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

DTC Code DTC Name
No Answer-Back

DESCRIPTION

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

WIRING DIAGRAM

B378413E01

PROCEDURE

  1. CHECK WIRELESS DOOR LOCK CONTROL FUNCTIONS

    1. Check the wireless door lock control function using the door control transmitter assembly.

    Result

    Result

    Proceed to

    Wireless door lock/unlock operates properly

    A

    Wireless door lock/unlock does not operate properly

    B
    B

    GO TO PROBLEM SYMPTOMS TABLE

    Click here

    A

  2. 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 (Proceed to Hazard Warning Switch Circuit)

    Click here

    OK

  3. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - DOOR CONTROL RECEIVER WITH ECU ASSEMBLY)

    1. Disconnect the E12 combination meter assembly connector.

    2. Disconnect the E46 door control receiver with ECU assembly 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 DOOR CONTROL RECEIVER WITH ECU ASSEMBLY

    Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR