Rear Door LH Entry Lock And Unlock Functions Do Not Operate: Procedure

1. Check that the manual door lock and unlock function operates normally.

   OK

   Manual door lock and unlock function operates normally.

NG → GO TO POWER DOOR LOCK CONTROL SYSTEM 

OK: Go to next step 

1. Check the DATA LIST for proper functioning of the door lock position switch.
   MULTIPLEX NETWORK DOOR ECU REAR LH:
   
   

   Tester Display	Measurement Item/Range	Normal Condition	Diagnostic Note
   Door Unlock Detection Switch	Door unlock detection switch / ON or OFF	ON: Door is unlocked OFF: Door is locked	-

   OK

   On the Techstream screen, the display changes between ON and OFF as shown in the chart above.

NG → GO TO POWER DOOR LOCK CONTROL SYSTEM (Proceed to Only Rear Door LH LOCK / UNLOCK Functions do not Operate) 

OK: Go to next step 

1. Select the ACTIVE TEST, use the Techstream to generate a control command, and then check that the oscillator operates.
   CERTIFICATION ECU:
   
   

   Tester Display	Test Part	Control Range	Diagnostic Note
   Dr-Seat Outside Transmitter	Rear LH side transmitter	ON/OFF	-

   OK

   When key is brought close to door oscillator that is OFF, indicator light on key illuminates.

OK → REPLACE CERTIFICATION ECU ASSEMBLY 

NG: Go to next step 

Fig 1: Identifying Terminals Of U33 ECU And R4 Oscillator Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the U33 ECU connector.
2. Disconnect the r4 oscillator connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Specified Condition
   U33-8 (CLG3) - r4-10 (CLG)	Below 1 Ω
   U33-9 (CG3B) - r4-5 (CLGB)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 2: Identifying Antenna R3 Connector & Oscillator R4 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the r4 oscillator connector.
2. Disconnect the r3 antenna connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Specified Condition
   r4-2 (SGT) - r3-6 (SGT)	Below 1 Ω
   r4-3 (ANT1) - r3-5 (ANT1)	Below 1 Ω
   r4-8 (ANT2) - r3-2 (ANT2)	Below 1 Ω
   r4-9 (TRG-) - r3-1 (TRG-)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 3: Identifying Terminals Of O8 ECU And R4 Oscillator Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the r4 oscillator connector.
2. Disconnect the O8 ECU connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Specified Condition
   r4-1 (+B) - O8-7 (OSCB)	Below 1 Ω
   r4-7 (GND) - O8-20 (OSCE)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 4: Identifying Terminals Of O8 ECU And R3 Antenna Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the r3 antenna connector.
2. Disconnect the O8 ECU connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Specified Condition
   r3-3 (TRG+) - O8-18 (TRG+)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. After replacing the electrical key antenna rear LH with a normal one, check that the entry lock and unlock functions operate normally.

   OK

   Entry lock and unlock functions operate normally.

OK → END (ELECTRICAL KEY ANTENNA REAR LH IS DEFECTIVE) 

NG: Go to next step 

1. After replacing the door electrical key oscillator rear LH with a normal one, check that the entry lock and unlock functions operate normally.

   OK

   Entry lock and unlock functions operate normally.

NG → REPLACE CERTIFICATION ECU ASSEMBLY 

OK → END (DOOR ELECTRICAL KEY OSCILLATOR REAR LH IS DEFECTIVE)