WIRELESS DOOR LOCK CONTROL SYSTEM(w/ Entry and Start System) No Answer-Back

DTC Code DTC Name
No Answer-Back

DESCRIPTION

In some cases, the wireless door lock control functions may be normal but the hazard warning light function do not operate. In such cases, the hazard warning light signal outputs from the body ECU may be malfunctioning.

WIRING DIAGRAM

B330112E03
B330112E05

CAUTION / NOTICE / HINT

Note:

  • When replacing the certification ECU (smart key ECU assembly), refer to Service Bulletin.

  • Before performing the inspection, check that DTC B27B0 (Entry and Start System) is not output.

    Click here

PROCEDURE

  1. CHECK WIRELESS DOOR LOCK CONTROL FUNCTION

    1. Check the wireless door lock control function using the electrical key transmitter sub-assembly.

    Result

    Result

    Proceed to

    Wireless door lock/unlock functions operate properly.

    A

    Wireless door lock/unlock functions do not operate properly.

    B
    B

    GO TO ENTRY AND START SYSTEM (for Entry Function)

    Click here

    A

  2. INSPECT FRONT DOOR LOCK ASSEMBLY

    1. for LHD

      1. Remove the front door lock assembly LH

        Click here

      2. Inspect the front door lock assembly LH.

        Click here

    2. for RHD

      1. Remove the front door lock assembly RH

        Click here

      2. Inspect the front door lock assembly RH.

        Click here

    Result

    Result

    Proceed to

    OK

    A

    NG (for LHD)

    B

    NG (for RHD)

    C
    B

    REPLACE FRONT DOOR LOCK ASSEMBLY LH

    Click here

    C

    REPLACE FRONT DOOR LOCK ASSEMBLY RH

    Click here

    A

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

    1. Disconnect the H2 front door lock assembly LH connector.*1

    2. Disconnect the G2 front door lock assembly RH connector.*2

      • *1: for LHD

      • *2: for RHD

    3. Disconnect the E46 body ECU connector.

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

      Standard Resistance

      Table 1. for LHD

      Tester Connection

      Condition

      Specified Condition

      H2-6 (DLSR) - E46-15 (LSWD)

      Always

      Below 1 Ω

      H2-7 (E) - Body ground

      Always

      Below 1 Ω

      H2-6 (DLSR) or E46-15 (LSWD) - Body ground

      Always

      10 kΩ or higher

      Standard Resistance

      Table 2. for RHD

      Tester Connection

      Condition

      Specified Condition

      G2-9 (DLSR) - E46-15 (LSWD)

      Always

      Below 1 Ω

      G2-8 (E) - Body ground

      Always

      Below 1 Ω

      G2-9 (DLSR) or E46-15 (LSWD) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. CHECK HAZARD WARNING LIGHTS OPERATION

    1. Check that the hazard warning lights blink when the hazard warning signal switch is pressed.

      OK

      Hazard warning lights blink.

    Result

    Proceed to

    OK

    NG
    NG

    GO TO LIGHTING SYSTEM (EXT) (PROCEED TO HAZARD WARNING SWITCH CIRCUIT)

    Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BODY ECU)

    1. Disconnect the E12 combination meter assembly connector.

    2. Disconnect the E46 body ECU connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      E12-1 (HAZ) - E46-6 (HAZ)

      Always

      Below 1 Ω

      E12-1 (HAZ) or E46-6 (HAZ) - Body ground

      Always

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE BODY ECU

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR