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

DESCRIPTION

The occupant detection sensor (separate type front seat cushion pad*1 or front seat cushion pad with cover (front passenger seat)*2) detects if the passenger seat is occupied and sends signals to the combination meter assembly. The front seat inner belt assembly (front passenger seat) 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*1 or front seat cushion pad with cover (front passenger seat)*2) and front seat inner belt assembly (front passenger seat), the seat belt warning light on the combination meter assembly will blink or go off.


WIRING DIAGRAM

B003YG1E01

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

PROCEDURE


  1. READ VALUE USING GTS


    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

      		 -
      Passenger Occupant Detection Switch Occupant detection sensor signal ON or OFF

      ON: Front passenger seat occupied

      OFF: Front passenger seat not occupied

      		 -

      Body Electrical > Combination Meter > Data List
      Tester Display
      P-Seatbelt Buckle SW
      Passenger Occupant Detection Switch
      OK
      The GTS display changes correctly in response to the front passenger seat belt and front passenger seat condition.
      Result
      Result Proceed to
      OK A
      NG (P-Seatbelt Buckle SW) B
      NG (Passenger Occupant Detection Switch) C

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

    C

    INSPECT FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT) Click here

    B

  2. INSPECT FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT)


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

      Click here

    2. Inspect the front seat inner belt assembly (front passenger seat) (seat belt warning switch).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT) Click here

    OK

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


    1. Disconnect the K3 combination meter assembly connector.

    2. Disconnect the P2*1 or Q11*2 front seat inner belt assembly (front passenger seat) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      K3-6 (PBKL) - P2-3 (+) Always Below 1 Ω
      K3-6 (PBKL) - Body ground Always 10 kΩ or higher
      P2-3 (+) - Body ground Always 10 kΩ or higher
      P2-2 (E) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      K3-6 (PBKL) - Q11-3 (+) Always Below 1 Ω
      K3-6 (PBKL) - Body ground Always 10 kΩ or higher
      Q11-3 (+) - Body ground Always 10 kΩ or higher
      Q11-2 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  4. INSPECT FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT)


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

      Click here

    2. Inspect the front seat inner belt assembly (front passenger seat) (occupant detection sensor line).

      Click here

      Result
      Result Proceed to
      OK (for Standard Seat Type) A
      OK (for Sports Seat Type) B
      NG C

    B

    INSPECT OCCUPANT DETECTION SENSOR (FRONT SEAT CUSHION PAD WITH COVER (FRONT PASSENGER SEAT)) Click here

    C

    REPLACE FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SEAT) Click here

    A

  5. INSPECT OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD)


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

      Click here

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

      Click here

      Result
      Proceed to
      OK
      NG

    OK

    GO TO STEP 7 Click here

    NG

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

  6. INSPECT OCCUPANT DETECTION SENSOR (FRONT SEAT CUSHION PAD WITH COVER (FRONT PASSENGER SEAT))


    1. Remove the occupant detection sensor (front seat cushion pad with cover (front passenger seat)).

      Click here

    2. Inspect the occupant detection sensor (front seat cushion pad with cover (front passenger seat)).

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE OCCUPANT DETECTION SENSOR (FRONT SEAT CUSHION PAD WITH COVER (FRONT PASSENGER SEAT)) Click here

    OK

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


    1. Disconnect the K3 combination meter assembly connector.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      K3-7 (PODS) - P2-5 (+) Always Below 1 Ω
      K3-7 (PODS) - Body ground Always 10 kΩ or higher
      P2-5 (+) - Body ground Always 10 kΩ or higher
      P2-4 (E) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      K3-7 (PODS) - Q11-5 (+) Always Below 1 Ω
      K3-7 (PODS) - Body ground Always 10 kΩ or higher
      Q11-5 (+) - Body ground Always 10 kΩ or higher
      Q11-4 (E) - Body ground Always Below 1 Ω
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR