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

WIRING DIAGRAM

A01I4QLE33

INSPECTION PROCEDURE

Note

The power door lock control system uses the LIN communication system. Inspect the communication function by following How to Proceed with Troubleshooting. Troubleshoot the power door lock control system after confirming that the communication systems are functioning properly Click here.

PROCEDURE


  1. CHECK DOOR LOCK OPERATION


    1. Check door lock operation Click here.

      Result
      Result Proceed to
      All doors cannot be locked through door control switch (power window regulator switch assembly) A
      All doors cannot be locked through door key cylinder B

    B

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

    A

  2. CHECK FOR DTC (LIN COMMUNICATION SYSTEM)


    1. Clear the DTCs 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 POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY


    1. Replace the power window regulator master switch assembly Click here.


    NG

    REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY Click here

    OK

  4. CHECK DOOR LOCK OPERATION


    1. Check that all doors can be locked and unlocked by the power window regulator master switch assembly Click here

      OK
      All doors can be locked and unlocked by the power window regulator master switch assembly.

    NG

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

    OK

    END (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY WAS DEFECTIVE)

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


    1. Connect the Techstream to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the Techstream on.

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

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

      Main Body (Main Body ECU (Multiplex Network Body ECU))
      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

      		 -
      D Door Key SW-UL 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 Techstream indicates ON or OFF according to the key cylinder operation shown in the table.

    NG

    INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH Click here

    OK

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

  6. INSPECT FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH


    1. Remove the front door lock with motor assembly LH Click here.

    2. Inspect the front door lock with motor assembly LH Click here.


    NG

    REPLACE FRONT DOOR LOCK WITH MOTOR ASSEMBLY LH Click here

    OK

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


    1. Disconnect the I13 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
      K1-9 (L) - I13-11 (L2) Always Below 1 Ω
      K1-10 (UL) - I13-24 (UL3) Always Below 1 Ω
      K1-7 (E) - Body ground Always Below 1 Ω
      K1-9 (L) - Body ground Always 10 kΩ or higher
      K1-10 (UL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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