SMART ENTRY AND START SYSTEM(for Entry Function) All Door Entry Lock/Unlock Functions and Wireless Functions do not Operate

DESCRIPTION

If the entry lock and wireless door lock operations cannot be performed, the door control receiver may be malfunctioning, or there may be wave interference or problems in the communication which is used for the entry and wireless function between the door control receiver and certification ECU (smart key ECU assembly).

WIRING DIAGRAM

CAUTION / NOTICE / HINT

Note

When using the GTS with the engine switch off, connect the GTS to the DLC3 and turn a courtesy light switch on and off at intervals of 1.5 seconds or less until communication between the GTS and the vehicle begins. Then select Model Code "KEY REGIST" under manual mode and enter the following menus: Body Electrical / Entry&Start(CAN). While using the GTS, periodically turn a courtesy light switch on and off at intervals of 1.5 seconds or less to maintain communication between the GTS and the vehicle.
The smart entry and start system (for Entry Function) uses the LIN communication system and CAN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the smart entry and start system (for Entry Function) after confirming that the communication systems are functioning properly.

Click here
Before replacing the certification ECU (smart key ECU assembly) or main body ECU (multiplex network body ECU), refer to Service Bulletin.
After repair, confirm that no DTCs are output.
Inspect the fuses for circuits related to this system before performing the following procedure.
Check that there are no electrical key transmitter sub-assemblies in the vehicle.
Before performing the inspection, check that DTC B1242 (wireless door lock control) is not output.

Click here
Door control receiver (for 12 Pin Type)

It is necessary to perform initialization after registration of the transmitter IDs into the door control receiver if the door control receiver has been replaced.

for initialization:

Click here
for registration:

Click here

The vehicle battery supplies power to the main body ECU (multiplex network body ECU) via the door control battery. Therefore, before performing this troubleshooting procedure, make sure to perform an on-vehicle inspection to confirm that the main body ECU (multiplex network body ECU) power source circuit is normal.*

Click here

*: w/ Door Control Battery

PROCEDURE

INSPECT BATTERY VOLTAGE

Measure the battery voltage.

Standard Voltage
11 to 14 V

Tech Tips

It may be possible to tell whether the battery is discharged by operating the horn.

If the voltage is below 11 V, recharge or replace the battery before proceeding to the next step.

Result

Proceed to
NEXT

CHECK FOR DTC

Open the driver door using the mechanical key built into the electrical key transmitter sub-assembly.

Check for DTCs.

Body Electrical > Entry&Start > Trouble Codes

Result

Result	Proceed to
DTCs are not output	A
DTCs are output	B

GO TO DIAGNOSTIC TROUBLE CODE CHART Click here

CHECK DOOR AJAR WARNING

When the doors are locked by operating the entry lock function with all doors closed, check that the door ajar warning operates.

Tech Tips

Be sure to check the following before performing the procedure.

Engine switch is off.
All the doors is close.
The lock sensor is on or lock switch is pressed on the electrical key transmitter sub-assembly.
Electrical key transmitter sub-assembly is in the vehicle exterior detection area.

Result

Result	Proceed to
The wireless buzzer does not sound	A
The wireless buzzer sounds	B

GO TO LIGHTING SYSTEM (Proceed to Door Courtesy Switch Circuit) Click here

CHECK POWER DOOR LOCK CONTROL SYSTEM

When the door control switch on the multiplex network master switch assembly is operated, check that the doors unlock and lock according to the switch operation.

Click here

Result

Result	Proceed to
Power door lock function operates normally	A
Power door lock function does not operate normally	B

GO TO POWER DOOR LOCK CONTROL SYSTEM Click here

CHECK KEY DIAGNOSTIC MODE

Check the following antennas in key diagnostic mode.

Body Electrical > Entry&Start > Utility

Tester Display
Communication Check(Key Diag Mode)

Figure 1. for LHD:

*a 0.7 to 1 m (2.30 to 3.28 ft.)
Figure 2. for RHD:

*a 0.7 to 1 m (2.30 to 3.28 ft.)

Check the electrical key antenna (for driver door):

When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the front door outside handle assembly (for driver door), check that the wireless buzzer sounds.
Tech Tips
- Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
- If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
Figure 3. for LHD:

*a 0.7 to 1 m (2.30 to 3.28 ft.)
Figure 4. for RHD:

*a 0.7 to 1 m (2.30 to 3.28 ft.)

Check the electrical key antenna (for front passenger door):

When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the front door outside handle assembly (for front passenger door), check that the wireless buzzer sounds.
Tech Tips
- Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
- If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
*a Inspection Point

Check the No. 1 indoor electrical key antenna assembly (front floor):

When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.
Tech Tips
- Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
- If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
*a Inspection Point

Check the No. 1 indoor electrical key antenna assembly (rear floor):

When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.
Tech Tips
- Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
- If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
*a Inspection Point

Check the No. 1 indoor electrical key antenna assembly (inside luggage compartment):

When the electrical key transmitter sub-assembly is at either inspection point, check that the wireless buzzer sounds.
Tech Tips
- Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
- If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
*a 0.7 to 1 m (2.30 to 3.28 ft.)

Check the electrical key antenna (outside luggage compartment):

When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the electrical key antenna (outside luggage compartment), check that the wireless buzzer sounds.
Tech Tips
- Select either channel 1 or channel 2 and perform the key diagnostic mode inspection for each channel.
- If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter sub-assembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
OK

Wireless buzzer sounds.

OK
Wireless buzzer sounds.

Result

Result	Proceed to
Key diagnostic mode inspections fail for both channels	A
Key diagnostic mode inspections succeed for both channels	B
Key diagnostic mode inspection succeeds for only one of the channels	C

PERFORM REGISTRATION Click here

CHECK WAVE ENVIRONMENT Click here

CHECK WAVE ENVIRONMENT

Bring the electrical key transmitter sub-assembly near the door control receiver and perform a wireless operation 2 or more times*.

*: When the wireless function is operated, channel 1 and 2 are used alternately. If the first wireless operation is performed successfully and the second wireless operation fails, wave interference may be occurring for either channel.

Tech Tips

When the electrical key transmitter sub-assembly is brought near the door control receiver, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.
There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.
If a tool for checking radio waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

Result

Result	Proceed to
Wireless function does not operate normally	A
Wireless function operates normally	B

AFFECTED BY WAVE INTERFERENCE

CHECK TRANSMITTER BATTERY

Check the transmitter battery level of the electrical key transmitter sub-assembly that was checked first.

Press and hold the lock switch of the electrical key transmitter sub-assembly for 5 seconds and check the number of times that the LED illuminates.
Tech Tips
- The electrical key transmitter sub-assembly sends voltage information to the certification ECU (smart key ECU assembly) when it is being used. "Yes" is displayed for the Data List item "Key Low Battery" when this voltage information indicates 2.2 V or less.
  
  Click here
- Even if the transmitter battery is depleted, it is still possible to start the engine by holding the electrical key transmitter sub-assembly near the engine switch, depressing the brake pedal and pressing the engine switch.

Result

Result	Proceed to
LED illuminates 3 times or more when switch is pressed and held	A
LED does not illuminate when switch is pressed and held	B
LED illuminates once or twice but not a third time	C

INSPECT TRANSMITTER BATTERY Click here

REPLACE TRANSMITTER BATTERY Click here

CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

Check if there is another electrical key transmitter sub-assembly available that is already registered to the vehicle.

Result

Result	Proceed to
Another registered electrical key transmitter sub-assembly is not available	A
Another registered electrical key transmitter sub-assembly is available	B

GO TO STEP 10 Click here

ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY REGISTRATION (NEW ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY)

Tech Tips

Refer to Service Bulletin.

Result

Proceed to
NEXT

CHECK ENTRY LOCK OPERATION

Using another registered electrical key transmitter sub-assembly, check that the function operates normally.

Result

Result	Proceed to
Entry function does not operate normally	A
Entry function operates normally	B

END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS DEFECTIVE)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - DOOR CONTROL RECEIVER AND BODY GROUND)

Disconnect the R8 certification ECU (smart key ECU assembly) connector.
Disconnect the R9*1 or R14*2 door control receiver connector.
- *1: for 12 Pin Type
- *2: for 5 Pin Type

Measure the resistance according to the value(s) in the table below.

Standard Resistance

for 12 Pin Type:
Tester Connection	Condition	Specified Condition
R8-18 (RCO) - R9-8 (+5)	Always	Below 1 Ω
R8-19 (RDAM) - R9-2 (DATA)	Always	Below 1 Ω
R8-20 (CSEL) - R9-6 (CSEL)	Always	Below 1 Ω
R9-12 (GND) - Body ground	Always	Below 1 Ω
R8-18 (RCO) or R9-8 (+5) - Other terminals and body ground	Always	10 kΩ or higher
R8-19 (RDAM) or R9-2 (DATA) - Other terminals and body ground	Always	10 kΩ or higher
R8-20 (CSEL) or R9-6 (CSEL) - Other terminals and body ground	Always	10 kΩ or higher

for 5 Pin Type:
Tester Connection	Condition	Specified Condition
R8-18 (RCO) - R14-4 (+5)	Always	Below 1 Ω
R8-19 (RDAM) - R14-5 (DATA)	Always	Below 1 Ω
R8-20 (CSEL) - R14-2 (CSEL)	Always	Below 1 Ω
R14-1 (GND) - Body ground	Always	Below 1 Ω
R8-18 (RCO) or R14-4 (+5) - Other terminals and body ground	Always	10 kΩ or higher
R8-19 (RDAM) or R14-5 (DATA) - Other terminals and body ground	Always	10 kΩ or higher
R8-20 (CSEL) or R14-2 (CSEL) - Other terminals and body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK ENTRY LOCK OPERATION

Connect all connectors and check that the function operates normally.

Click here

Result

Result	Proceed to
Entry function does not operate normally	A
Entry function operates normally	B

END (CONNECTOR WAS NOT CONNECTED SECURELY)

CHECK DOOR CONTROL RECEIVER

for 12 Pin Type

for 5 Pin Type

Component with harness connected

(Door Control Receiver)

Measure the resistance according to the value(s) in the table below.

Standard Resistance

for 12 Pin Type:
Tester Connection	Condition	Specified Condition
R9-12 (GND) - Body ground	Always	Below 1 Ω

for 5 Pin Type:
Tester Connection	Condition	Specified Condition
R14-1 (GND) - Body ground	Always	Below 1 Ω

*A	for 12 Pin Type
*B	for 5 Pin Type
*a	Component with harness connected (Door Control Receiver)
*b	Waveform 1
*c	Before lock or unlock switch of electrical key transmitter sub-assembly pressed
*d	After lock or unlock switch of electrical key transmitter sub-assembly pressed

Using an oscilloscope, check the waveform.

for 12 Pin Type:
Tester Connection	Condition	Tool Setting	Specified Condition
R9-2 (DATA) - R9-12 (GND)	Procedure: Engine switch off All doors locked Electrical key transmitter sub-assembly not inside vehicle Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed	5 V/DIV., 500 ms/DIV.	Below 1 V → Pulse generation (See waveform 1)

for 5 Pin Type:
Tester Connection	Condition	Tool Setting	Specified Condition
R14-5 (DATA) - R14-1 (GND)	Procedure: Engine switch off All doors locked Electrical key transmitter sub-assembly not inside vehicle Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed	5 V/DIV., 500 ms/DIV.	Below 1 V → Pulse generation (See waveform 1)

Result

Result	Proceed to
OK	A
NG (for 12 Pin Type)	B
NG (for 5 Pin Type)	C

REPLACE ELECTRICAL KEY AND TIRE PRESSURE WARNING ECU AND RECEIVER Click here

REPLACE SMART DOOR CONTROL RECEIVER ASSEMBLY Click here

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

for 12 Pin Type

for 5 Pin Type

Component with harness connected

(Door Control Receiver)

Measure the voltage according to the value(s) in the table below.

Standard Voltage

for 12 Pin Type:
Tester Connection	Condition	Specified Condition
R9-1 (IG) - R9-12 (GND)	Engine switch on (IG)	10 to 16 V
R9-6 (CSEL) - R9-12 (GND)	Procedure: Engine switch off All doors closed	Below 1 V → Pulse generation

for 5 Pin Type:
Tester Connection	Condition	Specified Condition
R14-2 (CSEL) - R14-1 (GND)	Procedure: Engine switch off All doors closed	Below 1 V → Pulse generation

*A	for 12 Pin Type
*B	for 5 Pin Type
*a	Component with harness connected (Door Control Receiver)
*b	Waveform 1
*c	Before lock or unlock switch of electrical key transmitter sub-assembly pressed
*d	After lock or unlock switch of electrical key transmitter sub-assembly pressed

Using an oscilloscope, check the waveform.

for 12 Pin Type:
Tester Connection	Condition	Tool Setting	Specified Condition
R9-8 (+5) - R9-12 (GND)	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveform 1)

for 5 Pin Type:
Tester Connection	Condition	Tool Setting	Specified Condition
R14-4 (+5) - R14-1 (GND)	Procedure: Engine switch off Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed	2 V/DIV., 500 ms/DIV.	Pulse generation (See waveform 1)

Result

Proceed to
OK
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Replace the certification ECU (smart key ECU assembly) and perform registration again.

Tech Tips

Refer to Service Bulletin.

Result

Proceed to
NEXT

CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

Check that the wireless function operates normally.

Click here

Result

Result	Proceed to
Wireless door lock function operates normally	A
Wireless door lock function does not operate normally	B

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

INSPECT TRANSMITTER BATTERY

Inspect the transmitter battery.

Click here

Note

Do not wrap the lead wire around a terminal, wedge it between terminals, or solder it. The terminal may be deformed or damaged, and the transmitter battery will not be able to be installed correctly.

Result

Proceed to
OK
NG

REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

REPLACE TRANSMITTER BATTERY Click here

PERFORM REGISTRATION

Perform registration of the B code.

Tech Tips

Refer to Service Bulletin.

Result

Proceed to
NEXT

CHECK ENTRY LOCK OPERATION

After completing B code registration, check that the entry lock and unlock functions can be operated 2 times consecutively.

Click here

Result

Result	Proceed to
Entry function does not operate normally	A
Entry function operates normally	B

END (B CODE REGISTRATION FAILED)

READ VALUE USING GTS (B CODE)

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.

Read the Data List according to the display on the GTS.

Body Electrical > Entry&Start > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

B Code

B code registration status

No Regd or Regd

No Regd: B code not registered correctly

Regd: B code registered correctly

Body Electrical > Entry&Start > Data List

Tester Display
B Code

Result

Result	Proceed to
"No Regd" is displayed on the GTS	A
"Regd" is displayed on the GTS	B

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

READ VALUE USING GTS (B CODE DIFFERENCE)

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.

Read the Data List according to the display on the GTS.

Body Electrical > Entry&Start > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

B Code Difference

B code mismatch

No or Yes

No: Communication normal

Yes: Communication malfunction

Body Electrical > Entry&Start > Data List

Tester Display
B Code Difference

Result

Result	Proceed to
"No" is displayed on the GTS	A
"Yes" is displayed on the GTS	B

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Measure the voltage while checking the Data List on the GTS.

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.

Read the Data List according to the display on the GTS.

Component with harness connected

(Certification ECU (Smart Key ECU Assembly))

Body Electrical > Power Source Control > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Power Supply Condition

Power supply state

All OFF, ACC ON, IG ON or ST ON

All OFF: Engine switch off

ACC ON: Engine switch on (ACC)

IG ON: Engine switch on (IG)

ST ON: Sending engine start request signal

Body Electrical > Power Source Control > Data List

Tester Display
Power Supply Condition

Standard Voltage

Tester Connection	Condition	Specified Condition
K62-17 (IG1D) - Body ground	Engine switch off	Below 1 V
	Engine switch on (ACC)	Below 1 V
	Engine switch on (IG)	9 V or higher
K62-16 (ACCD) - Body ground	Engine switch off	Below 1 V
	Engine switch on (ACC)	9 V or higher
	Engine switch on (IG)	9 V or higher

Result

Proceed to
OK
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

READ VALUE USING GTS (ACC SW, IG SW)

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.

Read the Data List according to the display on the GTS.

Body Electrical > Main Body > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

ACC SW

Engine switch status

OFF or ON

OFF: Engine switch off

ON: Engine switch on (ACC)

"ON" is also displayed when the engine switch is on (IG).

IG SW

Engine switch status

OFF or ON

OFF: Engine switch off

ON: Engine switch on (IG)

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

Body Electrical > Main Body > Data List

Tester Display
ACC SW
IG SW

Tech Tips

If the certification ECU (smart key ECU assembly) misjudges for any reason that the engine switch is on (IG) even though the engine switch is off, the entry lock and unlock functions will be disabled.

Result

Result	Proceed to
The main body ECU (multiplex network body ECU) judges properly that the power source is off when the engine switch is off	A
The main body ECU (multiplex network body ECU) does not judge properly that the power source is off when the engine switch is off	B

TROUBLESHOOT MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

CHECK HARNESS AND CONNECTOR (BODY GROUND, POWER SUPPLY)

*a
Front view of wire harness connector

(to Certification ECU (Smart Key ECU Assembly))

Disconnect the K62 certification ECU (smart key ECU assembly) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

Tester Connection	Condition	Specified Condition
K62-18 (E) - Body ground	Always	Below 1 Ω

Measure the voltage according to the value(s) in the table below.

Standard Voltage

Tester Connection	Condition	Specified Condition
K62-15 (CUTB) - Body ground	Always	11 to 14 V

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK ENTRY LOCK OPERATION

Disconnect and reconnect the certification ECU (smart key ECU assembly) connectors.

Check that the function operates normally.

Click here

Result

Result	Proceed to
Entry function does not operate normally	A
Entry function operates normally	B

END (CONNECTOR WAS NOT CONNECTED SECURELY)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Replace the certification ECU (smart key ECU assembly) with a new one and perform registration again.

Tech Tips

Refer to Service Bulletin.

Result

Proceed to
NEXT

CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

Check that the function operates normally.

Click here

Result

Result	Proceed to
Wireless door lock function operates normally	A
Wireless door lock function does not operate normally	B

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

CHECK WAVE ENVIRONMENT

Bring the electrical key transmitter sub-assembly near the door control receiver and perform a wireless operation 2 or more times*.

*: When the wireless function is operated, channel 1 and 2 are used alternately. If the first wireless operation is performed successfully and the second wireless operation fails, wave interference may be occurring for either channel.

Tech Tips

When the electrical key transmitter sub-assembly is brought near the door control receiver, the possibility of wave interference decreases, and it can be determined if wave interference is causing the problem symptom.
If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.
There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.
If a tool for checking radio waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

Result

Result	Proceed to
Wireless function does not operate normally	A
Wireless function operates normally 1 or more times.	B

AFFECTED BY WAVE INTERFERENCE

CHECK ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

Check if there is another electrical key transmitter sub-assembly available that is already registered to the vehicle.

Result

Result	Proceed to
Another registered electrical key transmitter sub-assembly is not available	A
Another registered electrical key transmitter sub-assembly is available	B

GO TO STEP 31 Click here

ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY REGISTRATION (NEW ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY)

Tech Tips

Refer to Service Bulletin.

Result

Proceed to
NEXT

CHECK WAVE ENVIRONMENT

Bring another registered electrical key transmitter sub-assembly near the door control receiver and perform a wireless operation 2 or more times*.

*: When the wireless function is operated, channel 1 and 2 are used alternately. If the first wireless operation is performed successfully and the second wireless operation fails, wave interference may be occurring for either channel.

Tech Tips

If the inspection result is that the problem only occurs in certain locations or at certain times of day, the possibility of wave interference is high. Also, added vehicle components may cause wave interference. If installed, remove them and perform the operation check.
There may be wave interference if the vehicle is near broadcasting antennas, large video displays, wireless garage door opener systems, wireless security cameras, home security systems, etc. In this case, move the vehicle to a different location and check if there is any improvement.
If a tool for checking radio waves, such as a signal strength meter, is available, move around the area while observing both the LF band (used by the vehicle antenna to form the detection area) and RF band (used by the electrical key transmitter sub-assembly for transmission) to check for locations where there is wave interference.

Result

Result	Proceed to
Wireless function does not operate normally	A
Wireless function operates normally 1 or more times.	B

END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS DEFECTIVE)

CHECK HARNESS AND CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) - DOOR CONTROL RECEIVER)

Disconnect the R9*1 or R14*2 door control receiver connector.
- *1: for 12 Pin Type
- *2: for 5 Pin Type
Disconnect the R8 certification ECU (smart key ECU assembly) connector.

Measure the resistance according to the value(s) in the table below.

Standard Resistance

for 12 Pin Type:
Tester Connection	Condition	Specified Condition
R9-6 (CSEL) - R8-20 (CSEL)	Always	Below 1 Ω
R9-6 (CSEL) or R8-20 (CSEL) - Other terminals and body ground	Always	10 kΩ or higher

for 5 Pin Type:
Tester Connection	Condition	Specified Condition
R14-2 (CSEL) - R8-20 (CSEL)	Always	Below 1 Ω
R14-2 (CSEL) or R8-20 (CSEL) - Other terminals and body ground	Always	10 kΩ or higher

Result

Proceed to
OK
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK ENTRY LOCK OPERATION

Connect all connectors and check that the function operates normally.

Click here

Result

Result	Proceed to
Entry function does not operate normally	A
Entry function operates normally	B

END (CONNECTOR WAS NOT CONNECTED SECURELY)

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

for 12 Pin Type

for 5 Pin Type

Component with harness connected

(Door Control Receiver)

Measure the voltage according to the value(s) in the table below.

Standard Voltage

for 12 Pin Type:
Tester Connection	Condition	Specified Condition
R9-6 (CSEL) - R9-12 (GND)	Procedure: Engine switch off All doors closed	Below 1 V → Pulse generation

for 5 Pin Type:
Tester Connection	Condition	Specified Condition
R14-2 (CSEL) - R14-1 (GND)	Procedure: Engine switch off All doors closed	Below 1 V → Pulse generation

Result

Proceed to
OK
NG

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

CHECK DOOR CONTROL RECEIVER

Enter key diagnostic mode and select the channel for which the wireless buzzer did not sound.

*A	for 12 Pin Type
*B	for 5 Pin Type
*a	Component with harness connected (Door Control Receiver)
*b	Waveform 1
*c	Before lock or unlock switch of electrical key transmitter sub-assembly pressed
*d	After lock or unlock switch of electrical key transmitter sub-assembly pressed

Using an oscilloscope, check the waveform.

for 12 Pin Type:
Tester Connection	Condition	Tool Setting	Specified Condition
R9-2 (DATA) - R9-12 (GND)	Procedure: Engine switch off All doors locked Electrical key transmitter sub-assembly not inside vehicle Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed	5 V/DIV., 500 ms/DIV.	Pulse generation (See waveform 1)

for 5 Pin Type:
Tester Connection	Condition	Tool Setting	Specified Condition
R14-5 (DATA) - R14-1 (GND)	Procedure: Engine switch off All doors locked Electrical key transmitter sub-assembly not inside vehicle Electrical key transmitter sub-assembly brought outside detection area but kept inside wireless function operational area Lock or unlock switch of electrical key transmitter sub-assembly not pressed → pressed	5 V/DIV., 500 ms/DIV.	Pulse generation (See waveform 1)

Tech Tips

Inspection should be performed while the electrical key antenna check in key diagnostic mode is being performed on the failed channel (the channel in which the buzzer did not sound).

Result

Result	Proceed to
OK	A
NG (for 12 Pin Type)	B
NG (for 5 Pin Type)	C

REPLACE ELECTRICAL KEY AND TIRE PRESSURE WARNING ECU AND RECEIVER Click here

REPLACE SMART DOOR CONTROL RECEIVER ASSEMBLY Click here

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Replace the certification ECU (smart key ECU assembly) and perform registration again.

Tech Tips

Refer to Service Bulletin.

Result

Proceed to
NEXT

CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

Check that the function operates normally.

Click here

Result

Result	Proceed to
Wireless door lock function operates normally	A
Wireless door lock function does not operate normally	B

END (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) WAS DEFECTIVE)

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here