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

DESCRIPTION

The separate type front seat cushion pad (occupant detection sensor) detects if the front passenger seat is occupied and sends signals to the combination meter assembly. The front seat inner belt assembly detects the front passenger seat belt condition and sends signals to the combination meter assembly. After receiving the signals from the separate type front seat cushion pad (occupant detection sensor) and front passenger seat inner belt assembly, the seat belt warning light in 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

A01FVCLE01

INSPECTION PROCEDURE

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.

      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 unfastened

      		 -
      Passenger Occupant Detection Switch Status of the passenger occupant detection switch / ON or OFF

      ON: Front passenger seat occupied

      OFF: Front passenger seat unoccupied

      		 -
      OK
      ON or OFF appears on the GTS screen according to the front passenger seat belt condition (fastened or unfastened) and front passenger seat condition (occupied or unoccupied).
      Result
      Result Proceed to
      OK A
      NG (P-Seatbelt Buckle SW) B
      NG (Passenger Occupant Detection Switch) C

    B

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

    C

    CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - OCCUPANT DETECTION SENSOR AND BODY GROUND) Click here

    A

    REPLACE COMBINATION METER ASSEMBLY Click here

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


    1. Disconnect the N40 combination meter assembly connector.

    2. Disconnect the c1*1 or d1*2 front seat inner belt assembly 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
      N40-10 (PBKL) - c1-1 (+) Always Below 1 Ω
      N40-10 (PBKL) - Body ground Always 10 kΩ or higher
      c1-4 (E) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      N40-10 (PBKL) - d1-1 (+) Always Below 1 Ω
      N40-10 (PBKL) - Body ground Always 10 kΩ or higher
      d1-4 (E) - Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  3. INSPECT FRONT SEAT INNER BELT ASSEMBLY (FRONT PASSENGER SIDE)


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

    2. Inspect the front seat inner belt assembly (front passenger side) Click here.


    NG

    REPLACE FRONT SEAT INNER BELT ASSEMBLY Click here

    OK

    END (REPLACE COMBINATION METER ASSEMBLY)

  4. CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - OCCUPANT DETECTION SENSOR AND BODY GROUND)


    1. Disconnect the N40 combination meter assembly connector.

    2. Disconnect the c20*1 or d20*2 occupant detection sensor 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
      N40-11 (PODS) - c20-3 (+) Always Below 1 Ω
      N40-11 (PODS) - Body ground Always 10 kΩ or higher
      c20-1 (E) - Body ground Always Below 1 Ω
      for RHD
      Tester Connection Condition Specified Condition
      N40-11 (PODS) - d20-3 (+) Always Below 1 Ω
      N40-11 (PODS) - Body ground Always 10 kΩ or higher
      d20-1 (E)- Body ground Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. INSPECT OCCUPANT DETECTION SENSOR


    1. A01FRYOE05

      Remove the separate type front seat cushion pad.


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      3 (+) - 1 (E) Front passenger seat occupied Below 100 Ω
      3 (+) - 1 (E) Front passenger seat not occupied 1 MΩ or higher
      Result
      Result Proceed to
      OK A
      NG (for Standard Seat type) B
      NG (for Sports Seat type) C
      NG (for Luxury Seat type) D

    B

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

    C

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

    D

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

    A

    REPLACE COMBINATION METER ASSEMBLY Click here