SEAT BELT WARNING SYSTEM Driver Side Seat Belt Warning Light does not Operate

DTC Code DTC Name
Driver Side Seat Belt Warning Light does not Operate

DESCRIPTION

Tip:

The seat belt warning light on the combination meter assembly is used for both the driver seat and front passenger seat.

The combination meter assembly blinks or turns off the seat belt warning light on the combination meter assembly in accordance with the state of the front seat inner belt assembly (for driver).

WIRING DIAGRAM

B287218E12

CAUTION / NOTICE / HINT

Note:

The seat belt warning system uses the CAN communication system. First, confirm that there are no malfunctions in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

Click hereClick here

PROCEDURE

  1. READ VALUE USING GTS

    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    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.

      Body Electrical > Main Body > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      D Seat Buckle SW

      Driver seat belt buckle switch

      ON or OFF

      ON: Driver seat belt unfastened

      OFF: Driver seat belt fastened

      -

      Body Electrical > Main Body > Data List

      Tester Display

      D Seat Buckle SW

    OK

    The GTS display changes correctly in response to the driver seat belt condition.

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE COMBINATION METER ASSEMBLY

    except Sedan:Click here

    for Sedan:Click hereClick here

    NG

  2. INSPECT FRONT SEAT INNER BELT ASSEMBLY (FOR DRIVER)

    1. B332789C01

      *a

      Component without harness connected

      (Front Seat Inner Belt Assembly (for Driver))

      Remove the front seat inner belt assembly (for driver).

      except Sedan:Click here

      for Sedan:Click here

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      2 - 3

      Driver seat belt unfastened

      Below 1 Ω

      2 - 3

      Driver seat belt fastened

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY (FOR DRIVER)

    except Sedan:Click here

    for Sedan:Click here

    OK

  3. INSPECT INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    1. Remove the main body ECU (multiplex network body ECU).

      for LHD:Click here

      for RHD:Click here

      B332792C01

      *a

      Component without harness connected

      (Instrument Panel Junction Block Assembly)

      -

      -

    2. Disconnect the 3E instrument panel junction block assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      MB-18 (DBKL) - 3E-36

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

    for LHD:Click here

    for RHD:Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - FRONT SEAT INNER BELT ASSEMBLY (FOR DRIVER) - BODY GROUND)

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

      Standard Resistance

      Table 1. for LHD

      Tester Connection

      Condition

      Specified Condition

      3E-36 - L15-3

      Always

      Below 1 Ω

      L15-3 - Body ground

      Always

      10 kΩ or higher

      L15-2 - Body ground

      Always

      Below 1 Ω
      Table 2. for RHD

      Tester Connection

      Condition

      Specified Condition

      3E-36 - L16-3

      Always

      Below 1 Ω

      L16-3 - Body ground

      Always

      10 kΩ or higher

      L16-2 - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

    for LHD:Click here

    for RHD:Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR