POWER DOOR LOCK CONTROL SYSTEM All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch, Driver Side Door Key Cylinder

DESCRIPTION

The main body ECU receives switch signals from the master switch, and driver side door key cylinder switch signals from the front door ECU (for driver side). The main body ECU activates the door lock motor on each door according to these signals.

WIRING DIAGRAM

A000YA0E06
A000YA0E07

PROCEDURE


  1. CHECK DOOR LOCK OPERATION

    Result
    Result Proceed to
    Doors cannot be locked through master switch A
    Doors cannot be locked through driver side door key cylinder B

    B

    READ VALUE USING INTELLIGENT TESTER (DOOR KEY LINKED LOCK AND UNLOCK SWITCH) Click here

    A

  2. CHECK MASTER SWITCH ASSEMBLY (OPERATION)


    1. Replace the master switch 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.

    OK

    END (MASTER SWITCH IS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU

  3. READ VALUE USING INTELLIGENT TESTER (DOOR KEY LINKED LOCK AND UNLOCK SWITCH)


    1. Use the Data List to check if the door key linked lock and unlock switches are functioning properly.

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

      ON: Driver side door key cylinder is turned to lock position

      OFF: Driver side door key cylinder is not turned

      		 -
      Door Key Linked Unlock SW Door key linked unlock switch signal/ON or OFF

      ON: Driver side door key cylinder is turned to unlock position

      OFF: Driver side door key cylinder is not turned

      		 -

      Tech Tips

      *1: for LHD

      *2: for RHD

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

    NG

    INSPECT FRONT DOOR LOCK ASSEMBLY (DOOR KEY LINKED LOCK AND UNLOCK SWITCH) (for Driver Side) Click here

    OK

  4. 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 driver side door key cylinder.

      OK
      All doors can be locked and unlocked with driver side door key cylinder.

    OK

    END (FRONT DOOR ECU IS DEFECTIVE) (for Driver Side)

    NG

    REPLACE MAIN BODY ECU

  5. INSPECT FRONT DOOR LOCK ASSEMBLY (DOOR KEY LINKED LOCK AND UNLOCK SWITCH) (for Driver Side)

    A000Z67E08
    for LHD
    *1 Unlock
    *2 Lock
    *3 Component without harness connected: (Front Door Lock LH)
    A000UK9E02
    for RHD
    *1 Unlock
    *2 Component without harness connected: (Front Door Lock RH)
    *3 Lock

    1. Remove the front door lock (for driver side) Click here.

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

      Standard resistance
      for LHD
      Tester Connection Switch Condition Specified Condition
      9 (L) - 7 (E) Lock Below 1 Ω
      10 (UL) - 7 (E) Unlock Below 1 Ω
      9 (L) - 7 (E) OFF 10 kΩ or higher
      10 (UL) - 7 (E) OFF 10 kΩ or higher
      for RHD
      Tester Connection Switch Condition Specified Condition
      6 (L) - 8 (E) Lock Below 1 Ω
      5 (UL) - 8 (E) Unlock Below 1 Ω
      6 (L) - 8 (E) OFF 10 kΩ or higher
      5 (UL) - 8 (E) OFF 10 kΩ or higher

    NG

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

    OK

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

    A000V41E03

    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
      N9-22 (KUL) - N15-10 (UL) Always Below 1 Ω
      N9-23 (KL) - N15-9 (L) Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      N2-13 (LSWE) - N8-8 (E) Always Below 1 Ω
      N2-22 (KUL) - N8-5 (UL) Always Below 1 Ω
      N2-23 (KL) - N8-6 (L) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  7. 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 driver side door key cylinder.

      OK
      All doors can be locked and unlocked with driver side door key cylinder.

    OK

    END (FRONT DOOR ECU IS DEFECTIVE) (for Driver Side)

    NG

    REPLACE MAIN BODY ECU