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

DESCRIPTION

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

WIRING DIAGRAM


  1. for LHD

    A01MFL7E02

  2. for RHD

    A01MGCHE01

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 here

  • When replacing the combination meter assembly, make sure to replace it with a new one.

PROCEDURE


  1. READ VALUE USING GTS (P-Seatbelt Buckle SW)


    1. Connect the GTS to the DLC3.

    2. Turn the power switch on (IG).

    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

      		 Perform the inspection while sitting in the front passenger side seat.

      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 and front passenger seat condition.
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (FRONT SEAT INNER BELT ASSEMBLY [for Front Passenger Side] - COMBINATION METER ASSEMBLY AND BODY GROUND)


    1. Disconnect the Q43 (for LHD) or P20 (for RHD) front seat inner belt assembly (for Front Passenger Side) connector.

    2. Disconnect the G13 combination meter assembly connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      Q43-3 (+) - G13-14 (PBKL) Always Below 1 Ω
      Q43-3 (+) or G13-14 (PBKL) - Body ground Always 10 kΩ or higher
      Q43-2 (E) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      P20-3 (+) - G13-14 (PBKL) Always Below 1 Ω
      P20-3 (+) or G13-14 (PBKL) - Body ground Always 10 kΩ or higher
      P20-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT FRONT SEAT INNER BELT ASSEMBLY (for Front Passenger Side)


    1. Remove the front seat inner belt assembly (for Front Passenger Side).

      Click here

    2. Inspect the front seat inner belt assembly (for Front Passenger Side).

      Click here

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY (for Front Passenger Side) Click here

    OK

  4. INSPECT FRONT SEAT INNER BELT ASSEMBLY (for Front Passenger Side)


    1. Remove the front seat cushion pad with cover (for Front Passenger Side).

      Click here

    2. Inspect the front seat cushion pad with cover (for Front Passenger Side).

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPLACE FRONT SEAT CUSHION WITH COVER PAD (for Front Passenger Side) Click here