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

DTC Code DTC Name
All Doors LOCK/UNLOCK Functions do not Operate Via Master Switch, Driver Side Door Key Cylinder

DESCRIPTION

The main body ECU (instrument panel junction block assembly) receives switch signals from the power window regulator master switch assembly, and driver side door key cylinder switch signals from the front door lock. The main body ECU (instrument panel junction block assembly) activates the door lock motor on each door according to these signals.

WIRING DIAGRAM

B405871E03

CAUTION / NOTICE / HINT

Note:

As the door control battery is installed between the vehicle battery and main body ECU (instrument panel junction block assembly), first perform the inspections in On-Vehicle Inspection to confirm that there are no malfunctions in the power source circuit for the main body ECU (instrument panel junction block assembly) before performing this troubleshooting procedure (Click here).

PROCEDURE

  1. CHECK DOOR LOCK OPERATION

    1. Check the door lock operation.

    Table 1. Result

    Result

    Proceed to

    All doors cannot be locked by power window regulator master switch assembly

    A

    All doors cannot be locked with driver side door key cylinder

    B

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

  2. READ VALUE USING INTELLIGENT TESTER (D-Door Lock Pos SW, P-Door Lock Pos SW)

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

      Table 2. Main Body ECU

      Tester Display

      Measurement Item/Range

      Normal Condition

      Diagnostic Note

      D-Door Lock Pos SW

      Driver side door lock position switch signal / ON or OFF

      ON: Driver side door unlocked

      OFF: Driver side door locked

      -

      P-Door Lock Pos SW

      Front passenger side door lock position switch signal / ON or OFF

      ON: Front passenger side door unlocked

      OFF: Front passenger side door locked

      -

      OK

      On the intelligent tester screen, ON and OFF is displayed for each item according to the table below.

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

  3. REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

    1. Replace the power window regulator master switch assembly with a new or known good one (Click here).

  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).

    END (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY WAS DEFECTIVE)

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

  5. 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.

      Table 3. Main Body ECU

      Tester Display

      Measurement Item/Range

      Normal Condition

      Diagnostic Note

      Door Key Linked Lock SW

      Door key-linked switch lock signal / ON or OFF

      ON: Driver side door key cylinder turned to lock position

      OFF: Driver side door key cylinder not turned

      -

      Door Key Linked Unlock SW

      Door key-linked switch unlock signal / ON or OFF

      ON: Driver side door key cylinder turned to unlock position

      OFF: Driver side door key cylinder not turned

      -

      OK

      On the intelligent tester screen, ON and OFF is displayed for each item according to the table below.

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

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

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

    2. Inspect the front door lock assembly (for Driver Side) (Click here).

    REPLACE FRONT DOOR LOCK ASSEMBLY (for Driver Side)

    (Click here)

  7. CHECK HARNESS AND CONNECTOR (FRONT DOOR LOCK ASSEMBLY [for Driver Side] - MAIN BODY ECU AND BODY GROUND)

    1. Disconnect the K9*1 or J7*2 front door lock assembly (for Driver Side) connector.

    2. Disconnect the DH main body ECU (instrument panel junction block assembly) connector

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

      Standard Resistance

      for LHD

      Tester Connection

      Condition

      Specified Condition

      K9-10 (UL) - DH-6 (UL2)

      Always

      Below 1 Ω

      K9-9 (L) - DH-7 (L2)

      Always

      Below 1 Ω

      K9-7 (E) - Body ground

      Always

      Below 1 Ω

      K9-10 (UL) or DH-6 (UL2) - Body ground

      Always

      10 kΩ or higher

      K9-9 (L) or DH-7 (L2) - Body ground

      Always

      10 kΩ or higher

      for RHD

      Tester Connection

      Condition

      Specified Condition

      J7-5 (UL) - DH-6 (UL2)

      Always

      Below 1 Ω

      J7-6 (L) - DH-7 (L2)

      Always

      Below 1 Ω

      J7-8 (E) - Body ground

      Always

      Below 1 Ω

      J7-5 (UL) or DH-6 (UL2) - Body ground

      Always

      10 kΩ or higher

      J7-6 (L) or DH-7 (L2) - Body ground

      Always

      10 kΩ or higher

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPAIR OR REPLACE HARNESS OR CONNECTOR