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 (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 (for front passenger), the seat belt warning light in the combination meter assembly will blink or go off.

WIRING DIAGRAM

A003ZPWE01

INSPECTION PROCEDURE

PROCEDURE


  1. READ VALUE USING INTELLIGENT TESTER


    1. Connect the intelligent tester to the DLC3.

    2. Turn the power switch on (IG).

    3. Turn the intelligent tester on.

    4. Enter the following menus: Body / Combination Meter / Data List.

    5. Read the Data List according to the display on the intelligent tester.

      Combination Meter (Combination Meter Assembly)
      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 fastened

      OFF: Front passenger seat belt not fastened

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

    NG

    CHECK HARNESS AND CONNECTOR (COMBINATION METER - FRONT SEAT INNER BELT - BODY GROUND) Click here

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

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


    1. Disconnect the H19 combination meter assembly connector.

    2. Disconnect the Q20*1 or P25*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
      H19-29 (P/SB) - Q20-3 Always Below 1 Ω
      H19-29 (P/SB) - Body ground Always 10 kΩ or higher
      Q20-2 - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      H19-29 (P/SB) - P25-3 Always Below 1 Ω
      H19-29 (P/SB) - Body ground Always 10 kΩ or higher
      P25-2 - 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. A003YS5E01
      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. A003VGIE03
      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
      Q20-3 - B-1 Always Below 1 Ω
      Q20-2 - B-3 Front passenger seat belt unfastened Below 1 Ω
      Q20-2 - B-3 Front passenger seat belt fastened 10 kΩ or higher
      for RHD
      Tester Connection Condition Specified Condition
      P25-3 - B-1 Always Below 1 Ω
      P25-2 - B-3 Front passenger seat belt unfastened Below 1 Ω
      P25-2 - B-3 Front passenger seat belt fastened 10 kΩ or higher

    NG

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

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here