SEAT BELT WARNING SYSTEM Front Passenger Side Seat Belt Warning Light Malfunction

DTC Code DTC Name
Front Passenger Side Seat Belt Warning Light Malfunction

DESCRIPTION

Tip:

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

The occupant detection sensor (separate type front seat cushion pad) detects if the passenger seat is occupied and sends signals to the combination meter assembly. The front seat inner belt assembly (for front passenger) detects the passenger seat belt condition and sends signals to the combination meter assembly. After receiving the signals from the occupant detection sensor (separate type front seat cushion pad) and front seat inner belt assembly (for front passenger), the seat belt warning light on the combination meter assembly will blink or go off.

WIRING DIAGRAM

B275873E07

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 / Combination Meter / Data List.

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

      Body Electrical > Combination Meter > Data List

      Tester Display

      Measurement Item

      Range

      Normal Condition

      Diagnostic Note

      P-Seatbelt Buckle SW

      Front passenger seat belt buckle switch signal

      ON or OFF

      OFF: Front passenger seat belt fastened

      ON: Front passenger seat belt not fastened

      The front passenger seat is occupied

      Body Electrical > Combination Meter > Data List

      Tester Display

      P-Seatbelt Buckle SW

    OK

    The GTS display changes correctly in response to the front passenger 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 OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD)

    1. B332793C01

      *a

      Component without harness connected

      (Occupant Detection Sensor (Separate Type Front Seat Cushion Pad))

      Remove the occupant detection sensor (separate type front seat cushion pad).

      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

      1 - 3

      Front passenger seat occupied

      Below 100 Ω

      1 - 3

      Front passenger seat not occupied

      1 MΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD)

    except Sedan:Click here

    for Sedan:Click here

    OK

  3. INSPECT FRONT SEAT INNER BELT ASSEMBLY (FOR FRONT PASSENGER)

    1. B332790C01

      *A

      for LHD

      *B

      for RHD

      *a

      Component without harness connected

      (Front Seat Inner Belt Assembly (for Front Passenger))

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

      except Sedan:Click here

      for Sedan:Click here

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

      Standard Resistance

      Table 1. for LHD

      Tester Connection

      Condition

      Specified Condition

      L16-3 - B-1

      Always

      Below 1 Ω

      L16-2 - B-3

      Front passenger seat belt unfastened

      Below 1 Ω

      L16-2 - B-3

      Front passenger seat belt fastened

      10 kΩ or higher
      Table 2. for RHD

      Tester Connection

      Condition

      Specified Condition

      L15-3 - B-1

      Always

      Below 1 Ω

      L15-2 - B-3

      Front passenger seat belt unfastened

      Below 1 Ω

      L15-2 - B-3

      Front passenger seat belt fastened

      10 kΩ or higher

    Result

    Proceed to

    OK

    NG
    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY (FOR FRONT PASSENGER)

    except Sedan:Click here

    for Sedan:Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - FRONT SEAT INNER BELT ASSEMBLY (FOR FRONT PASSENGER) - BODY GROUND)

    1. Disconnect the E46 combination meter assembly connector.

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

      Standard Resistance

      Table 3. for LHD

      Tester Connection

      Condition

      Specified Condition

      E46-7 (P/SB) - L16-3

      Always

      Below 1 Ω

      E46-7 (P/SB) - Body ground

      Always

      10 kΩ or higher

      L16-2 - Body ground

      Always

      Below 1 Ω
      Table 4. for RHD

      Tester Connection

      Condition

      Specified Condition

      E46-7 (P/SB) - L15-3

      Always

      Below 1 Ω

      E46-7 (P/SB) - Body ground

      Always

      10 kΩ or higher

      L15-2 - Body ground

      Always

      Below 1 Ω

    Result

    Proceed to

    OK

    NG
    OK

    REPLACE COMBINATION METER ASSEMBLY

    except Sedan:Click here

    for Sedan:Click hereClick here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR