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

DESCRIPTION

The occupant detection sensor (separate type front seat cushion pad) detects if the passenger seat is occupied and sends signals to the combination meter sub-assembly. The front seat inner belt assembly (for Front Passenger) detects the passenger seat belt condition and sends signals to the combination meter sub-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 in the combination meter sub-assembly will blink or go off.

Tech Tips

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

WIRING DIAGRAM

A005BR8E21

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.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      P-Seatbelt Buckle SW Front passenger seat belt buckle switch signal/ON or OFF

      ON: Front passenger seat belt unfastened

      OFF: Front passenger seat belt fastened

      		 -
      OK
      ON or OFF appears on the tester screen according to the front passenger seat belt condition.

    OK

    REPLACE METER CIRCUIT PLATE Click here

    NG

  2. CHECK HARNESS AND CONNECTOR (METER CIRCUIT PLATE - FRONT SEAT INNER BELT ASSEMBLY (FOR FRONT PASSENGER) - BODY GROUND)


    1. Disconnect the L27 meter circuit plate connector.

    2. Disconnect the S23*1 or R33*2 front seat inner belt assembly (for Front Passenger) connector.

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


      • *1: for LHD

      • *2: for RHD

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      L27-29 (SW) - S23-3 (+) Always Below 1 Ω
      L27-29 (SW) - Body ground Always 10 kΩ or higher
      S23-2 (E) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      L27-29 (SW) - R33-3 (+) Always Below 1 Ω
      L27-29 (SW) - Body ground Always 10 kΩ or higher
      R33-2 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A005AFFE01
      Text in Illustration
      *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) 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

    NG

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

    OK

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


    1. A005B44E02
      Text in Illustration
      *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) Click here.

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      S23-3 - B-1 Always Below 1 Ω
      S23-2 - B-3 Front passenger seat belt unfastened Below 1 Ω
      S23-2 - B-3 Front passenger seat belt fastened 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      R33-3 - B-1 Always Below 1 Ω
      R33-2 - B-3 Front passenger seat belt unfastened Below 1 Ω
      R33-2 - B-3 Front passenger seat belt fastened 10 kΩ or higher

    OK

    REPLACE METER CIRCUIT PLATE Click here

    NG

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