POWER DOOR LOCK CONTROL SYSTEM All Doors LOCK/UNLOCK Functions do not Operate Via Door Control Switch or Door Key Cylinder

DESCRIPTION

The main body ECU (multiplex network body ECU) receives switch signals from the multiplex network master switch assembly and driver door key cylinder lock or unlock switch signals from the front door lock assembly RH. The main body ECU (multiplex network body ECU) activates the door lock motor on each door according to these signals.

WIRING DIAGRAM

A0004H4E53
*1 Multiplex Network Master Switch Assembly
*2 Main Body ECU (Multiplex Network Body ECU)
*3 Front Door Lock Assembly LH
*4 LIN Communication Line

CAUTION / NOTICE / HINT

Note

If the main body ECU (multiplex network body ECU) is replaced, refer to Service Bulletin.

PROCEDURE


  1. CHECK DOOR LOCK OPERATION


    1. Check door lock operation Click here.

      Result
      Result Proceed to
      All doors cannot be locked through multiplex network master switch A
      All doors cannot be locked through driver door key cylinder B

    B

    READ VALUE USING GTS (DOOR KEY-LINKED LOCK AND UNLOCK SWITCH) Click here

    A

  2. CHECK DTC OUTPUT (LIN COMMUNICATION SYSTEM)


    1. Clear the DTC Click here.

    2. Recheck for DTCs.

      OK
      DTC B1206 is not output.

    NG

    GO TO LIN COMMUNICATION SYSTEM (DTC B1206) Click here

    OK

  3. REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY


    1. Replace the multiplex network master switch assembly Click here.


    NEXT

  4. CHECK DOOR LOCK OPERATION


    1. Check that all doors can be locked and unlocked by using the multiplex network master switch assembly Click here.

      OK
      All doors can be locked and unlocked with the multiplex network master switch assembly.

    OK

    END (MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY WAS DEFECTIVE)

    NG

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

  5. READ VALUE USING GTS (DOOR KEY-LINKED LOCK AND UNLOCK SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. Read the Data List according to the display on the GTS.

      Main Body
      Tester Display Measurement Item / Range Normal Condition Diagnostic Note
      Door Key SW-Lock Driver door key-linked lock/unlock switch lock signal / ON or OFF

      ON: Driver door key cylinder turned to lock position

      OFF: Driver door key cylinder not turned to lock position

      		 -
      Door Key SW-Unlock Driver door key-linked lock/unlock switch unlock signal / ON or OFF

      ON: Driver door key cylinder turned to unlock position

      OFF: Driver door key cylinder not turned to unlock position

      		 -
      OK
      The GTS indicates ON or OFF according to the key cylinder operation shown in the table.

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

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


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

    2. A0009L8E04
      Text in Illustration
      *a

      Component without harness connected

      (Front Door Lock Assembly (for Driver Door))
      *b Unlock
      *c Lock

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      9 (L) - 7 (E) Locked Below 1 Ω
      9 (L) - 7 (E) off 10 kΩ or higher
      10 (UL) - 7 (E) Unlocked Below 1 Ω
      10 (UL) - 7 (E) off 10 kΩ or higher

    NG

    REPLACE FRONT DOOR LOCK ASSEMBLY (for DRIVER DOOR) Click here

    OK

  7. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))


    1. Disconnect the H10 main body ECU (multiplex network body ECU) connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M1-9 (L) - H10-11 (L2) Always Below 1 Ω
      M1-10 (UL) - H10-24 (UL3) Always Below 1 Ω
      M1-7 (E) - Body ground Always Below 1 Ω
      H10-11 (L2) - Body ground Always 10 kΩ or higher
      H10-24 (UL3) - Body ground Always 10 kΩ or higher

    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR