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

A001AXLE05

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 -
      Result
      Result Proceed to
      Rear door lock LH operates normally OK
      Rear door lock LH does not operate normally NG

    NG

    INSPECT FUSE (D 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 door LH side door is unlocked

      OFF: Rear door 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 normal 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.

    OK

    END (REAR DOOR ECU LH IS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU

  4. INSPECT FUSE (D RR DOOR)


    1. Remove the D RR DOOR fuse from the main body ECU.

    2. Measure the resistance according to the values in the table below.

      Standard resistance
      Tester Connection Condition Specified Condition
      D RR DOOR fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

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

    A00199FE01
    *1 Front view of wire harness connector: (to Rear Door ECU LH)

    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

    A001E7AE02

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

      OK
      w/o Double Locking System
      Measurement Condition Specified Condition

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

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

      		 Lock

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

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

      		 Unlock
      w/ Double Locking System
      Measurement Condition Specified Condition

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

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

      		 Lock

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

      Battery positive (-) → 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)

    A001DGTE02

    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
      O22-1 (UL) - O13-1 (A-) Always Below 1 Ω
      O22-4 (L) - O13-2 (A+) 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
      O22-1 (UL) - O13-1 (A-) Always Below 1 Ω
      O22-2 (L) - O13-2 (A+) Always Below 1 Ω
      O22-1 (UL) - Body ground Always 10 kΩ or higher
      O22-2 (L) - Body ground Always 10 kΩ or higher

    OK

    REPLACE REAR DOOR ECU LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

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

    A001E2DE02

    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)

    A001FHLE01

    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
      O22-6 (LSSR) - O13-14 (LSW) Always Below 1 Ω
      O22-9 (E) - O13-23 (LSWE) 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
      O22-5 (LSSR) - O13-14 (LSW) Always Below 1 Ω
      O22-6 (E) - O13-23 (LSWE) Always Below 1 Ω
      O22-5 (LSSR) - Body ground Always 10 kΩ or higher
      O22-6 (E) - Body ground Always 10 kΩ or higher

    OK

    REPLACE REAR DOOR ECU LH Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR