembly*1	U0100	-	-	-	-
		U0129	-	-	-	-
		U0140	-	-	-	-
		U0155	-	-	-	-
		U1110	-	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-	-	-
		U0101	-	-	-	-
		U0120	-	○	-	-
		U0129	-	-	-	-
		U0151	-	-	-	-
		U0155	-	-	-	-
		U023A	○	-	-	-
		U0327	-	○	-	-
		U1106	-	-	-	-
		U1117	○	-	-	-
V Bus	Network Gateway ECU	-	-	-	-	-
	Clearance Warning ECU Assembly	U0101	-	-	-	-
		U0129	-	-	-	-
		U0155	-	-	-	-
	ECM (Cruise Control System)	U0122	-	-	-	-
	Parking Brake ECU Assembly*1	U0100	-	-	-	-
		U0124	-	-	-	-
		U0129	-	-	-	-
	Power Steering ECU Assembly	U0100	-	-	-	-
	Power Steering ECU Assembly	U0129	-	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	○	-	-
		U0142	-	○	-	-
		U0155	-	○	-	-
		U1117	○	○	-	-
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	○	-	-
		U0140	-	○	-	-
		U0155	-	○	-	-
		U1117	-	○	-	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	○	-	-
	Combination Meter Assembly	U0100	-	-	-	-
		U0129	-	-	-	-
		U0131	-	-	-	-
		U0142	-	-	-	-
		U0151	-	-	-	-
		U0163	-	-	-	-
		U0182	-	-	-	-
	Steering Sensor	-	-	-	-	-
	DLC3	-	-	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-	-	-
		U0124	-	-	-	-
		U0126	-	-	○	-
		U0128	-	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-	-	-
		U023B	-	-	-	-
		U1002	-	-	-	-
	Telematics Transceiver	U0100	○	-	-	-
Sub Bus 2	Inner Rear View Mirror Assembly	-	-	-	-	-
	Parking Assist ECU12	U0100	○	-	-	-
		U0126	○	-	○	-
		U0129	○	-	-	-
		U0140	○	-	-	-
		U1110	○	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	-	-	-	-
		U0101	-	-	-	-
		U0126	-	-	○	-
		U0129	-	-	-	-
		U0142	-	-	-	-
		U0155	-	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-	-	-
		U1002	-	-	-	-
		U0230	-	-	-	-
		U0208	-	-	-	-
		U0199	-	-	-	-
		U0200	-	-	-	-
		U0201	-	-	-	-
		U0202	-	-	-	-
		U024A	-	-	-	-
	Back Door Motor Unit	-	-	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	-	-	-
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	-	-	-	-
	Slide Door Motor Unit LH	-	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-	-
	Room Light Control Relay	-	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

-			Trouble Mode (Open in Both CAN Branch Lines)
-			V Bus
Output ECU		Output DTC	Brake Actuator (Skid Control ECU) Communication Stop Mode Click here	Bus Buffer ECU Communication Stop Mode Click here
V Bus	Airbag ECU Assembly	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	-
		U0131	-	-
		U0142	-	-
		U0155	-	-
		U0163	-	-
	Navigation Receiver Assembly*1	U0100	-	-
		U0129	○	-
		U0140	-	-
		U0155	-	-
		U1110	-	-
	Radio and Display Receiver Assembly*1	U0100	-	-
		U0129	○	-
		U0140	-	-
		U0155	-	-
		U1110	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-
		U0101	-	-
		U0120	-	-
		U0129	○	-
		U0151	-	-
		U0155	-	-
		U023A	-	-
		U0327	-	-
		U1106	-	-
		U1117	-	○
	Network Gateway ECU	-	-	-
V Bus	Clearance Warning ECU Assembly	U0101	-	-
		U0129	-	-
		U0155	-	-
	ECM (Cruise Control System)	U0122	○	-
	Parking Brake ECU Assembly*1	U0100	-	-
		U0124	-	-
		U0129	○	-
	Power Steering ECU Assembly	U0100	-	-
	Power Steering ECU Assembly	U0129	○	-
	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	-
		U0142	-	-
		U0155	-	-
		U1117	-	-
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	-
		U0140	-	-
		U0155	-	-
		U1117	-	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	-
	Combination Meter Assembly	U0100	-	-
		U0129	○	-
		U0131	-	-
		U0142	-	-
		U0151	-	-
		U0163	-	-
		U0182	-	-
	Steering Sensor	-	-	-
	DLC3	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	○	-
		U0124	○	-
		U0126	○	-
		U0128	○	-
	Option Connector (Bus Buffer ECU)	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-
		U023B	-	-
		U1002	-	-
	Telematics Transceiver	U0100	-	-
	Inner Rear View Mirror Assembly	-	-	-
	Parking Assist ECU12	U0100	-	-
		U0126	-	-
		U0129	○	-
		U0140	-	-
		U1110	-	-
	Option Connector (Bus Buffer ECU)	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	-	-
		U0101	-	-
		U0126	-	-
		U0129	○	-
		U0142	-	-
		U0155	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-
		U1002	-	-
		U0230	-	-
		U0208	-	-
		U0199	-	-
		U0200	-	-
		U0201	-	-
		U0202	-	-
		U024A	-	-
	Back Door Motor Unit	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	-
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	-	-
	Slide Door Motor Unit LH	-	-	-
	Slide Door Motor Unit RH	-	-	-
	Front Power Seat Switch LH	-	-	-
	Room Light Control Relay	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

-			Trouble Mode (Open in Both CAN Main Bus Lines)
-			V Bus
Output ECU		Output DTC	Combination Meter ECU Communication Stop Mode Click here	No. 4 CAN Junction Connector to No. 3 CAN Junction Connector	ECM Communication Stop Mode Click here
V Bus	Airbag ECU Assembly	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	○	○
		U0131	-	○	-
		U0142	-	○	-
		U0155	○	-	-
		U0163	-	○	-
	Navigation Receiver Assembly*1	U0100	-	-	○
		U0129	-	-	-
		U0140	-	-	-
		U0155	○	○	-
		U1110	-	○	-
	Radio and Display Receiver Assembly*1	U0100	-	-	○
		U0129	-	-	-
		U0140	-	-	-
		U0155	○	○	-
		U1110	-	○	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-	○
		U0101	-	-	○
		U0120	-	○	-
		U0129	-	-	-
		U0151	-	-	-
		U0155	○	○	-
		U023A	-	○	-
		U0327	-	○	-
		U1106	-	-	-
		U1117	-	○	-
	Network Gateway ECU	-	-	-	-
	Clearance Warning ECU Assembly	U0101	-	○	○
		U0129	-	○	-
		U0155	○	-	-
	ECM (Cruise Control System)	U0122	○	-	-
	Parking Brake ECU Assembly*1	U0100	○	-	-
		U0124	-	-	-
		U0129	-	-	-
	Power Steering ECU Assembly	U0100	○	-	-
	Power Steering ECU Assembly	U0129	-	-	-
V Bus	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	○	○
		U0142	-	○	-
		U0155	○	-	-
		U1117	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	○	○
		U0140	-	○	-
		U0155	○	-	-
		U1117	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	○	○
	Combination Meter Assembly	U0100	○	○	○
		U0129	-	○	-
		U0131	-	○	-
		U0142	-	○	-
		U0151	-	○	-
		U0163	-	○	-
		U0182	○	○	-
	Steering Sensor	-	-	-	-
	DLC3	-	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-	-
		U0124	-	-	-
		U0126	-	-	-
		U0128	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-	-
		U023B	-	-	-
		U1002	-	-	-
	Telematics Transceiver	U0100	-	○	○
	Inner Rear View Mirror Assembly	-	-	-	-
	Parking Assist ECU12	U0100	-	○	○
		U0126	-	○	-
		U0129	-	○	-
		U0140	-	○	-
		U1110	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	-	-	○
		U0101	-	-	○
		U0126	-	-	-
		U0129	-	-	-
		U0142	-	-	-
		U0155	○	○	-
Sub Bus 1	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-	-
		U1002	-	-	-
		U0230	-	-	-
		U0208	-	-	-
		U0199	-	-	-
		U0200	-	-	-
		U0201	-	-	-
		U0202	-	-	-
		U024A	-	-	-
	Back Door Motor Unit	-	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	-	-
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	-	-	-
	Slide Door Motor Unit LH	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-
	Room Light Control Relay	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
If an open in a CAN main bus line, a short between the CAN bus lines (CANH and CANL) or a +B or ground short in the CAN bus occurs, DTCs of almost all ECUs (or sensors) on the CAN bus may be output, or a message indicating a communication error may be displayed on the GTS screen. In this case, check the resistance of the CAN bus (steps 7 to 9) first.

Click here
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

-			Trouble Mode (CAN Bus Lines Short Circuit or Short to GND)
-			V Bus
Output ECU		Output DTC	CANH to CANL	CANH Short to Ground	CANL Short to Ground
V Bus	Airbag ECU Assembly	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	○	○	○
		U0131	○	○	○
		U0142	○	○	○
		U0155	○	○	○
		U0163	○	○	○
	Navigation Receiver Assembly*1	U0100	○	○	○
		U0129	○	○	○
		U0140	○	○	○
		U0155	○	○	○
		U1110	○	○	○
	Radio and Display Receiver Assembly*1	U0100	○	○	○
		U0129	○	○	○
		U0140	○	○	○
		U0155	○	○	○
		U1110	○	○	○
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	○	○	○
		U0101	○	○	○
		U0120	○	○	○
		U0129	○	○	○
		U0151	○	○	○
		U0155	○	○	○
		U023A	○	○	○
		U0327	○	○	○
		U1106	○	○	○
		U1117	○	○	○
	Network Gateway ECU	-	-	-	-
	Clearance Warning ECU Assembly	U0101	○	○	○
		U0129	○	○	○
		U0155	○	○	○
	ECM (Cruise Control System)	U0122	○	○	○
	Parking Brake ECU Assembly*1	U0100	○	○	○
		U0124	○	○	○
		U0129	○	○	○
	Power Steering ECU Assembly	U0100	○	○	○
	Power Steering ECU Assembly	U0129	○	○	○
	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	○	○	○
		U0142	○	○	○
		U0155	○	○	○
		U1117	○	○	○
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	○	○	○
		U0140	○	○	○
		U0155	○	○	○
		U1117	○	○	○
V Bus	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	○	○	○
	Combination Meter Assembly	U0100	○	○	○
		U0129	○	○	○
		U0131	○	○	○
		U0142	○	○	○
		U0151	○	○	○
		U0163	○	○	○
		U0182	○	○	○
	Steering Sensor	-	-	-	-
	DLC3	-	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	○	○	○
		U0124	○	○	○
		U0126	○	○	○
		U0128	○	○	○
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-	-
		U023B	-	-	-
		U1002	-	-	-
	Telematics Transceiver	U0100	○	○	○
	Inner Rear View Mirror Assembly	-	-	-	-
	Parking Assist ECU12	U0100	○	○	○
		U0126	○	○	○
		U0129	○	○	○
		U0140	○	○	○
		U1110	○	○	○
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	○	○	○
		U0101	○	○	○
		U0126	○	○	○
		U0129	○	○	○
		U0142	-	-	-
		U0155	○	○	○
	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-	-
		U1002	-	-	-
		U0230	-	-	-
		U0208	-	-	-
		U0199	-	-	-
		U0200	-	-	-
		U0201	-	-	-
		U0202	-	-	-
		U024A	-	-	-
	Back Door Motor Unit	-	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	-	-
Sub Bus 1	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	-	-	-
	Slide Door Motor Unit LH	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-
	Room Light Control Relay	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
If an open in a CAN bus line, a short between the CAN bus lines (CANH and CANL) or a +B or ground short in the CAN bus occurs, DTCs of almost all ECUs (or sensors) on the CAN bus may be output, or a message indicating a communication error may be displayed on the GTS screen. In this case, check the resistance of the CAN bus (steps 7 to 9) first.

Click here
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

DTC COMBINATION TABLE (OPEN OR SHORT SUB BUS 1, PAST COMMUNICATION ERROR)

Regarding a past communication error of an ECU and sensor connected to sub bus 1 (in this case, normal is displayed when performing the CAN bus check, but communication DTCs are output), determine the part that had a malfunction based on DTCs output from the main body ECU (multiplex network body ECU).

Tech Tips

As gateway function equipped ECUs (sub bus monitor ECUs) monitor signals from all ECUs that are connected to sub buses, gateway function equipped ECUs can detect ECUs with a communication stop more accurately.
DTCs output from ECUs other than the main body ECU (multiplex network body ECU) (gateway function equipped ECU) are shown only as a reference.
Regarding a communication stop that is currently occurring in sub bus 1, the malfunctioning part can be confirmed easily by performing the CAN bus check using the GTS.
If an open occurs in just one of the lines of a CAN bus line(s), DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.

-			Trouble Mode (Open in Both CAN Branch Lines)
-			Sub Bus 1
Output ECU		Output DTC	Back Door Motor Unit Click here	Outer Mirror Control ECU Assembly (for Driver Side) Click here	Outer Mirror Control ECU Assembly (for Front Passenger Side) Click here	Slide Door Motor Unit LH Click here
V Bus	Airbag ECU Assembly	-	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	-	-	-
		U0131	-	-	-	-
		U0142	-	-	-	-
		U0155	-	-	-	-
		U0163	-	-	-	-
	Navigation Receiver Assembly*1	U0100	-	-	-	-
		U0129	-	-	-	-
		U0140	-	-	-	-
		U0155	-	-	-	-
		U1110	-	-	-	-
	Radio and Display Receiver Assembly*1	U0100	-	-	-	-
		U0129	-	-	-	-
		U0140	-	-	-	-
		U0155	-	-	-	-
		U1110	-	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-	-	-
		U0101	-	-	-	-
		U0120	-	-	-	-
		U0129	-	-	-	-
		U0151	-	-	-	-
		U0155	-	-	-	-
		U023A	-	-	-	-
		U0327	-	-	-	-
		U1106	-	-	-	-
		U1117	-	-	-	-
	Network Gateway ECU	-	-	-	-	-
	Clearance Warning ECU Assembly	U0101	-	-	-	-
		U0129	-	-	-	-
		U0155	-	-	-	-
	ECM (Cruise Control System)	U0122	-	-	-	-
	Parking Brake ECU Assembly*1	U0100	-	-	-	-
		U0124	-	-	-	-
		U0129	-	-	-	-
	Power Steering ECU Assembly	U0100	-	-	-	-
	Power Steering ECU Assembly	U0129	-	-	-	-
V Bus	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	-	-	-
		U0142	-	-	-	-
		U0155	-	-	-	-
		U1117	-	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	-	-	-
		U0140	-	-	-	-
		U0155	-	-	-	-
		U1117	-	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	-	-	-
	Combination Meter Assembly	U0100	-	-	-	-
		U0129	-	-	-	-
		U0131	-	-	-	-
		U0142	-	-	-	-
		U0151	-	-	-	-
		U0163	-	-	-	-
		U0182	-	-	-	-
	Steering Sensor	-	-	-	-	-
	DLC3	-	-	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-	-	-
		U0124	-	-	-	-
		U0126	-	-	-	-
		U0128	-	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-	-	-
		U023B	-	-	-	-
		U1002	-	-	-	-
	Telematics Transceiver	U0100	-	-	-	-
	Inner Rear View Mirror Assembly	-	-	-	-	-
	Parking Assist ECU12	U0100	-	-	-	-
		U0126	-	-	-	-
		U0129	-	-	-	-
		U0140	-	-	-	-
		U1110	-	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	-	-	-	-
		U0101	-	-	-	-
		U0126	-	-	-	-
		U0129	-	-	-	-
		U0142	-	-	-	-
		U0155	-	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-	-	-
		U1002	-	-	-	-
		U0230	○	-	-	-
		U0208	-	-	-	-
		U0199	-	-	○	-
		U0200	-	○	-	-
		U0201	-	-	-	-
		U0202	-	-	-	○
		U024A	-	-	-	-
	Back Door Motor Unit	-	-	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	○	-	○
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	-	-	○	-
	Slide Door Motor Unit LH	-	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-	-
	Room Light Control Relay	-	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

-			Trouble Mode (Open in Both CAN Branch Lines)
-			Sub Bus 1
Output ECU		Output DTC	Slide Door Motor Unit RH Click here	Front Power Seat Switch LH Click here	Room Light Control Relay Click here
V Bus	Airbag ECU Assembly	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	-	-
		U0131	-	-	-
		U0142	-	-	-
		U0155	-	-	-
		U0163	-	-	-
	Navigation Receiver Assembly*1	U0100	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1110	-	-	-
	Radio and Display Receiver Assembly*1	U0100	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1110	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-	-
		U0101	-	-	-
		U0120	-	-	-
		U0129	-	-	-
		U0151	-	-	-
		U0155	-	-	-
		U023A	-	-	-
		U0327	-	-	-
		U1106	-	-	-
		U1117	-	-	-
	Network Gateway ECU	-	-	-	-
	Clearance Warning ECU Assembly	U0101	-	-	-
		U0129	-	-	-
		U0155	-	-	-
	ECM (Cruise Control System)	U0122	-	-	-
	Parking Brake ECU Assembly*1	U0100	-	-	-
		U0124	-	-	-
		U0129	-	-	-
	Power Steering ECU Assembly	U0100	-	-	-
	Power Steering ECU Assembly	U0129	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	-	-
		U0142	-	-	-
		U0155	-	-	-
		U1117	-	-	-
V Bus	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1117	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	-	-
	Combination Meter Assembly	U0100	-	-	-
		U0129	-	-	-
		U0131	-	-	-
		U0142	-	-	-
		U0151	-	-	-
		U0163	-	-	-
		U0182	-	-	-
	Steering Sensor	-	-	-	-
	DLC3	-	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-	-
		U0124	-	-	-
		U0126	-	-	-
		U0128	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-	-
		U023B	-	-	-
		U1002	-	-	-
	Telematics Transceiver	U0100	-	-	-
	Inner Rear View Mirror Assembly	-	-	-	-
	Parking Assist ECU12	U0100	-	-	-
		U0126	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U1110	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	-	-	-
		U0101	-	-	-
		U0126	-	-	-
		U0129	-	-	-
		U0142	-	-	-
		U0155	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-	-
		U1002	-	-	-
		U0230	-	-	-
		U0208	-	○	-
		U0199	-	-	-
		U0200	-	-	-
		U0201	○	-	-
		U0202	-	-	-
		U024A	-	-	○
	Back Door Motor Unit	-	-	-	-
Sub Bus 1	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	-	-
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	○	-	-
	Slide Door Motor Unit LH	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-
	Room Light Control Relay	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

-			Trouble Mode (Open in Both CAN Main Bus Lines)
-			Sub Bus 1
Output ECU		Output DTC	Main Body ECU (Multiplex Network Body ECU) Click here	No. 5 CAN Junction Connector to No. 1 CAN Junction Connector	Headlight Light Control ECU Sub-assembly LH Click here
V Bus	Airbag ECU Assembly	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	-	-
		U0131	-	-	-
		U0142	-	-	-
		U0155	-	-	-
		U0163	-	-	-
	Navigation Receiver Assembly*1	U0100	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1110	-	-	-
	Radio and Display Receiver Assembly*1	U0100	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1110	-	-	-
V Bus	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-	-
		U0101	-	-	-
		U0120	-	-	-
		U0129	-	-	-
		U0151	-	-	-
		U0155	-	-	-
		U023A	-	-	-
		U0327	-	-	-
		U1106	-	-	-
		U1117	-	-	-
	Network Gateway ECU	-	-	-	-
	Clearance Warning ECU Assembly	U0101	-	-	-
		U0129	-	-	-
		U0155	-	-	-
	ECM (Cruise Control System)	U0122	-	-	-
	Parking Brake ECU Assembly*1	U0100	-	-	-
		U0124	-	-	-
		U0129	-	-	-
	Power Steering ECU Assembly	U0100	-	-	-
	Power Steering ECU Assembly	U0129	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	-	-
		U0142	-	-	-
		U0155	-	-	-
		U1117	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1117	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	-	-
	Combination Meter Assembly	U0100	-	-	-
		U0129	-	-	-
		U0131	-	-	-
		U0142	-	-	-
		U0151	-	-	-
		U0163	-	-	-
		U0182	○	○	○
	Steering Sensor	-	-	-	-
	DLC3	-	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-	-
		U0124	-	-	-
		U0126	-	-	-
		U0128	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-	-
		U023B	-	-	-
		U1002	-	-	-
	Telematics Transceiver	U0100	-	-	-
Sub Bus 2	Inner Rear View Mirror Assembly	-	-	-	-
	Parking Assist ECU12	U0100	-	-	-
		U0126	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U1110	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	○	○	○
		U0101	○	○	○
		U0126	○	○	○
		U0129	○	○	○
		U0142	○	○	○
		U0155	○	○	○
	Main Body ECU (Multiplex Network Body ECU)*3	U0182	○	○	○
		U1002	○	-	-
		U0230	○	-	-
		U0208	○	-	-
		U0199	○	-	-
		U0200	○	○	-
		U0201	○	○	-
		U0202	○	-	-
		U024A	○	-	-
	Back Door Motor Unit	-	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	○	-	-
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	○	○	-
	Slide Door Motor Unit LH	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-
	Room Light Control Relay	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

-			Trouble Mode (CAN Bus Lines Short Circuit or Short to GND)
-			Sub Bus 1
Output ECU		Output DTC	CANH to CANL	CANH Short to Ground	CANL Short to Ground
V Bus	Airbag ECU Assembly	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	-	-
		U0131	-	-	-
		U0142	-	-	-
		U0155	-	-	-
		U0163	-	-	-
	Navigation Receiver Assembly*1	U0100	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1110	-	-	-
	Radio and Display Receiver Assembly*1	U0100	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1110	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-	-
		U0101	-	-	-
		U0120	-	-	-
		U0129	-	-	-
		U0151	-	-	-
		U0155	-	-	-
		U023A	-	-	-
		U0327	-	-	-
		U1106	-	-	-
		U1117	-	-	-
	Network Gateway ECU	-	-	-	-
	Clearance Warning ECU Assembly	U0101	-	-	-
		U0129	-	-	-
		U0155	-	-	-
	ECM (Cruise Control System)	U0122	-	-	-
	Parking Brake ECU Assembly*1	U0100	-	-	-
		U0124	-	-	-
		U0129	-	-	-
	Power Steering ECU Assembly	U0100	-	-	-
	Power Steering ECU Assembly	U0129	-	-	-
V Bus	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	-	-
		U0142	-	-	-
		U0155	-	-	-
		U1117	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1117	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	-	-
	Combination Meter Assembly	U0100	-	-	-
		U0129	-	-	-
		U0131	-	-	-
		U0142	-	-	-
		U0151	-	-	-
		U0163	-	-	-
		U0182	○	○	○
	Steering Sensor	-	-	-	-
	DLC3	-	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-	-
		U0124	-	-	-
		U0126	-	-	-
		U0128	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-	-
		U023B	-	-	-
		U1002	-	-	-
	Telematics Transceiver	U0100	-	-	-
	Inner Rear View Mirror Assembly	-	-	-	-
	Parking Assist ECU12	U0100	-	-	-
		U0126	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U1110	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	○	○	○
		U0101	○	○	○
		U0126	○	○	○
		U0129	○	○	○
		U0142	○	○	○
		U0155	○	○	○
Sub Bus 1	Main Body ECU (Multiplex Network Body ECU)*3	U0182	○	○	○
		U1002	○	○	○
		U0230	○	○	○
		U0208	○	○	○
		U0199	○	○	○
		U0200	○	○	○
		U0201	○	○	○
		U0202	○	○	○
		U024A	○	○	○
	Back Door Motor Unit	-	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	○	○	○
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	○	○	○
	Slide Door Motor Unit LH	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-
	Room Light Control Relay	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
If an open in a CAN bus line, a short between the CAN bus lines (CANH and CANL) or a +B or ground short in the CAN bus occurs, DTCs of almost all ECUs (or sensors) on the CAN bus may be output, or a message indicating a communication error may be displayed on the GTS screen. In this case, check the resistance of the CAN bus (steps 7 to 9) first.

Click here
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

DTC COMBINATION TABLE (OPEN OR SHORT SUB BUS 2, PAST COMMUNICATION ERROR)

Regarding a past communication error of an ECU and sensor connected to sub bus 2 (in this case, normal is displayed when performing the CAN bus check, but communication DTCs are output), determine the part that had a malfunction based on DTCs output from the network gateway ECU.
Tech Tips
- As gateway function equipped ECUs (sub bus monitor ECUs) monitor signals from all ECUs that are connected to sub buses, gateway function equipped ECUs can detect ECUs with a communication stop more accurately.
- DTCs output from ECUs other than the network gateway ECU (gateway function equipped ECU) are shown only as a reference.
- Regarding a communication stop that is currently occurring in sub bus 2, the malfunctioning part can be confirmed easily by performing the CAN bus check using the GTS.
- If an open occurs in just one of the lines of a CAN branch, DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.

-			Trouble Mode (Open in Both CAN Branch Lines)
-			Sub Bus 2
Output ECU		Output DTC	Telematics Transceiver Click here	Inner Rear View Mirror Assembly Click here	Parking Assist ECU Click here	Option Connector (Bus Buffer ECU) Click here
V Bus	Airbag ECU Assembly	-	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	-	-	-
		U0131	-	-	-	-
		U0142	-	-	-	-
		U0155	-	-	-	-
		U0163	-	-	-	-
	Navigation Receiver Assembly*1	U0100	-	-	-	-
		U0129	-	-	-	-
		U0140	-	-	-	-
		U0155	-	-	-	-
		U1110	-	-	-	-
	Radio and Display Receiver Assembly*1	U0100	-	-	-	-
		U0129	-	-	-	-
		U0140	-	-	-	-
		U0155	-	-	-	-
		U1110	-	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-	-	-
		U0101	-	-	-	-
		U0120	-	-	-	-
		U0129	-	-	-	-
		U0151	-	-	-	-
		U0155	-	-	-	-
		U023A	-	-	-	-
		U0327	-	-	-	-
		U1106	-	-	-	-
		U1117	-	-	-	○
	Network Gateway ECU	-	-	-	-	-
	Clearance Warning ECU Assembly	U0101	-	-	-	-
		U0129	-	-	-	-
		U0155	-	-	-	-
	ECM (Cruise Control System)	U0122	-	-	-	-
V Bus	Parking Brake ECU Assembly*1	U0100	-	-	-	-
		U0124	-	-	-	-
		U0129	-	-	-	-
	Power Steering ECU Assembly	U0100	-	-	-	-
	Power Steering ECU Assembly	U0129	-	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	-	-	-
		U0142	-	-	-	-
		U0155	-	-	-	-
		U1117	-	-	-	○
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	-	-	-
		U0140	-	-	-	-
		U0155	-	-	-	-
		U1117	-	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	-	-	-
	Combination Meter Assembly	U0100	-	-	-	-
		U0129	-	-	-	-
		U0131	-	-	-	-
		U0142	-	-	-	-
		U0151	-	-	-	-
		U0163	-	-	-	-
		U0182	-	-	-	-
	Steering Sensor	-	-	-	-	-
	DLC3	-	-	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-	-	-
		U0124	-	-	-	-
		U0126	-	-	-	-
		U0128	-	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	-	-	-	-
		U023B	-	-	-	-
		U1002	-	-	-	-
	Telematics Transceiver	U0100	○	-	-	-
	Inner Rear View Mirror Assembly	-	-	-	-	-
	Parking Assist ECU12	U0100	-	-	○	-
		U0126	-	-	○	-
		U0129	-	-	○	-
		U0140	-	-	○	-
		U1110	-	-	○	-
	Option Connector (Bus Buffer ECU)	-	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	-	-	-	-
		U0101	-	-	-	-
		U0126	-	-	-	-
		U0129	-	-	-	-
		U0142	-	-	-	-
		U0155	-	-	-	-
Sub Bus 1	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-	-	-
		U1002	-	-	-	-
		U0230	-	-	-	-
		U0208	-	-	-	-
		U0199	-	-	-	-
		U0200	-	-	-	-
		U0201	-	-	-	-
		U0202	-	-	-	-
		U024A	-	-	-	-
	Back Door Motor Unit	-	-	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	-	-	-
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	-	-	-	-
	Slide Door Motor Unit LH	-	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-	-
	Room Light Control Relay	-	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

-			Trouble Mode (Open in Both CAN Main Bus Lines)
-			Sub Bus 2
Output ECU		Output DTC	Network Gateway ECU Click here	No. 2 CAN Junction Connector to No. 2 CAN Junction Terminal
V Bus	Airbag ECU Assembly	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	-
		U0131	-	-
		U0142	-	-
		U0155	-	-
		U0163	-	-
	Navigation Receiver Assembly*1	U0100	-	-
		U0129	-	-
		U0140	-	-
		U0155	-	-
		U1110	-	-
	Radio and Display Receiver Assembly*1	U0100	-	-
		U0129	-	-
		U0140	-	-
		U0155	-	-
		U1110	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-
		U0101	-	-
		U0120	-	-
		U0129	-	-
		U0151	-	-
		U0155	-	-
		U023A	○	-
		U0327	-	-
		U1106	-	-
		U1117	○	-
	Network Gateway ECU	-	-	-
	Clearance Warning ECU Assembly	U0101	-	-
		U0129	-	-
		U0155	-	-
V Bus	ECM (Cruise Control System)	U0122	-	-
	Parking Brake ECU Assembly*1	U0100	-	-
		U0124	-	-
		U0129	-	-
	Power Steering ECU Assembly	U0100	-	-
	Power Steering ECU Assembly	U0129	-	-
	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	-
		U0142	-	-
		U0155	-	-
		U1117	○	-
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	-
		U0140	-	-
		U0155	-	-
		U1117	○	-
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	-
	Combination Meter Assembly	U0100	-	-
		U0129	-	-
		U0131	-	-
		U0142	-	-
		U0151	-	-
		U0163	-	-
		U0182	-	-
	Steering Sensor	-	-	-
	DLC3	-	-	-
	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-
		U0124	-	-
		U0126	-	-
		U0128	-	-
	Option Connector (Bus Buffer ECU)	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	○	-
		U023B	○	-
		U1002	○	-
	Telematics Transceiver	U0100	○	-
	Inner Rear View Mirror Assembly	-	-	-
	Parking Assist ECU12	U0100	○	-
		U0126	○	-
		U0129	○	-
		U0140	○	-
		U1110	○	-
	Option Connector (Bus Buffer ECU)	-	○	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	-	-
		U0101	-	-
		U0126	-	-
		U0129	-	-
		U0142	-	-
		U0155	-	-
Sub Bus 1	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-
		U1002	-	-
		U0230	-	-
		U0208	-	-
		U0199	-	-
		U0200	-	-
		U0201	-	-
		U0202	-	-
		U024A	-	-
	Back Door Motor Unit	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	-
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	-	-
	Slide Door Motor Unit LH	-	-	-
	Slide Door Motor Unit RH	-	-	-
	Front Power Seat Switch LH	-	-	-
	Room Light Control Relay	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
If an open occurs in just one of the lines of a CAN main, DTCs which are not related to malfunctioning parts may be output (DTCs may be displayed randomly), or a message indicating a communication error may be displayed.
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

-			Trouble Mode (CAN Bus Lines Short Circuit or Short to GND)
-			Sub Bus 2
Output ECU		Output DTC	CANH to CANL	CANH Short to Ground	CANL Short to Ground
V Bus	Airbag ECU Assembly	-	-	-	-
	Air Conditioning Amplifier Assembly	U0100	-	-	-
		U0131	-	-	-
		U0142	-	-	-
		U0155	-	-	-
		U0163	-	-	-
V Bus	Navigation Receiver Assembly*1	U0100	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1110	-	-	-
	Radio and Display Receiver Assembly*1	U0100	-	-	-
		U0129	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1110	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0100	-	-	-
		U0101	-	-	-
		U0120	-	-	-
		U0129	-	-	-
		U0151	-	-	-
		U0155	-	-	-
		U023A	○	○	○
		U0327	-	-	-
		U1106	-	-	-
		U1117	○	○	○
	Network Gateway ECU	-	-	-	-
	Clearance Warning ECU Assembly	U0101	-	-	-
		U0129	-	-	-
		U0155	-	-	-
	ECM (Cruise Control System)	U0122	-	-	-
	Parking Brake ECU Assembly*1	U0100	-	-	-
		U0124	-	-	-
		U0129	-	-	-
	Power Steering ECU Assembly	U0100	-	-	-
	Power Steering ECU Assembly	U0129	-	-	-
	Certification ECU (Smart Key ECU Assembly) (Power source switching function)	U0100	-	-	-
		U0142	-	-	-
		U0155	-	-	-
		U1117	○	○	○
	Certification ECU (Smart Key ECU Assembly) (Entry function)	U0100	-	-	-
		U0140	-	-	-
		U0155	-	-	-
		U1117	○	○	○
	Certification ECU (Smart Key ECU Assembly) (Start function)	U0100	-	-	-
	Combination Meter Assembly	U0100	-	-	-
		U0129	-	-	-
		U0131	-	-	-
		U0142	-	-	-
		U0151	-	-	-
		U0163	-	-	-
		U0182	-	-	-
	Steering Sensor	-	-	-	-
	DLC3	-	-	-	-
V Bus	Skid Control ECU (Brake Actuator Assembly)*1	U0100	-	-	-
		U0124	-	-	-
		U0126	-	-	-
		U0128	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 2	Network Gateway ECU*3	U023A	○	○	○
		U023B	○	○	○
		U1002	○	○	○
	Telematics Transceiver	U0100	-	-	-
	Inner Rear View Mirror Assembly	-	-	-	-
	Parking Assist ECU12	U0100	○	○	○
		U0126	○	○	○
		U0129	○	○	○
		U0140	○	○	○
		U1110	-	-	-
	Option Connector (Bus Buffer ECU)	-	-	-	-
Sub Bus 1	Headlight Light Control ECU Sub-assembly LH12	U0100	-	-	-
		U0101	-	-	-
		U0126	-	-	-
		U0129	-	-	-
		U0142	-	-	-
		U0155	-	-	-
	Main Body ECU (Multiplex Network Body ECU)*3	U0182	-	-	-
		U1002	-	-	-
		U0230	-	-	-
		U0208	-	-	-
		U0199	-	-	-
		U0200	-	-	-
		U0201	-	-	-
		U0202	-	-	-
		U024A	-	-	-
	Back Door Motor Unit	-	-	-	-
	Outer Mirror Control ECU Assembly (for Driver Side)	U0142	-	-	-
	Outer Mirror Control ECU Assembly (for Front Passenger Side)	U0142	-	-	-
	Slide Door Motor Unit LH	-	-	-	-
	Slide Door Motor Unit RH	-	-	-	-
	Front Power Seat Switch LH	-	-	-	-
	Room Light Control Relay	-	-	-	-

Tech Tips

○: DTC is output.
-: DTC is not output.
If an open in a CAN bus line, a short between the CAN bus lines (CANH and CANL) or a +B or ground short in the CAN bus occurs, DTCs of almost all ECUs (or sensors) on the CAN bus may be output, or a message indicating a communication error may be displayed on the GTS screen. In this case, check the resistance of the CAN bus (steps 7 to 9) first.

Click here
*1: DTC U0073 may be stored when communication is lost.
*2: DTC U1000 may be stored when communication is lost.
*3: Gateway function equipped ECUs relay signals between the ECUs connected to the different buses.

CAN BUS WAVEFORMS

Tech Tips

This waveform is measured between terminals CANH and GND, and terminals CANL and GND of the DLC3. (Use this as a reference for diagnosis of CAN communication lines.)
When malfunctions in multiple ECUs are suspected based on the CAN bus check and DTCs checked using the GTS, check the resistance of the CAN bus using an ohmmeter first. If no problems are found, check the following waveforms.

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If a waveform is not similar to one of the following 3 patterns (Group 1), then an open in a CAN main bus line, an open in a CAN branch line, or a short between a CAN line (CANH or CANL) and ground is suspected (Group 2).
Wiggle the connector and wire harness to check if the waveform changes.

CAN bus waveforms (Group 1)


*a	1 V/DIV.
*b	50 μs/DIV.

Normal waveform


*a	1 V/DIV.
*b	50 μs/DIV.

Open in both of the lines (CANH and CANL) of a CAN branch

Tech Tips

Waveforms (waveforms shown using dotted lines) are not present from an ECU or sensor connected to a CAN branch with an open circuit in both lines. (Waveforms from other ECUs or sensors are normal.)
Because this waveform is similar to a normal waveform, instead of using the waveform, the malfunctioning part can be narrowed down by performing a CAN bus check.


*a	1 V/DIV.
*b	50 μs/DIV.

Short between the CAN bus lines (CANH and CANL)

Tech Tips

Waveforms disappear.
If the malfunction is in an ECU, disconnecting the ECU will change the waveform. If the waveform does not change, a malfunction in the wire harness is suspected.

CAN bus waveforms (reference) (Group 2)

Note

The following CAN bus waveforms can be used only as reference. The actual measured waveform may differ significantly depending on the location of the open or short circuit.


*a	1 V/DIV.
*b	50 μs/DIV.

Open in a CAN branch line (CANH)

Tech Tips

An abnormal waveform is output from an ECU with an open in one of its CAN branch lines. Because this abnormal output interferes with the signals from other ECUs, the output of other ECUs will also appear abnormal.
Narrow down the malfunctioning part by checking DTCs or performing a CAN bus check, or by checking waveform changes when ECUs or sensors are disconnected. The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.


*a	1 V/DIV.
*b	50 μs/DIV.

Open in a CAN branch line (CANL)

Tech Tips

An abnormal waveform is output from an ECU with an open in one of its CAN branch lines. Because this abnormal output interferes with the signals from other ECUs, the output of other ECUs will also appear abnormal.
Narrow down the malfunctioning part by checking DTCs or performing a CAN bus check, or by checking waveform changes when ECUs or sensors are disconnected. The waveform will change to one for an open in both sides of a CAN branch when the ECU or sensor with an open CAN branch line is disconnected.


*a	1 V/DIV.
*b	50 μs/DIV.

Open in a CAN main bus line (CANH)

Tech Tips

Waveforms of ECUs or sensors that are closer to the DLC3 than the open part are almost normal.
Waveforms of ECUs or sensors that are on the opposite side of the DLC3 from the open part are abnormal.
An open in a CAN main bus line can be confirmed by measuring the resistance between the CANH and CANL terminals of any CAN branch.


*a	1 V/DIV.
*b	50 μs/DIV.

Short between a CAN bus line (CANH) and ground

Tech Tips

Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connectors or when disconnecting ECUs or sensors.
A short to ground in the CANH line can be confirmed by measuring the resistance between CANH and ground using an ohmmeter.


*a	1 V/DIV.
*b	50 μs/DIV.

Short between a CAN bus line (CANL) and ground

Tech Tips

Narrow down the shorted part by checking for waveform changes when disconnecting connectors from the CAN junction connectors or when disconnecting ECUs or sensors.
A short to ground in the CANL line can be confirmed by measuring the resistance between CANL and ground using an ohmmeter.

DATA SENDING/RECEIVING TABLE

Data sending/receiving table

Tech Tips

If Data List items related to sent/received data are not displayed properly, the part for which communication is interrupted can be determined using the table below.

Data content	Data Detected and Sent by	Data Received by (Can be Checked in the Data List)	Data Received by (Cannot be Checked in the Data List)	Relevant Data List Item [Selected System]
Accelerator position	ECM	Skid control ECU (brake actuator assembly)	Navigation receiver assembly (for Navigation Receiver Type) Radio and display receiver assembly (for Radio and Display Type) Parking brake ECU assembly	Accelerator Position [Engine] Accelerator Opening Angle % [ABS/VSC/TRC]
Engine speed	ECM	Skid control ECU (brake actuator assembly) Power steering ECU assembly Certification ECU (smart key ECU assembly) Combination meter assembly	Air conditioning amplifier assembly Airbag ECU assembly Navigation receiver assembly (for Navigation Receiver Type) Radio and display receiver assembly (for Radio and Display Type) Main body ECU (multiplex network body ECU) Parking brake ECU assembly Option connector (bus buffer ECU)	Engine Speed [Engine] Engine Revolutions [ABS/VSC/TRC] Engine Revolution [EMPS] Engine Condition [Power Source Control] Engine Speed [Starting Control] Engine Rpm [Combination Meter]
Engine coolant temperature	ECM	Air conditioning amplifier assembly Combination meter assembly	Navigation receiver assembly (for Navigation Receiver Type) Radio and display receiver assembly (for Radio and Display Type) Certification ECU (smart key ECU assembly)	Coolant Temp [Engine] Engine Coolant Temp [Air Conditioner] Coolant Temperature [Combination Meter]
Vehicle speed	Skid control ECU (brake actuator assembly)	ECM Power steering ECU assembly Combination meter assembly Navigation receiver assembly (for Navigation Receiver Type) Radio and display receiver assembly (for Radio and Display Type) Parking brake ECU assembly	Clearance warning ECU assembly Airbag ECU assembly Parking assist ECU	Vehicle Speed [ABS/VSC/TRC] Vehicle Speed [Engine] Meter Vehicle Velocity [EMPS] Vehicle Speed Meter [Combination Meter] Vehicle Speed [Navigation System] Vehicle Speed [Electric Parking Brake]
Vehicle speed	Combination meter assembly*3	Front power seat switch LH	Air conditioning amplifier assembly Main body ECU (multiplex network body ECU) Option connector (bus buffer ECU) Certification ECU (smart key ECU assembly) Back door motor unit Slide door motor unit RH Slide door motor unit LH	Vehicle Speed Meter [Combination Meter] Vehicle Speed [Driver Seat]
Wheel speed	Skid control ECU (brake actuator assembly)	Headlight light control ECU sub-assembly LH Parking brake ECU assembly	ECM Power steering ECU assembly Clearance warning ECU assembly Airbag ECU assembly Inner rear view mirror assembly Parking assist ECU	FR Wheel Speed [ABS/VSC/TRC] FL Wheel Speed [ABS/VSC/TRC] RR Wheel Speed [ABS/VSC/TRC] RL Wheel Speed [ABS/VSC/TRC] Front Right Wheel Speed Value [HL AutoLeveling] Front Left Wheel Speed Value [HL AutoLeveling] FR Wheel Speed [Electric Parking Brake] FL Wheel Speed [Electric Parking Brake] RR Wheel Speed [Electric Parking Brake] RL Wheel Speed [Electric Parking Brake]
Shift position	ECM	Navigation receiver assembly (for Navigation Receiver Type) Radio and display receiver assembly (for Radio and Display Type) Clearance warning ECU assembly Certification ECU (smart key ECU assembly) Parking brake ECU assembly Front power seat switch LH	Inner rear view mirror assembly Parking assist ECU Combination meter assembly*2 Back door motor unit Airbag ECU assembly Main body ECU (multiplex network body ECU) Option connector (bus buffer ECU) Slide door motor unit LH Slide door motor unit RH Headlight light control ECU sub-assembly LH	Neutral Position SW Signal [Engine] Reverse Signal [Navigation System] Parking Signal [Clearance Sonar] Reverse Signal [Clearance Sonar] Shift P Signal [Power Source Control] P Position [Electric Parking Brake] P Switch [Driver Seat]
Ambient temperature	Air conditioning amplifier assembly	Combination meter assembly Parking brake ECU assembly	Navigation receiver assembly (for Navigation Receiver Type) Radio and display receiver assembly (for Radio and Display Type) Option connector (bus buffer ECU) ECM Clearance warning ECU assembly	Ambient Temp Sensor [Air Conditioner] Ambient Temperature [Combination Meter] Ambient Temperature [Electric Parking Brake]
Driver door courtesy switch	Main body ECU (multiplex network body ECU)	-	Certification ECU (smart key ECU assembly) Combination meter assembly*2 Navigation receiver assembly (for Navigation Receiver Type) Radio and display receiver assembly (for Radio and Display Type) Parking brake ECU assembly Option connector (bus buffer ECU) Skid control ECU (brake actuator assembly) Parking assist ECU	FL Door Courtesy SW [Main Body]
Steering angle sensor	Steering sensor	Skid control ECU (brake actuator assembly) Power steering ECU assembly	Parking assist ECU Navigation receiver assembly (for Navigation Receiver Type) Radio and display receiver assembly (for Radio and Display Type) Combination meter assembly ECM Headlight light control ECU sub-assembly LH Airbag ECU assembly	Steering Angle Sensor [ABS/VSC/TRC] Steering Angle Velocity [EMPS]
Yaw rate sensor	Airbag ECU assembly	Skid control ECU (brake actuator assembly)	Power steering ECU assembly Inner rear view mirror assembly	Yaw Rate Sensor [ABS/VSC/TRC]
Acceleration sensor	Airbag ECU assembly	Skid control ECU (brake actuator assembly) Parking brake ECU assembly	ECM Power steering ECU assembly Combination meter assembly	Deceleration Sensor [ABS/VSC/TRC] Deceleration Sensor 2 [ABS/VSC/TRC] Deceleration Sensor 1 [Electric Parking Brake] Deceleration Sensor 2 [Electric Parking Brake]
Ignition switch condition	Main body ECU (multiplex network body ECU)	Front power seat switch LH Back door motor unit Parking brake ECU assembly	Certification ECU (smart key ECU assembly) Outer mirror control ECU assembly (for driver side) Outer mirror control ECU assembly (for front passenger side) Option connector (bus buffer ECU) Headlight light control ECU sub-assembly LH Room light control relay Slide door motor unit LH Slide door motor unit RH Combination meter assembly	IG SW [Main Body] Ignition Switch [Driver Seat] IG SW [Back Door] IG Status [Electric Parking Brake]
Stop light switch signal	Skid control ECU (brake actuator assembly)	Certification ECU (smart key ECU assembly)	Slide door motor unit LH Slide door motor unit RH Airbag ECU assembly Navigation receiver assembly (for Navigation Receiver Type) Radio and display receiver assembly (for Radio and Display Type) Parking brake ECU assembly Combination meter assembly Option connector (bus buffer ECU)	Stop Light SW [ABS/VSC/TRC] Stop Light Switch1 [Power Source Control]
Headlight switch	Main body ECU (multiplex network body ECU)	Headlight light control ECU sub-assembly LH	Air conditioning amplifier assembly Combination meter assembly*2	Dimmer SW [Main Body] Headlight High Beam State [HL AutoLeveling]
ECM power source voltage*1	ECM	-	-	Battery Voltage [Engine]
Combination meter assembly power source voltage*1	Combination meter assembly	-	-	+B Voltage Value [Combination Meter]
Power steering ECU assembly power source voltage*1	Power steering ECU assembly	-	-	IG Power Supply [EMPS]
Parking brake ECU assembly power source voltage*1	Parking brake ECU assembly	-	-	ECU Voltage Monitor [Electric Parking Brake]
Navigation receiver assembly power source voltage (for Navigation Receiver Type)1 Radio and display receiver assembly power source voltage (for Radio and Display Type)1	Navigation receiver assembly (for Navigation Receiver Type) Radio and display receiver assembly (for Radio and Display Type)	-	-	Battery Voltage [Navigation System]
Headlight light control ECU sub-assembly LH power source voltage*1	Headlight light control ECU sub-assembly LH	-	-	+B Voltage Value [HL AutoLeveling]
Driver door touch sensor*1	Certification ECU (smart key ECU assembly)	-	-	D-Door Touch Sensor [Entry&Start]
Clearance sonar main switch condition*1	Clearance warning ECU assembly	-	-	Main Switch [Clearance Sonar]
Outer mirror control ECU assembly (for front passenger side) power source voltage*1	Outer mirror control ECU assembly (for front passenger side)	-	-	+B Voltage Input Value [Mirror R]
Outer mirror control ECU assembly (for driver side) power source voltage*1	Outer mirror control ECU assembly (for driver side)	-	-	+B Voltage Input Value [Mirror L]
Front power seat switch LH power source voltage*1	Front power seat switch LH	-	-	Power Voltage [Driver Seat]
Slide door motor unit LH power source voltage*1	Slide door motor unit LH	-	-	Power Voltage [Rear Left Door]
Slide door motor unit RH power source voltage*1	Slide door motor unit RH	-	-	Power Voltage [Rear Right Door]

*1: Whether the ECU that sends data is functioning or not can be judged by using the GTS to check items such as switches or sensors that send signals to the ECU via direct lines.

*2: Although the received contents cannot be checked in the Data List, whether or not the data is received normally can be checked by observing the combination meter assembly.

*3: The combination meter assembly receives a vehicle speed signal from the skid control ECU (brake actuator assembly) and sends the signal to other ECUs.

Details of relevant Data List items (Selected system: ABS/VSC/TRC)

Warm up the engine.
Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / ABS/VSC/TRC / Data List.

According to the display on the GTS, read the "Data List".

Chassis > ABS/VSC/TRC > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Stop Light SW	Stop light switch assembly	ON or OFF	ON: Brake pedal depressed OFF: Brake pedal released	-
Deceleration Sensor	Acceleration sensor	Min.: -18.525 m/s² Max.: 18.387 m/s²	-	During deceleration/acceleration: Changes continuously
Deceleration Sensor2	Acceleration sensor 2	Min.: -18.525 m/s² Max.: 18.387 m/s²	-	During deceleration/acceleration: Changes continuously
Yaw Rate Sensor	Yaw rate sensor	Min.: -128°/s Max.: 127°/s	Vehicle stopped: 0°/s Turning right: -128 to 0°/s Turning left: 0 to 127°/s	-
Steering Angle Sensor	Steering angle sensor	Min.: -3276.8° Max.: 3276.7°	-	Turning left: Increases Turning right: Decreases
FR Wheel Speed	Front wheel speed sensor RH reading	Min.: 0 km/h (0 mph) Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations
FL Wheel Speed	Front wheel speed sensor LH reading	Min.: 0 km/h (0 mph) Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations
RR Wheel Speed	Rear wheel speed sensor RH reading	Min.: 0 km/h (0 mph) Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations
RL Wheel Speed	Rear wheel speed sensor LH reading	Min.: 0 km/h (0 mph) Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations
Vehicle Speed	Maximum wheel speed sensor reading	Min.: 0 km/h (0 mph) Max.: 326 km/h (202 mph)	Vehicle stopped: 0 km/h (0 mph)	When driving at constant speed: No large fluctuations
Engine Revolutions	Engine speed	Min.: 0 rpm Max.: 65535 rpm	Engine stopped: 0 rpm	When engine speed is constant: No large fluctuations
Accelerator Opening Angle %	Percentage of accelerator pedal opening angle	Min.: 0.0% Max.: 128.0%	Accelerator pedal released: 0%	During accelerator pedal operation: Changes in proportion with the pedal movement

Details of relevant Data List items (Selected system: Air Conditioner)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Air Conditioner / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Air Conditioner > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Ambient Temp Sensor

Thermistor assembly (ambient temperature sensor)

Min.: -23.30°C (-9.94°F)

Max.: 65.95°C (150.71°F)

Actual ambient temperature displayed

Thermistor assembly (ambient temperature sensor) system malfunction:

When open circuit: -23.30°C (-9.94°F)
When short circuit: 65.95°C (150.71°F)

Engine Coolant Temp

Engine coolant temperature sensor

Min.: 1.30°C (34.34°F)

Max.: 90.55°C (194.99°F)

Actual engine coolant temperature displayed

SFI system malfunction
CAN communication system malfunction

Details of relevant Data List items (Selected system: Back Door)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Back Door / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Back Door > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

IG SW

Engine switch signal

ON or OFF

ON: Engine switch on (IG)

OFF: Engine switch off

"OFF" is also displayed for this item when the engine switch is on (ACC).

Details of relevant Data List items (Selected system: Clearance Sonar)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Clearance Sonar / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Clearance Sonar > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Main Switch

Multi-function switch (clearance sonar main switch) signal

ON or OFF

ON: Multi-function switch (clearance sonar main switch) on

OFF: Multi-function switch (clearance sonar main switch) off

Parking Signal

Parking signal

ON or OFF

ON: Shift lever in P

OFF: Shift lever in any position except P

Reverse Signal

Reverse signal

ON or OFF

ON: Shift lever in R

OFF: Shift lever in any position except R

Details of relevant Data List items (Selected system: Combination Meter)

Warm up the engine.
Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus:Body Electrical / Combination Meter / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Combination Meter > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Vehicle Speed Meter	Vehicle speed	Min.: 0 km/h (0 mph) Max.: 255 km/h (158 mph)	Almost the same as actual vehicle speed	-
Engine Rpm	Engine speed	Min.: 0 rpm Max.: 12750 rpm	Actual engine speed	-
Coolant Temperature	Engine coolant temperature	Min.: 0°C (0°F) Max.: 127.5°C (261.5°F)	After warming up: 75 to 100°C (167 to 212°F)	-
+B Voltage Value	Battery voltage	Min.: 0 V Max.: 25.5 V	11 to 14 V	-
Ambient Temperature	Outside temperature	Min.: -40°C (-40°F) Max.: 87.5°C (189.5°F)	Almost the same as actual outside temperature	-

Details of relevant Data List items (Selected system: Driver Seat)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Driver Seat / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Driver Seat > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Ignition Switch	Communication state of engine switch signal	ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off or on (ACC)	-
P Switch	Park state signal	ON or OFF	ON: Shift lever in P OFF: Shift lever in a position other than P	-
Vehicle Speed	Vehicle speed data	Min.: 0 km/h (0 mph) Max.: 255 km/h (158 mph)	Actual vehicle speed	-
Power Voltage	Power supply for front power seat switch LH	Min: 0.95 V Max: 20.84 V	Within range from 11 to 14 V	-

Details of relevant Data List items (Selected system: Electric Parking Brake)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / Electric Parking Brake / Data List.

According to the display on the GTS, read the "Data List".

Chassis > Electric Parking Brake > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
FR Wheel Speed	Front right wheel speed	0.0 to 326.4 km/h (0.0 to 202.8 mph)	When vehicle is stopped: 0 km/h (0 mph) When driving vehicle: Changes according to vehicle speed (when vehicle speed is constant, there are no big changes in vehicle speed display)	When not normal, front speed sensor RH system and CAN communication may be malfunctioning
FL Wheel Speed	Front left wheel speed	0.0 to 326.4 km/h (0.0 to 202.8 mph)	When vehicle is stopped: 0 km/h (0 mph) When driving vehicle: Changes according to vehicle speed (when vehicle speed is constant, there are no big changes in vehicle speed display)	When not normal, front speed sensor LH system and CAN communication may be malfunctioning
RR Wheel Speed	Rear right wheel speed	0.0 to 326.4 km/h (0.0 to 202.8 mph)	When vehicle is stopped: 0 km/h (0 mph) When driving vehicle: Changes according to vehicle speed (when vehicle speed is constant, there are no big changes in vehicle speed display)	When not normal, rear speed sensor RH system and CAN communication may be malfunctioning
RL Wheel Speed	Rear left wheel speed	0.0 to 326.4 km/h (0.0 to 202.8 mph)	When vehicle is stopped: 0 km/h (0 mph) When driving vehicle: Changes according to vehicle speed (when vehicle speed is constant, there are no big changes in vehicle speed display)	When not normal, rear speed sensor LH system and CAN communication may be malfunctioning
Vehicle Speed	Vehicle speed	0.0 to 326.4 km/h (0.0 to 202.8 mph)	When vehicle is stopped: 0 km/h (0 mph) When driving vehicle: Changes according to vehicle speed (when vehicle speed is constant, there are no big changes in vehicle speed display)	When not normal, speed sensor system and CAN communication may be malfunctioning
Deceleration Sensor 1	Deceleration sensor (airbag ECU assembly) 1 input signal	-18.327 to 18.183 m/s²	When vehicle is stopped: 0 m/s² When driving vehicle: Continuously changes	When not normal, deceleration sensor (airbag ECU assembly) system and CAN communication may be malfunctioning
Deceleration Sensor 2	Deceleration sensor (airbag ECU assembly) 2 input signal	-18.327 to 18.183 m/s²	When vehicle is stopped: 0 m/s² When driving vehicle: Continuously changes	When not normal, deceleration sensor (airbag ECU assembly) system and CAN communication may be malfunctioning
P Position	Shift lever position input signal	ON or OFF	ON: Shift lever in P OFF: Shift lever not in P	When not normal, shift position signal system may be malfunctioning
Ambient Temperature	Ambient temperature	-40 to 50°C (-40 to 122°F)	-	When displayed value differs from actual ambient temperature, air conditioning system and CAN communication system may be malfunctioning
ECU Voltage Monitor	Parking brake actuator assembly motor power supply voltage	0.00 to 20.00 V	11 to 14 V	When not normal, +B input circuit may be malfunctioning or battery voltage may have decreased
IG Status	Engine switch status	ON or OFF	ON: Engine switch is on (IG) OFF: Engine switch is on (ACC) or off	When not normal, IG circuit may be malfunctioning

Details of relevant Data List items (Selected system: EMPS)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Chassis / EMPS / Data List.

According to the display on the GTS, read the "Data List".

Chassis > EMPS > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Steering Angle Velocity	Steering angle speed	Min.: -32768 deg/s Max.: 32767 deg/s	Value changes in proportion to steering speed - The value increases when turning left and decreases when turning right	Engine running and steering wheel being turned
Meter Vehicle Velocity	Vehicle speed from speedometer	Min.: 0.0 km/h (0.0 MPH) Max.: 300.0 km/h (186.4 MPH)	0 km/h (0 MPH): Engine running and vehicle stopped No significant fluctuation: Engine running and vehicle driven at a constant speed	-
Engine Revolution	Engine speed	Min.: 0 rpm Max.: 12800 rpm	No significant fluctuation	Engine running at a constant speed
IG Power Supply	IG power source voltage	Min.: 0.0000 V Max.: 20.1531 V	8 to 16 V	Engine switch on (IG)

Details of relevant Data List items (Selected system: Engine)

Warm up the engine.
Turn the A/C switch off.
Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Powertrain / Engine / Data List.
Tech Tips
- To display the list box, press the pull down menu button next to Primary. Then select a measurement group.
- When you select a measurement group, the ECU data belonging to that group is displayed.
- Measurement Group List / Description

According to the display on the GTS, read the "Data List".

Tech Tips

The title used for each group of Data List items in this repair manual does not appear on the GTS. However, the name in parentheses after the title, which is a Measurement Group, does appear on the GTS. When the name shown in parentheses is selected on the GTS, all the Data List items listed for that group will be displayed.
"Reference Value" is the assessment of one vehicle. Use it only for reference.
The values listed under "Reference Value" are those of an inspection performed in NORMAL mode.

Powertrain > Engine > Data List

Tester Display	Measurement Item	Range	Normal Condition	Reference Value	Diagnostic Note
Vehicle Speed	Vehicle speed	Min.: 0 km/h (0 mph) Max.: 255 km/h (158 mph)	Actual vehicle speed	-	This is the current vehicle speed. The vehicle speed is detected using the wheel speed sensors. There is a delay in when the vehicle speed data is displayed. Therefore, even if the vehicle speed listed in the freeze frame data is 0 km/h (0 mph), this does not always mean that the malfunction occurred when the vehicle was stopped.
Engine Speed	Engine speed	Min.: 0 rpm Max.: 16383 rpm	600 to 700 rpm: Idling with warm engine (A/C off, shift lever in N)	Idling (engine warmed up and A/C off): 667 rpm	When the crankshaft position sensor is malfunctioning, "Engine Speed" is approximately 0 rpm or varies greatly from the actual engine speed.
Coolant Temp	Engine coolant temperature	Min.: -40°C (-40°F) Max.: 140°C (284°F)	75 to 100°C (167 to 212°F): After warming up	-	This is the engine coolant temperature. Tech Tips After warming up the engine, the engine coolant temperature is 75 to 100°C (167 to 212°F). After a long soak, the engine coolant temperature, intake air temperature and ambient air temperature are approximately equal. If the value is -40°C (-40°F), or 140°C (284°F), the sensor circuit is open or shorted. Check if the engine overheats when the value indicates higher than 140°C (284°F).
Battery Voltage	Battery voltage	Min.: 0 V Max.: 65.535 V	11 to 14 V: Idling	Engine switch on (IG): 12.714 V Cranking: 9.902 V Idling (engine warmed up): 14.023 V	If 11 V or less, characteristics of some electrical components may change.
Accelerator Position	Accelerator pedal position	Min.: 0% Max.: 399.9%	Actual accelerator pedal position	Engine switch on (IG): 0.0% (accelerator pedal fully released) Engine switch on (IG): 100.0% (accelerator pedal fully depressed)	This is the accelerator pedal position defined using the learned fully released position (sensor output) of No. 1 accelerator pedal position sensor as 0% and the fully depressed position as 100%.
Neutral Position SW Signal	Neutral position switch signal status	ON or OFF	ON: Shift lever in P or N	-	-

Details of relevant Data List items (Selected system: Entry&Start)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Entry&Start / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Entry&Start > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

D-Door Touch Sensor

Driver door touch sensor (unlock sensor)

ON or OFF

ON: Driver door touch sensor (unlock sensor) touched

OFF: Driver door touch sensor (unlock sensor) not touched

Displays whether the unlock sensor is on or off (even if the sensor is touched and contact is maintained, "ON" is displayed only momentarily).
Use this Data List item to help determine if there is an unlock sensor malfunction when the entry unlock function does not operate.

Details of relevant Data List items (Selected system: HL AutoLeveling)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / HL AutoLeveling / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > HL AutoLeveling > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Headlight High Beam State	High beam headlight state	ON or OFF	ON: High beam headlights on OFF: High beam headlights off	-
Front Right Wheel Speed Value	Front right wheel speed	0.00 to 260.00 km/h (161.56 mph)	Condition can be displayed	-
Front Left Wheel Speed Value	Front Left Wheel Speed Value	0.00 to 260.00 km/h (161.56 mph)	Condition can be displayed	-
+B Voltage Value	Headlight light control ECU power supply voltage value	0 to 19.75 V	11 to 14 V	-

Details of relevant Data List items (Selected system: Main Body)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Main Body / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

IG SW

Engine switch on (IG) signal

ON or OFF

ON: Engine switch on (IG)

OFF: Engine switch off or (ACC)

FL Door Courtesy SW

Front door courtesy light switch assembly LH signal

ON or OFF

ON: Front door LH open

OFF: Front door LH closed

Dimmer SW

Dimmer switch high position signal

ON or OFF

ON: Dimmer switch in high or high flash position

OFF: Dimmer switch in low position

Details of relevant Data List items (Selected system: Mirror L)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Mirror L / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Mirror L > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

+B Voltage Input Value

Power supply for outer mirror control ECU assembly LH

MIN: 0 V

MAX: 25.5 V

11 to 14 V

Details of relevant Data List items (Selected system: Mirror R)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Mirror R / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Mirror R > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

+B Voltage Input Value

Power supply for outer mirror control ECU assembly RH

MIN: 0 V

MAX: 25.5 V

11 to 14 V

Details of relevant Data List items (Selected system: Navigation System)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Navigation System / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Navigation System > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Battery Voltage

Battery voltage

Min.: 0 V

Max.: 24 V

11 to 14 V

Reverse Signal

Reverse signal

ON or OFF

ON: Shift lever in R

OFF: Shift lever in any position other than R

Vehicle Speed

Maximum wheel speed sensor reading

Min.: 0 km/h (0 mph)

Max.: 255 km/h (158 mph)

Vehicle stopped: 0 km/h (0 mph)

When driving at constant speed: No large fluctuations

Details of relevant Data List items (Selected system: Power Source Control)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Power Source Control / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Shift P Signal

Shift position P

ON or OFF

ON: Shift lever in P

OFF: Shift lever not in P

Use this item to determine whether the shift lever position switch (P) is malfunctioning.

Stop Light Switch1

State of brake pedal

ON or OFF

ON: Brake pedal depressed

OFF: Brake pedal released

Use this item to determine whether the stop light switch is malfunctioning.
The engine cannot be started when this item is OFF.
If the stop light switch is malfunctioning, the engine can be started by pressing and holding the engine switch for a certain period of time.

Engine Condition

Engine state

Stop or Run

Stop: Engine stopped

Run: Engine running

Details of relevant Data List items (Selected system: Rear Left Door)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Rear Left Door / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Rear Left Door > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Power Voltage

Battery voltage

Min.: 0 V

Max.: 25.5 V

11 to 14 [V]

Details of relevant Data List items (Selected system: Rear Right Door)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Rear Right Door / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Rear Right Door > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Power Voltage

Battery voltage

Min.: 0 V

Max.: 25.5 V

11 to 14 [V]

Details of relevant Data List items (Selected system: Starting Control)

Turn the engine switch off.
Connect the GTS to the DLC3.
Turn the engine switch on (IG).
Turn the GTS on.
Enter the following menus: Body Electrical / Starting Control / Data List.

According to the display on the GTS, read the "Data List".

Body Electrical > Starting Control > Data List

Tester Display	Measurement Item	Range	Normal Condition	Diagnostic Note
Engine Speed	Engine speed	0 to 16383 rpm	Fluctuates in accordance with engine speed	-