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 (IG), or when the ignition switch is turned from off to ON (IG), the rear seat belt warning light in the telltale light assembly 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

A004GHOE03
A004ERSE01

Note

Since the seat belt warning system has functions that use CAN communication, first confirm that there is no malfunction in the communication system by inspecting the CAN communication functions in accordance with How to Proceed with Troubleshooting. Then conduct the following troubleshooting procedure.

CAUTION / NOTICE / HINT

Note

Inspect the fuses for circuits related to this system before performing the following inspection procedure.

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 (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

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

      OFF: Rear door LH and RH closed

      ON: Rear door LH or RH opened

      		 -
      RL Door Courtesy SW Rear door courtesy light switch LH and RH signal / OFF or ON

      OFF: Rear door LH and RH closed

      ON: Rear door LH or RH opened

      		 -
      OK
      Normal conditions listed above are displayed.

    NG

    GO TO DOOR COURTESY SWITCH CIRCUIT Click here

    OK

  2. READ VALUE USING GTS (REAR SEAT BELT BUCKLE SWITCH)


    1. Connect the GTS to the DLC3.

    2. Turn the ignition switch to ON (IG).

    3. Turn the GTS on.

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

    5. According to the display on the GTS, read the Data List.

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

      OFF: Rear seat belt RH unfastened

      ON: Rear seat belt RH fastened

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

      OFF: Rear seat belt LH unfastened

      ON: Rear seat belt LH fastened

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

      OFF: Rear seat center belt unfastened

      ON: Rear seat center belt fastened

      		 -
      OK
      Normal conditions listed above are displayed.

    NG

    INSPECT REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH Click here

    OK

  3. INSPECT TELLTALE LIGHT ASSEMBLY


    1. Remove the telltale light assembly Click here.

    2. Inspect the telltale light assembly Click here.


    NG

    REPLACE TELLTALE LIGHT ASSEMBLY Click here

    OK

  4. CHECK HARNESS AND CONNECTOR (TELLTALE LIGHT ASSEMBLY - COMBINATION METER ASSEMBLY)


    1. Disconnect the F1 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      F1-1 (RLMT) - F18-11 (RLID) Always Below 1 Ω
      F1-2 (RCMT) - F18-9 (RCID) Always Below 1 Ω
      F1-3 (RRMT) - F18-10 (RRID) Always Below 1 Ω
      F18-5 (E) - Body ground Always Below 1 Ω
      F18-11 (RLID) - Body ground Always 10 kΩ or higher
      F18-9 (RCID) - Body ground Always 10 kΩ or higher
      F18-10 (RRID) - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

  5. CHECK TELLTALE LIGHT ASSEMBLY (REAR SEAT BELT WARNING LIGHT SOURCE VOLTAGE)

    A004G0EE01
    Text in Illustration
    *a

    Front view of wire harness connector

    (to Telltale Light Assembly)

    1. Connect the combination meter assembly connector to the combination meter assembly.

    2. Connect the negative (-) terminal cable to the auxiliary battery, and wait for at least 2 seconds.

    3. Turn the ignition switch to ON (IG).

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

      Standard Voltage
      Tester Connection Switch Condition Specified Condition
      F18-8 (LAPB) - Body ground Ignition switch ON (IG) 11 to 14 V

    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.


    NG

    REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH Click here

    OK

  7. 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.


    NG

    REPLACE REAR SEAT INNER BELT ASSEMBLY RH Click here

    OK

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


    1. Disconnect the K13 rear seat inner with center belt assembly LH connector.

    2. Disconnect the F1 combination meter assembly connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K13-3 - F1-24 (RLSB) Always Below 1 Ω
      K13-4 - Body ground Always Below 1 Ω
      K13-3 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K13-1 - F1-25 (RCSB) Always Below 1 Ω
      K13-2 - Body ground Always Below 1 Ω
      K13-1 - Body ground Always 10 kΩ or higher

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR

    OK

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


    1. Disconnect the K14 rear seat inner belt assembly RH connector.

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

      Standard Resistance
      Tester Connection Condition Specified Condition
      K14-1 - F1-26 (RRSB) Always Below 1 Ω
      K14-2 - Body ground Always Below 1 Ω
      K14-1 - Body ground Always 10 kΩ or higher

    OK

    REPLACE COMBINATION METER ASSEMBLY Click here

    NG

    REPAIR OR REPLACE HARNESS OR CONNECTOR