Driver Side Door 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 MASTER SWITCH ASSEMBLY:
   
   

   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 Driver Door 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
   D-Seat Outside Transmitter	Driver 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 U28 ECU And P4 Oscillator Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the U28 ECU connector.
2. Disconnect the p4 oscillator connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Specified Condition
   U28-33 (CLG1) - p4-10 (CLG)	Below 1 Ω
   U28-34 (CG1B) - p4-5 (CLGB)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 2: Identifying Antenna P3 Connector & Oscillator P4 Connector

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the p4 oscillator connector.
2. Disconnect the p3 antenna connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Specified Condition
   p4-2 (SGT) - p3-6 (SGT)	Below 1 Ω
   p4-3 (ANT1) - p3-5 (ANT1)	Below 1 Ω
   p4-8 (ANT2) - p3-2 (ANT2)	Below 1 Ω
   p4-9 (TRG-) - p3-1 (TRG-)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 3: Identifying Terminals Of P4 Oscillator And M10 ECU Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the p4 oscillator connector.
2. Disconnect the M10 ECU connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Specified Condition
   p4-1 (+B) - M10-7 (OSCB)	Below 1 Ω
   p4-7 (GND) - M10-20 (OSCE)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

Fig 4: Identifying Terminals Of M10 ECU And P3 Oscillator Connectors

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the p3 oscillator connector.
2. Disconnect the M10 ECU connector.
3. Measure the resistance of the wire harness side connector.

   Standard resistance

   Tester Connection	Specified Condition
   p3-3 (TRG+) - M10-18 (TRG+)	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: Go to next step 

1. After replacing the electrical key antenna front 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 FRONT LH IS DEFECTIVE) 

NG: Go to next step 

1. After replacing the door electrical key oscillator front 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 FRONT LH IS DEFECTIVE)