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 assembly. The front seat inner belt assembly (front passenger seat) detects the front 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 (front passenger seat), the seat belt warning light on the combination meter assembly will blink or go off.

Tech Tips

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

WIRING DIAGRAM

A01G4W1E11

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the engine 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

      		 The front passenger seat is occupied
      OK
      ON or OFF appears on the GTS screen according to the front passenger seat belt condition.

    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD)) Click here

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

  2. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD))


    1. Disconnect the H14 combination meter assembly connector.

    2. Disconnect the W7*1 or X20*2 occupant detection sensor (separate type front seat cushion pad) 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
      H14-10 (PBKL) - W7-3 Always Below 1 Ω
      H14-10 (PBKL) - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      H14-10 (PBKL) - X20-3 Always Below 1 Ω
      H14-10 (PBKL) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. CHECK HARNESS AND CONNECTOR (OCCUPANT DETECTION SENSOR (SEPARATE TYPE FRONT SEAT CUSHION PAD) - FRONT SEAT INNER BELT ASSEMBLY)


    1. Disconnect the W15*1 or X16*2 front seat inner belt assembly (front passenger seat) connector.


      • *1: for LHD

      • *2: for RHD

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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W7-1 - W15-3 Always Below 1 Ω
      W7-1 - Body ground Always 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      W7-1 - X16-3 Always Below 1 Ω
      W7-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

      Standard Resistance
      for LHD
      Tester Connection Condition Specified Condition
      W15-2 - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      X16-2 - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. A01G7U4E01
      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

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


    1. A01G8DCE04
      Text in Illustration
      *a

      Component without harness connected

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

      Remove the front seat inner belt assembly (front passenger seat) Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      2 - 3 Front passenger seat belt unfastened Below 1 Ω
      2 - 3 Front passenger seat belt fastened 10 kΩ or higher

    NG

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

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here