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

DESCRIPTION

The front door ECU (for driver side) receives lock/unlock switch signals and activates the door lock motor according to these signals.

WIRING DIAGRAM

A01GY40E03
A01GY40E04

INSPECTION PROCEDURE

PROCEDURE


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


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

      Driver Door (Front door ECU LH*1) (Front door ECU RH*2)
      Tester Display Test Part Control Range Diagnostic Note
      Door Lock Operate door lock motor LOCK or UNLOCK -

      Tech Tips

      *1: for LHD

      *2: for RHD

      OK
      Front door lock (for driver side) operates normally

    NG

    INSPECT FUSE (D DOOR 1, D DOOR 2) 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.

      Driver Door (Front door ECU LH*1) (Front door ECU RH*2)
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      Lock Position SW Driver side door lock position switch signal/ON or OFF

      ON: Driver side door is unlocked

      OFF: Driver side door is locked

      		 -

      Tech Tips

      *1: for LHD

      *2: for RHD

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

    NG

    INSPECT FRONT DOOR LOCK ASSEMBLY (DOOR LOCK POSITION SWITCH) (for Driver Side) Click here

    OK

  3. CHECK FRONT DOOR ECU (OPERATION) (for Driver Side)


    1. Replace the front door ECU (for driver side) 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 (FRONT DOOR ECU IS DEFECTIVE) (for Driver Side)

  4. INSPECT FUSE (D DOOR 1, D DOOR 2)


    1. Remove the D DOOR 1 and D DOOR 2 fuses 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 DOOR 1 fuse Always Below 1 Ω
      D DOOR 2 fuse Always Below 1 Ω

    NG

    REPLACE FUSE

    OK

  5. CHECK HARNESS AND CONNECTOR (FRONT DOOR ECU - BATTERY) (for Driver Side)

    A01GY8KE05

    1. Disconnect the N10 or N1 ECU connector.

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

      Standard voltage
      for LHD
      Tester Connection Condition Specified Condition
      N10-6 (BDR) - Body ground Always 11 to 14 V
      N10-16 (BDG1) - Body ground Always 11 to 14 V
      for RHD
      Tester Connection Condition Specified Condition
      N1-6 (BDR) - Body ground Always 11 to 14 V
      N1-16 (BDG1) - Body ground Always 11 to 14 V

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  6. INSPECT FRONT DOOR LOCK ASSEMBLY (for Driver Side)

    A01H0SQE05

    1. for LHD:


      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 4 (L)

        Battery negative (-) → Terminal 1 (UL)

        		 Lock

        Battery positive (+) → Terminal 1 (UL)

        Battery negative (-) → Terminal 4 (L)

        		 Unlock
        w/ Double Locking System
        Measurement Condition Specified Condition

        Battery positive (+) → Terminal 4 (L)

        Battery negative (-) → Terminal 3 (UL)

        		 Lock

        Battery positive (+) → Terminal 3 (UL)

        Battery negative (-) → Terminal 4 (L)

        		 Unlock
      A01H1K9E07

    2. for RHD:


      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 4 (L)

        Battery negative (-) → Terminal 1 (UL)

        		 Lock

        Battery positive (+) → Terminal 1 (UL)

        Battery negative (-) → Terminal 4 (L)

        		 Unlock
        w/ Double Locking System
        Measurement Condition Specified Condition

        Battery positive (+) → Terminal 2 (L)

        Battery negative (-) → Terminal 1 (UL)

        		 Lock

        Battery positive (+) → Terminal 1 (UL)

        Battery negative (-) → Terminal 2 (L)

        		 Unlock

    NG

    REPLACE FRONT DOOR LOCK ASSEMBLY (for Driver Side) Click here

    OK

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

    A01GXO5E29

    1. for LHD:


      1. Disconnect the N9 ECU connector.

      2. Disconnect the N15 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
        N9-1 (A-) - N15-1 (UL) Always Below 1 Ω
        N9-2 (A+) - N15-4 (L) Always Below 1 Ω
        N15-1 (UL) - Body ground Always 10 kΩ or higher
        N15-4 (L) - Body ground Always 10 kΩ or higher
        w/ Double Locking System
        Tester Connection Condition Specified Condition
        N9-1 (A-) - N15-3 (UL) Always Below 1 Ω
        N9-2 (A+) - N15-4 (L) Always Below 1 Ω
        N15-3 (UL) - Body ground Always 10 kΩ or higher
        N15-4 (L) - Body ground Always 10 kΩ or higher
      A01GXO5E30

    2. for RHD:


      1. Disconnect the N2 ECU connector.

      2. Disconnect the N8 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
        N2-1 (A-) - N8-1 (UL) Always Below 1 Ω
        N2-2 (A+) - N8-4 (L) Always Below 1 Ω
        N8-1 (UL) - Body ground Always 10 kΩ or higher
        N8-4 (L) - Body ground Always 10 kΩ or higher
        w/ Double Locking System
        Tester Connection Condition Specified Condition
        N2-1 (A-) - N8-1 (UL) Always Below 1 Ω
        N2-2 (A+) - N8-2 (L) Always Below 1 Ω
        N8-1 (UL) - Body ground Always 10 kΩ or higher
        N8-2 (L) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT DOOR ECU (for Driver Side) Click here

  8. INSPECT FRONT DOOR LOCK ASSEMBLY (DOOR LOCK POSITION SWITCH) (for Driver Side)

    A01H0SQE02

    1. for LHD:


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

        Standard resistance
        Tester Connection Switch Condition Specified Condition
        N15-7 (E) - N15-8 (LSSR) Unlock Below 1 Ω
        N15-7 (E) - N15-8 (LSSR) Lock 10 kΩ or higher
      A01H1K9E02

    2. for RHD:


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

        Standard resistance
        Tester Connection Switch Condition Specified Condition
        N8-7 (LSSR) - N8-8 (E) Unlock Below 1 Ω
        N8-7 (LSSR) - N8-8 (E) Lock 10 kΩ or higher

    NG

    REPLACE FRONT DOOR LOCK ASSEMBLY (for Driver Side) Click here

    OK

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

    A01GXO5E22

    1. Disconnect the N9 or N2 ECU connector.

    2. Disconnect the N15 or N8 door lock connector.

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

      Standard resistance
      for LHD
      Tester Connection Condition Specified Condition
      N9-13 (LSWE) - N15-7 (E) Always Below 1 Ω
      N9-25 (LSW) - N15-8 (LSSR) Always Below 1 Ω
      N9-13 (LSWE) - Body ground Always 10 kΩ or higher
      N9-25 (LSW) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      N2-13 (LSWE) - N8-8 (E) Always Below 1 Ω
      N2-25 (LSW) - N8-7 (LSSR) Always Below 1 Ω
      N2-13 (LSWE) - Body ground Always 10 kΩ or higher
      N2-25 (LSW) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE FRONT DOOR ECU (for Driver Side) Click here