SEAT BELT WARNING SYSTEM Rear Seat Belt Warning Light Malfunction

DESCRIPTION

The combination meter assembly detects whether either rear door is open or closed based on the condition of the left and right courtesy light switches. The combination meter assembly detects the rear seat belt state. The rear seat belt warning lights on the clock assembly illuminate or turn off in accordance with the rear door state, vehicle speed and rear seat belt state.

WIRING DIAGRAM

A001TIUE01

CAUTION / NOTICE / HINT

Note


  • The seat belt warning system uses the CAN communication system. First, confirm that there is no malfunction in the CAN communication system. Refer to the How to Proceed with Troubleshooting procedure.

    Click here

  • When replacing the combination meter assembly, always replace it with a new one. If a combination meter assembly which was installed to another vehicle is used, the information stored in it will not match the information from the vehicle and a DTC may be stored.

PROCEDURE


  1. READ VALUE USING GTS (REAR DOOR COURTESY LIGHT SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    3. Turn the GTS on.

    4. Enter the following menus: Body Electrical / Main Body / Data List.

    5. Read the Data List according to the display on the GTS.


      Body Electrical > Main Body > Data List
      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      RR Door Courtesy SW Rear door courtesy light switch RH ON or OFF

      ON: Rear door RH open

      OFF: Rear door RH closed

      		 -
      RL Door Courtesy SW Rear door courtesy light switch LH ON or OFF

      ON: Rear door LH open

      OFF: Rear door LH closed

      		 -

      Body Electrical > Main Body > Data List
      Tester Display
      RR Door Courtesy SW
      RL Door Courtesy SW
      OK
      ON or OFF appears on the GTS screen according to the rear door condition.
      Result
      Proceed to
      OK
      NG

    NG

    GO TO LIGHTING SYSTEM Click here

    OK

  2. READ VALUE USING GTS


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON.

    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.


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

      ON: Rear RH seat belt not fastened

      OFF: Rear RH seat belt fastened

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

      ON: Rear LH seat belt not fastened

      OFF: Rear LH seat belt fastened

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

      ON: Rear center seat belt not fastened

      OFF: Rear center seat belt fastened

      		 -

      Body Electrical > Combination Meter > Data List
      Tester Display
      2nd-Row Seatbelt Buckle (R)
      2nd-Row Seatbelt Buckle (L)
      2nd-Row Seatbelt Buckle (C)
      OK
      The GTS display changes correctly in response to the rear door condition.
      Result
      Result Proceed to
      ON or OFF is displayed on the GTS screen according to the rear seat belt condition A
      ON or OFF is not displayed normally on the GTS screen according to the rear LH seat belt condition B
      ON or OFF is not displayed normally on the GTS screen according to the rear center seat belt condition B
      ON or OFF is not displayed normally on the GTS screen according to the rear RH seat belt condition C

    B

    INSPECT REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH Click here

    C

    INSPECT REAR SEAT INNER BELT ASSEMBLY RH Click here

    A

  3. CHECK HARNESS AND CONNECTOR (CLOCK ASSEMBLY - BATTERY)


    1. A001Y7EC01
      *a

      Front view of wire harness connector

      (to Clock Assembly)

      Disconnect the clock assembly connector.

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F81-1 (IG+) - Body ground Ignition switch ON 11 to 14 V
      Ignition switch off Below 1 V
      Result
      Proceed to
      OK
      NG

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  4. INSPECT CLOCK ASSEMBLY


    1. Remove the clock assembly.

      Click here

    2. Inspect the clock assembly.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE CLOCK ASSEMBLY Click here

    OK

  5. CHECK HARNESS AND CONNECTOR (CLOCK ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Disconnect the F81 clock assembly connector.

    2. Disconnect the F4 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F81-12 (RLID) - F4-1 (RLMT) Always Below 1 Ω
      F81-13 (RCID) - F4-2 (RCMT) Always Below 1 Ω
      F81-14 (RRID) - F4-3 (RRMT) Always Below 1 Ω
      F81-12 (RLID) or F4-1 (RLMT) - Body ground Always 10 kΩ or higher
      F81-13 (RCID) or F4-2 (RCMT) - Body ground Always 10 kΩ or higher
      F81-14 (RRID) or F4-3 (RRMT) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  6. INSPECT REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH


    1. Remove the rear seat inner with center belt assembly LH.

      Click here

    2. Inspect the rear seat inner with center belt assembly LH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH Click here

    OK

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


    1. Disconnect the M32 and M33 rear seat inner with center belt assembly LH connectors.

    2. Disconnect the F4 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M32-4 (LBR+) - F4-24 (MSD) Always Below 1 Ω
      M33-1 (CBR+) - F4-25 (MSTI) Always Below 1 Ω
      M32-5 (LBR-) - Body ground Always Below 1 Ω
      M33-2 (CBR-) - Body ground Always Below 1 Ω
      M32-4 (LBR+) or F4-24 (MSD) - Body ground Always 10 kΩ or higher
      M33-1 (CBR+) or F4-25 (MSTI) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT REAR SEAT INNER BELT ASSEMBLY RH


    1. Remove the rear seat inner belt assembly RH.

      Click here

    2. Inspect the rear seat inner belt assembly RH.

      Click here

      Result
      Proceed to
      OK
      NG

    NG

    REPLACE REAR SEAT INNER BELT ASSEMBLY RH Click here

    OK

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


    1. Disconnect the M31 rear seat inner belt assembly RH connector.

    2. Disconnect the F4 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      M31-5 (RBR+) - F4-26 (MSFM) Always Below 1 Ω
      M31-4 (RBR-) - Body ground Always Below 1 Ω
      M31-5 (RBR+) or F4-26 (MSFM) - Body ground Always 10 kΩ or higher
      Result
      Proceed to
      OK
      NG

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR