SEAT BELT WARNING SYSTEM Rear Seat Belt Warning Light Malfunction

DESCRIPTION

When a rear door is opened and closed (the rear door courtesy light switch turns on and off) with the ignition switch ON, or when a rear door is opened and closed (the rear door courtesy light switch turns on and off) and then the ignition switch is turned to ON, the rear seat belt warning light in the combination meter (multi-information display) turns on to inform the driver of the rear seat belt condition. If a rear seat belt is fastened or unfastened, the warning light changes to indicate the current rear seat belt condition.

WIRING DIAGRAM

A003BOBE01

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Clear the DTCs.

    2. Check for DTCs.

      Result
      Result Proceed to
      DTC is not output A
      CAN communication system DTC is output B

    B

    GO TO CAN COMMUNICATION SYSTEM Click here

    A

  2. READ VALUE USING INTELLIGENT TESTER (REAR DOOR COURTESY LIGHT SWITCH)


    1. Check the Data List for proper functioning of the rear door courtesy light switch Click here.

      Main Body
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      RL Door Courtesy SW Rear door LH courtesy light switch signal / ON or OFF

      ON: Rear door LH open

      OFF: Rear door LH closed

      		 -
      RR Door Courtesy SW Rear door RH courtesy light switch signal / ON or OFF

      ON: Rear door RH open

      OFF: Rear door RH closed

      		 -
      OK
      The display is as specified in the normal condition column.

    NG

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY Click here

    OK

  3. READ VALUE USING INTELLIGENT TESTER (REAR SEAT BELT BUCKLE SWITCH)


    1. Check the Data List for proper functioning of the rear seat belt buckle switch Click here.

      Combination Meter
      Tester Display Measurement Item/Range Normal Condition Diagnostic Note
      2nd-Row Seatbelt Buckle (R) Rear seat belt buckle RH signal / ON or OFF

      ON: Rear seat belt RH fastened

      OFF: Rear seat belt RH unfastened

      		 -
      2nd-Row Seatbelt Buckle (L) Rear seat belt buckle LH signal / ON or OFF

      ON: Rear seat belt LH fastened

      OFF: Rear seat belt LH unfastened

      		 -
      2nd-Row Seatbelt Buckle (C) Rear seat center belt buckle signal / ON or OFF

      ON: Rear seat center belt fastened

      OFF: Rear seat center belt unfastened

      		 -
      OK
      The display is as specified in the normal condition column.

    NG

    INSPECT REAR SEAT INNER BELT ASSEMBLY Click here

    OK

    USE SIMULATION METHOD TO CHECK Click here

  4. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY


    1. A003CRVE01
      Text in Illustration
      *1

      Component without harness connected

      (Rear Door Courtesy Light Switch)

      Remove the rear door courtesy light switch Click here.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      1 - Body ground Switch not pushed Below 1 Ω
      Switch pushed 10 kΩ or higher

    NG

    REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH - MAIN BODY ECU)


    1. for LH:


      1. A003AZLE01
        Text in Illustration
        *1

        Front view of wire harness connector

        (to Rear Door Courtesy Light Switch)
        *2

        Front view of wire harness connector

        (to Main Body ECU)
        *3 for LH
        *4 for RH

        Disconnect the G3 switch connector.

      2. Disconnect the D79 ECU connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        G3-1 - D79-8 (LCTY) Always Below 1 Ω

    2. for RH:


      1. Disconnect the H3 switch connector.

      2. Disconnect the DE ECU connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        H3-1 - DE-19 (RCTY) Always Below 1 Ω

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

  6. INSPECT REAR SEAT INNER BELT ASSEMBLY


    1. A003B5FE01
      Text in Illustration
      *1

      Component without harness connected

      (Rear Seat Inner Belt)
      *2 for LH
      *3 for RH
      *4 for Center

      Remove the rear seat inner belt Click here.

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      1 (LBR+) - 2 (LBR-) Rear seat belt LH fastened 10 kΩ or higher
      Rear seat belt LH unfastened Below 1 Ω
      for Center
      Tester Connection Condition Specified Condition
      1 (CBR+) - 2 (CBR-) Rear seat center belt fastened 10 kΩ or higher
      Rear seat center belt unfastened Below 1 Ω
      for RH
      Tester Connection Condition Specified Condition
      1 (RBR+) - 2 (RBR-) Rear seat belt RH fastened 10 kΩ or higher
      Rear seat belt RH unfastened Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for LH) B
      NG (for Center) B
      NG (for RH) C

    B

    REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH Click here

    C

    REPLACE REAR SEAT INNER BELT ASSEMBLY RH Click here

    A

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


    1. A003CV4E01
      Text in Illustration
      *1 for LH
      *2 for Center
      *3 for RH
      *4

      Front view of wire harness connector

      (to Rear Seat Inner Belt)
      *5

      Front view of wire harness connector

      (to Combination Meter)

      Disconnect the G12*1, G13*2 or G14*3 rear seat inner belt connector.


      • *1: for LH

      • *2: for Center

      • *3: for RH

    2. Disconnect the D66 meter connector.

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      G12-1 (LBR+) - D66-13 (MSD) Always Below 1 Ω
      G12-2 (LBR-) - Body ground
      G12-1 (LBR+) - Body ground Always 10 kΩ or higher
      for Center
      Tester Connection Condition Specified Condition
      G13-1 (CBR+) - D66-14 (MSTI) Always Below 1 Ω
      G13-2 (CBR-) - Body ground
      G13-1 (CBR+) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      G14-1 (RBR+) - D66-15 (MSFM) Always Below 1 Ω
      G14-2 (RBR-) - Body ground
      G14-1 (RBR+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here