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 lock operations cannot be performed, there may be door control receiver malfunctions, 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

The 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 entry and start system (for Entry Function) after confirming that the communication systems are functioning properly Click here.
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.
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.
Inspect the fuses for circuits related to this system before performing the following procedure.
Before replacing the certification ECU (smart key ECU assembly) or main body ECU (multiplex network body ECU), refer to entry and start system (for Entry Function) Click here.
After repair, confirm that no DTCs are output by performing "DTC Output Confirmation Operation".
When replacing the electrical key & TPMS receiver assembly, read the transmitter IDs (tire pressure warning system) stored in the old ECU using the GTS and write them down before removal Click here*.
It is necessary to perform initialization (See page ) after registration Click here of the transmitter IDs into the electrical key & TPMS receiver assembly if the electrical key & TPMS receiver assembly has been replaced*.

*: for 12 Pin Type

PROCEDURE

INSPECT BATTERY VOLTAGE
1. Measure the voltage of the battery with the engine switch off.
  
  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.
NEXT

Standard voltage
11 to 14 V

CHECK FOR DTC

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

Check for DTCs Click here.

Result
Result	Proceed to
DTCs are not output (w/ Door Ajar Warning Function)	A
DTCs are not output (w/o Door Ajar Warning Function)	B
DTCs are output	C

CHECK POWER DOOR LOCK CONTROL SYSTEM Click here

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

Warning function (door ajar warning) Click here.

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

GO TO LIGHTING SYSTEM 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.

Text in Illustration
*A	for LHD
*B	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 inspect key diagnostic mode 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.

Text in Illustration
*A	for LHD
*B	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 inspect key diagnostic mode 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.

Text in Illustration
*A	for LHD
*B	for RHD
*a	0.7 to 1 m (2.30 to 3.28 ft.)

Check the electrical key antenna (for rear door [for driver side]):

When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the rear door outside handle assembly (for driver side), check that the wireless buzzer sounds.

Tech Tips

Select either channel 1 or channel 2 and inspect key diagnostic mode 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.

Text in Illustration
*A	for LHD
*B	for RHD
*a	0.7 to 1 m (2.30 to 3.28 ft.)

Check the electrical key antenna (for rear door [for front passenger side]):

When the electrical key transmitter sub-assembly is brought within 0.7 to 1 m (2.30 to 3.28 ft.) of the rear door outside handle assembly (for front passenger side), check that the wireless buzzer sounds.

Tech Tips

Select either channel 1 or channel 2 and inspect key diagnostic mode 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.

Text in Illustration

*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 inspect key diagnostic mode for each channel.
- If the buzzer sounds with [CH1] displayed but not with [CH2], the electrical key transmitter subassembly cannot be detected by channel 2 due to a malfunction, such as wave interference.
Text in Illustration

*a Inspection Point

Check the No. 2 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 inspect key diagnostic mode 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.
Text in Illustration

*a Inspection Point

Check the No. 3 indoor electrical key antenna assembly (inside luggage):

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 inspect key diagnostic mode 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.

Text in Illustration
*a	Inspection Point

Text in Illustration
*a	Inspection Point

Text in Illustration
*a	Inspection Point

Text in Illustration
*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 inspect key diagnostic mode 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.

Result
Result	Proceed to
Diagnostic mode inspections fail for both channels	A
Diagnostic mode inspections succeed for both channels	B
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 that was checked first near the door control receiver and select the failed channel (the channel in which the buzzer did not sound) to recheck key diagnostic mode Click here.

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
The wireless buzzer does not sound	A
The wireless buzzer sounds	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 transmitter for 5 seconds and check the number of times that the transmitter 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. The certification ECU (smart key ECU assembly) displays "Yes" for the "Key Low Battery" item of the Data List 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
Transmitter LED illuminates 3 times or more when switch is pressed and held	A
Transmitter LED does not illuminate when switch is pressed and held	B
Transmitter 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

CHECK ENTRY LOCK OPERATION Click here

ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY REGISTRATION (NEW ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY)
1. Register a new electrical key transmitter sub-assembly.
  
  Tech Tips
  
  Refer to the Service Bulletin.
NEXT

CHECK ENTRY LOCK OPERATION

Using another registered electrical key transmitter sub-assembly, check that the entry lock and unlock functions operate.

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 E150 certification ECU (smart key ECU assembly) connector.
Disconnect the L85*1 or L69*2 door control receiver connector.
- *1: for 5 Pin Type
- *2: for 12 Pin Type

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

Standard Resistance

for 5 Pin Type
Tester Connection	Condition	Specified Condition
E150-18 (RCO) - L85-4 (+5)	Always	Below 1 Ω
E150-20 (RDAM) - L85-5 (DATA)	Always	Below 1 Ω
E150-19 (CSEL) - L85-2 (RSSI)	Always	Below 1 Ω
L85-1 (GND) - Body ground	Always	Below 1 Ω
E150-18 (RCO) or L85-4 (+5) - Body ground	Always	10 kΩ or higher
E150-20 (RDAM) or L85-5 (DATA) - Body ground	Always	10 kΩ or higher
E150-19 (CSEL) or L85-2 (RSSI) - Body ground	Always	10 kΩ or higher

for 12 Pin Type
Tester Connection	Condition	Specified Condition
E150-18 (RCO) - L69-8 (+5)	Always	Below 1 Ω
E150-20 (RDAM) - L69-2 (DATA)	Always	Below 1 Ω
E150-19 (CSEL) - L69-6 (RSSI)	Always	Below 1 Ω
L69-12 (GND) - Body ground	Always	Below 1 Ω
E150-18 (RCO) or L69-8 (+5) - Body ground	Always	10 kΩ or higher
E150-20 (RDAM) or L69-2 (DATA) - Body ground	Always	10 kΩ or higher
E150-19 (CSEL) or L69-6 (RSSI) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK ENTRY LOCK OPERATION

Connect all connectors and check that the entry lock and unlock functions operate 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

Text in Illustration
*A	for 5 Pin Type
*B	for 12 Pin Type
*a	Component with harness connected (Door Control Receiver)

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

Standard Resistance

for 5 Pin Type
Tester Connection	Condition	Specified Condition
L85-1 (GND) - Body ground	Always	Below 1 Ω

for 12 Pin Type
Tester Connection	Condition	Specified Condition
L69-12 (GND) - Body ground	Always	Below 1 Ω

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

Standard Voltage

for 5 Pin Type
Tester Connection	Condition	Specified Condition
L85-5 (DATA) - L85-1 (GND)	Procedure: Engine switch off All doors closed All doors locked Lock or unlock switch of electrical key transmitter sub-assembly pressed	Below 1 V → Pulse generation (See waveform 1)

for 12 Pin Type
Tester Connection	Condition	Specified Condition
L69-2 (DATA) - L69-12 (GND)	Procedure: Engine switch off All doors closed All doors locked Lock or unlock switch of electrical key transmitter sub-assembly pressed	Below 1 V → Pulse generation (See waveform 1)

Text in Illustration
*a	Before lock or unlock switch of electrical key transmitter sub-assembly pressed
*b	After lock or unlock switch of electrical key transmitter sub-assembly pressed

Using an oscilloscope, check waveform 1.

Note

The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

Waveform 1 (Reference)
Item	Content
Tester Connection	L85-5 (DATA) - L85-1 (GND)1 L69-2 (DATA) - L69-12 (GND)2
Tool Setting	5 V/DIV., 500 ms/DIV.
Condition	Procedure: Engine switch off All doors closed All doors locked Lock or unlock switch of electrical key transmitter sub-assembly pressed

*1 for 5 Pin Type
*2 for 12 Pin Type

REPLACE DOOR CONTROL RECEIVER Click here

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Text in Illustration
*A	for 5 Pin Type
*B	for 12 Pin Type
*a	Component with harness connected (Door Control Receiver)

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

Standard Voltage

for 5 Pin Type
Tester Connection	Condition	Specified Condition
L85-4 (+5) - L85-1 (GND)	Procedure: Engine switch off Electrical key transmitter sub-assembly switch not pressed → pressed	Below 1 V → 4.5 to 6.0 V → Below 1 V
L85-2 (RSSI) - L85-1 (GND)	Procedure: Engine switch off All doors closed	Below 1 V → Pulse generat

for 12 Pin Type
Tester Connection	Condition	Specified Condition
L69-1 (IG) - L69-12 (GND)	Engine switch on (IG)	10 to 16 V
L69-8 (+5) - L69-12 (GND)	Procedure: Engine switch off Electrical key transmitter sub-assembly switch not pressed → pressed	Below 1 V → 4.5 to 6.0 V → Below 1 V
L69-6 (RSSI) - L69-12 (GND)	Procedure: Engine switch off All doors closed	Below 1 V → Pulse generat

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
1. Replace the certification ECU (smart key ECU assembly) and perform registration again.
  
  Tech Tips
  
  Refer to the Service Bulletin.
NEXT

CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

Check that the wireless door lock functions operate normally Click here.

Result
Result	Proceed to
Wireless door lock function operates normally	A
Wireless door lock function does not operate normally (for LHD)	B
Wireless door lock function does not operate normally (for RHD)	C

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

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

INSPECT TRANSMITTER BATTERY
1. 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.
OK
REPLACE ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY

NG
REPLACE TRANSMITTER BATTERY Click here
PERFORM REGISTRATION
1. Perform registration of the B code.
  
  Tech Tips
  
  Refer to the Service Bulletin.
NEXT

CHECK ENTRY DOOR LOCK OPERATION

After B code registration is complete, check that the entry lock and unlock functions operate 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.

Entry&Start
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
B Code	B code registration status / Regd or No Regd	Regd: B code registered correctly No Regd: B code not registered correctly	-

Result
Result	Proceed to
"No Regd" is displayed on the GTS	A
"Regd" is displayed on the GTS (for LHD)	B
"Regd" is displayed on the GTS (for RHD)	C

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.

Entry&Start
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
B Code Difference	B code mismatch / Yes or No	Yes: Communication malfunction No: Communication normal	-

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)

Text in Illustration
*a	Component with harness connected (Certification ECU [Smart Key ECU Assembly])	-	-

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.

Power Source Control
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 and IG) ACC ON: Engine switch on (ACC) IG ON: Engine switch on (IG) ST ON: Sending engine start request signal	-

Standard Voltage

Tester Connection	Condition	Specified Condition
E149-3 (IG1D) - Body ground	Engine switch off	Below 1 V
	Engine switch on (ACC)	Below 1 V
	Engine switch on (IG)	9 V or higher
E151-9 (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

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.

Main Body
Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
ACC SW	Engine switch status / ON or OFF	ON: Engine switch on (ACC) OFF: Engine switch off	"ON" is displayed even though the engine switch is on (IG).
IG SW	Engine switch status / ON or OFF	ON: Engine switch on (IG) OFF: Engine switch off	"OFF" is displayed even though the engine switch is on (ACC).

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 stop.

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 ENTRY LOCK OPERATION

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

Check that the entry lock and unlock functions operate 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)
1. Replace the certification ECU (smart key ECU assembly) with a new one and perform registration again.
  
  Tech Tips
  
  Refer to the Service Bulletin.
NEXT

CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

Check that the wireless door lock functions operate normally Click here.

Result
Result	Proceed to
Wireless door lock function operates normally	A
Wireless door lock function does not operate normally (for LHD)	B
Wireless door lock function does not operate normally (for RHD)	C

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

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

CHECK WAVE ENVIRONMENT

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
The wireless buzzer does not sound	A
The wireless buzzer sounds	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

CHECK WAVE ENVIRONMENT Click here

ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY REGISTRATION (NEW ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY)
1. Register a new electrical key transmitter sub-assembly.
  
  Tech Tips
  
  Refer to the Service Bulletin.
NEXT

CHECK WAVE ENVIRONMENT

Bring another registered electrical key transmitter sub-assembly near the door control receiver and select the failed channel (the channel in which the buzzer did not sound) to recheck key diagnostic mode.

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
The wireless buzzer does not sound	A
The wireless buzzer sounds	B

END (ELECTRICAL KEY TRANSMITTER SUB-ASSEMBLY WAS DEFECTIVE)

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

Disconnect the E150 certification ECU (smart key ECU assembly) connector.
Disconnect the L85*1 and L69*2 door control receiver connector.
- *1: for 5 Pin Type
- *2: for 12 Pin Type

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

Standard Resistance

for 5 Pin Type
Tester Connection	Condition	Specified Condition
E150-19 (CSEL) - L85-2 (RSSI)	Always	Below 1 Ω
E150-19 (CSEL) or L85-2 (RSSI) - Body ground	Always	10 kΩ or higher

for 12 Pin Type
Tester Connection	Condition	Specified Condition
E150-19 (CSEL) - L69-6 (RSSI)	Always	Below 1 Ω
E150-19 (CSEL) or L69-6 (RSSI) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

CHECK ENTRY LOCK OPERATION
1. Connect all connectors and check that the entry lock and unlock functions operate Click here.
NG
END (CONNECTOR WAS NOT CONNECTED SECURELY)

OK

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

Text in Illustration
*A	for 5 Pin Type
*B	for 12 Pin Type
*a	Component with harness connected (Door Control Receiver)

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

Standard Voltage

for 5 Pin Type
Tester Connection	Condition	Specified Condition
L85-2 (RSSI) - L85-1 (GND)	Procedure: Engine switch off All doors closed	Below 1 V → Pulse generation

for 12 Pin Type
Tester Connection	Condition	Specified Condition
L69-6 (RSSI) - L69-12 (GND)	Procedure: Engine switch off All doors closed	Below 1 V → Pulse generation

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

CHECK DOOR CONTROL RECEIVER

Text in Illustration
*A	for 5 Pin Type
*B	for 12 Pin Type
*a	Component with harness connected (Door Control Receiver)

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

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

Standard Voltage

for 5 Pin Type
Tester Connection	Condition	Specified Condition
L85-5 (DATA) - L85-1 (GND)	Procedure: Engine switch off All doors closed All doors locked Lock or unlock switch of electrical key transmitter sub-assembly pressed	Below 1 V → Pulse generation (See waveform 1)

for 12 Pin Type
Tester Connection	Condition	Specified Condition
L69-2 (DATA) - L69-12 (GND)	Procedure: Engine switch off All doors closed All doors locked Lock or unlock switch of electrical key transmitter sub-assembly pressed	Below 1 V → 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).

Text in Illustration
*a	Before lock or unlock switch of electrical key transmitter sub-assembly pressed
*b	After lock or unlock switch of electrical key transmitter sub-assembly pressed

Using an oscilloscope, check waveform 1.

Note

The oscilloscope waveform shown in the illustration is an example for reference only. Noise, chattering, etc. are not shown.

for 5 Pin Type Waveform 1 (Reference)
Item	Content
Tester Connection	L85-5 (DATA) - L85-1 (GND)1 L69-2 (DATA) - L69-12 (GND)2
Tool Setting	5 V/DIV., 500 ms/DIV.
Condition	Procedure: Engine switch off All doors closed All doors locked Lock or unlock switch of electrical key transmitter sub-assembly pressed

*1: for 5 Pin Type
*2: for 12 Pin Type

REPLACE DOOR CONTROL RECEIVER Click here

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
1. Replace the certification ECU (smart key ECU assembly) and perform registration again.
  
  Tech Tips
  
  Refer to the Service Bulletin.
NEXT

CHECK WIRELESS DOOR LOCK CONTROL SYSTEM

Check that the wireless door lock functions operate normally Click here.

Result
Result	Proceed to
Wireless door lock function operates normally	A
Wireless door lock function does not operate normally (for LHD)	B
Wireless door lock function does not operate normally (for RHD)	C

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

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