POWER DOOR LOCK CONTROL SYSTEM Only Rear Door LH LOCK / UNLOCK Functions do not Operate

DESCRIPTION

The rear door ECU LH receives lock/unlock switch signals and activates the door lock motor according to these signals.

WIRING DIAGRAM

A01GZQ7E08

INSPECTION PROCEDURE

PROCEDURE


  1. PERFORM ACTIVE TEST USING INTELLIGENT TESTER (REAR DOOR LOCK LH)


    1. Select the Active Test, use the intelligent tester to generate a control command, and then check the door lock motor function.

      Rear Left Door (Rear door ECU LH)
      Item Test Part Control Range Diagnostic Note
      Door Lock Operate door lock motor LOCK/UNLOCK -
      OK
      Rear door lock LH operates normally.

    NG

    INSPECT FUSE (D RR DOOR or P RR DOOR) Click here

    OK

  2. READ VALUE USING INTELLIGENT TESTER (DOOR LOCK POSITION SWITCH)


    1. Use the Data List to check if the door lock position switch is functioning properly.

      Rear Left Door (Rear door ECU LH)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Lock Pos SW Rear LH side door lock position switch signal/ON or OFF

      ON: Rear LH side door is unlocked

      OFF: Rear LH side door is locked

      		 -
      OK
      On tester screen, item changes between ON and OFF according to above chart.

    NG

    INSPECT REAR DOOR LOCK ASSEMBLY LH (DOOR LOCK POSITION SWITCH) Click here

    OK

  3. CHECK REAR DOOR ECU LH (OPERATION)


    1. Replace the rear door ECU LH with a normally functioning one Click here.

    2. Check that all doors can be locked and unlocked by using the master switch.

      OK
      All doors can be locked and unlocked with master switch.

    NG

    REPLACE MAIN BODY ECU

    OK

    END (REAR DOOR ECU LH IS DEFECTIVE)

  4. INSPECT FUSE (D RR DOOR or P RR DOOR)


    1. Remove the D RR DOOR*1 or P RR DOOR*2 fuse from the main body ECU.

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

      Standard resistance
      Tester Connection Condition Specified Condition

      D RR DOOR fuse*1

      P RR DOOR fuse*2

      		 Always Below 1 Ω

      Tech Tips

      *1: for LHD

      *2: for RHD


    NG

    REPLACE FUSE

    OK

  5. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU LH - BATTERY)

    A01GXJSE03

    1. Disconnect the O14 ECU connector.

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

      Standard voltage
      Tester Connection Condition Specified Condition
      O14-6 (BDR) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT REAR DOOR LOCK ASSEMBLY LH

    A01GW8ZE01

    1. Apply battery voltage to the door lock motor and check the operation of the door lock motor.

      OK
      w/o Double Locking System
      Measurement Condition Specified Condition

      Battery positive (+) → Terminal O22-4 (L)

      Battery negative (-) → Terminal O22-1 (UL)

      		 Lock

      Battery positive (+) → Terminal O22-1 (UL)

      Battery negative (-) → Terminal O22-4 (L)

      		 Unlock
      w/ Double Locking System
      Measurement Condition Specified Condition

      Battery positive (+) → Terminal O22-2 (L)

      Battery negative (-) → Terminal O22-1 (UL)

      		 Lock

      Battery positive (+) → Terminal O22-1 (UL)

      Battery negative (-) → Terminal O22-2 (L)

      		 Unlock

    NG

    REPLACE REAR DOOR LOCK ASSEMBLY LH Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU LH - REAR DOOR LOCK LH)

    A01GWYTE30

    1. Disconnect the O13 ECU connector.

    2. Disconnect the O22 door lock connector.

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

      Standard resistance
      w/o Double Locking System
      Tester Connection Condition Specified Condition
      O13-1 (A-) - O22-1 (UL) Always Below 1 Ω
      O13-2 (A+) - O22-4 (L) Always Below 1 Ω
      O22-1 (UL) - Body ground Always 10 kΩ or higher
      O22-4 (L) - Body ground Always 10 kΩ or higher
      w/ Double Locking System
      Tester Connection Condition Specified Condition
      O13-1 (A-) - O22-1 (UL) Always Below 1 Ω
      O13-2 (A+) - O22-2 (L) Always Below 1 Ω
      O22-1 (UL) - Body ground Always 10 kΩ or higher
      O22-2 (L) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE REAR DOOR ECU LH Click here

  8. INSPECT REAR DOOR LOCK ASSEMBLY LH (DOOR LOCK POSITION SWITCH)

    A01GW8ZE02

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

      Standard resistance
      w/o Double Locking System
      Tester Connection Switch Condition Specified Condition
      O22-6 (LSSR) - O22-9 (E) Unlock Below 1 Ω
      O22-6 (LSSR) - O22-9 (E) Lock 10 kΩ or higher
      w/ Double Locking System
      Tester Connection Switch Condition Specified Condition
      O22-5 (LSSR) - O22-6 (E) Unlock Below 1 Ω
      O22-5 (LSSR) - O22-6 (E) Lock 10 kΩ or higher

    NG

    REPLACE REAR DOOR LOCK ASSEMBLY LH Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (REAR DOOR ECU LH - REAR DOOR LOCK LH)

    A01GWYTE31

    1. Disconnect the O13 ECU connector.

    2. Disconnect the O22 door lock connector.

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

      Standard resistance
      w/o Double Locking System
      Tester Connection Condition Specified Condition
      O13-14 (LSW) - O22-6 (LSSR) Always Below 1 Ω
      O13-23 (LSWE) - O22-9 (E) Always Below 1 Ω
      O22-6 (LSSR) - Body ground Always 10 kΩ or higher
      O22-9 (E) - Body ground Always 10 kΩ or higher
      w/ Double Locking System
      Tester Connection Condition Specified Condition
      O13-14 (LSW) - O22-5 (LSSR) Always Below 1 Ω
      O13-23 (LSWE) - O22-6 (E) Always Below 1 Ω
      O22-5 (LSSR) - Body ground Always 10 kΩ or higher
      O22-6 (E) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE REAR DOOR ECU LH Click here