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 condition of the rear seat belts. If a rear seat belt is fastened or unfastened, the warning light changes to indicate the current condition of the rear seat belts.


WIRING DIAGRAM

A01ITBBE02

INSPECTION PROCEDURE

PROCEDURE


  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)


    1. Check if a CAN communication system DTC is output.

      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 No. 1 seat belt buckle RH signal / ON or OFF

      ON: Rear No. 1 seat belt RH fastened

      OFF: Rear No. 1 seat belt RH unfastened

      		 -
      2nd-Row Seatbelt Buckle (L) Rear No. 1 seat belt buckle LH signal / ON or OFF

      ON: Rear No. 1 seat belt LH fastened

      OFF: Rear No. 1 seat belt LH unfastened

      		 -
      2nd-Row Seatbelt Buckle (C) Rear No. 1 seat center belt buckle signal / ON or OFF

      ON: Rear No. 1 seat center belt fastened

      OFF: Rear No. 1 seat center belt unfastened

      		 -
      3rd-Row Seatbelt Buckle (R)* Rear No. 2 seat belt buckle RH signal / ON or OFF

      ON: Rear No. 2 seat belt RH fastened

      OFF: Rear No. 2 seat belt RH unfastened

      		 -
      3rd-Row Seatbelt Buckle (L)* Rear No. 2 seat belt buckle LH signal / ON or OFF

      ON: Rear No. 2 seat belt LH fastened

      OFF: Rear No. 2 seat belt LH unfastened

      		 -

      • *: w/ Rear No. 2 Seat

      OK
      The display is as specified in the normal condition column.
      Result
      Result Proceed to
      OK A
      NG (w/o Rear No. 2 Seat) B
      NG (w/ Rear No. 2 Seat) C

    B

    INSPECT REAR SEAT INNER BELT Click here

    C

    INSPECT REAR NO. 2 SEAT INNER BELT ASSEMBLY Click here

    A

    USE SIMULATION METHOD TO CHECK Click here

  4. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY


    1. A01INK6

      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. A01IRWZE04
      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

      for LH:


      1. Disconnect the N31 switch connector.

      2. Disconnect the H79 ECU connector.

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

        Standard Resistance
        Tester Connection Condition Specified Condition
        N31-1 - H79-8 (LCTY) Always Below 1 Ω

    2. for RH:


      1. Disconnect the O21 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
        O21-1 - 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


    1. A01ITXDE03
      Text in Illustration
      *1 for LH
      *2 for Center
      *3 for RH

      for LH, RH:

      Remove the rear No. 1 seat inner belt Click here.

    2. for Center:

      Remove the rear seat inner belt (for LH side) Click here.

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      1 (+) - 2 (E) Rear No. 1 seat belt LH fastened 10 kΩ or higher
      Rear No. 1 seat belt LH unfastened Below 1 Ω
      for Center
      Tester Connection Condition Specified Condition
      1 (CBR+) - 2 (CBR-) Rear No. 1 seat center belt fastened 10 kΩ or higher
      Rear No. 1 seat center belt unfastened Below 1 Ω
      for RH
      Tester Connection Condition Specified Condition
      1 (+) - 2 (E) Rear No. 1 seat belt RH fastened 10 kΩ or higher
      Rear No. 1 seat belt RH unfastened Below 1 Ω
      Result
      Result Proceed to
      OK A
      NG (for LH) B
      NG (for Center) C
      NG (for RH) D

    B

    REPLACE REAR SEAT 3 POINT TYPE INNER BELT ASSEMBLY LH Click here

    C

    REPLACE REAR SEAT INNER BELT ASSEMBLY (for LH Side) Click here

    D

    REPLACE REAR SEAT 3 POINT TYPE INNER BELT ASSEMBLY RH Click here

    A

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


    1. A01IU6JE02
      Text in Illustration
      *1 for LH
      *2 for Center
      *3 for RH
      *4

      Front view of wire harness connector

      (to Rear No. 1 Seat Inner Belt)
      *5

      Front view of wire harness connector

      (to Combination Meter)

      Disconnect the N12*1, N13*2 or O9*3 rear No. 1 seat inner belt connector.


      • *1: for LH

      • *2: for Center

      • *3: for RH

    2. Disconnect the H62 meter connector.

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      N12-1 (+) - H62-13 (MSD) Always Below 1 Ω
      N12-2 (E) - Body ground
      N12-1 (+) - Body ground Always 10 kΩ or higher
      for Center
      Tester Connection Condition Specified Condition
      N13-1 (CBR+) - H62-14 (MSTI) Always Below 1 Ω
      N13-2 (CBR-) - Body ground
      N13-1 (CBR+) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      O9-1 (+) - H62-15 (MSFM) Always Below 1 Ω
      O9-2 (E) - Body ground
      O9-1 (+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

  8. INSPECT REAR NO. 2 SEAT INNER BELT ASSEMBLY


    1. A01IQLPE03
      Text in Illustration
      *1 for LH
      *2 for RH

      Remove the rear No. 2 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
      3 (+) - 4 (E) Rear No. 2 seat belt LH fastened 10 kΩ or higher
      Rear No. 2 seat belt LH unfastened Below 1 Ω
      for RH
      Tester Connection Condition Specified Condition
      1 (+) - 2 (E) Rear No. 2 seat belt RH fastened 10 kΩ or higher
      Rear No. 2 seat belt RH unfastened Below 1 Ω

    NG

    REPLACE REAR NO. 2 SEAT INNER BELT ASSEMBLY Click here

    OK

  9. CHECK HARNESS AND CONNECTOR (REAR NO. 2 SEAT INNER BELT - COMBINATION METER AND BODY GROUND)


    1. A01INDSE02
      Text in Illustration
      *1

      Front view of wire harness connector

      (to Rear No. 2 Seat Inner Belt)
      *2

      Front view of wire harness connector

      (to Combination Meter)
      *3 for LH
      *4 for RH

      Disconnect the N24 rear No. 2 seat inner belt connector.

    2. Disconnect the H62 meter connector.

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

      Standard Resistance
      for LH
      Tester Connection Condition Specified Condition
      N24-3 (+) - H62-34 (MSM+) Always Below 1 Ω
      N24-4 (E) - Body ground
      N24-3 (+) - Body ground Always 10 kΩ or higher
      for RH
      Tester Connection Condition Specified Condition
      N24-1 (+) - H62-35 (MS+) Always Below 1 Ω
      N24-2 (E) - Body ground
      N24-1 (+) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here