SEAT BELT WARNING SYSTEM Rear Seat Belt Warning Light Malfunction

DTC Code DTC Name
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 telltale light assembly 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.

  • This is only for vehicles with a rear No. 1 seat or vehicles with a rear No. 1 and rear No. 2 seat.

WIRING DIAGRAM

B349039E03

PROCEDURE

  1. CHECK FOR DTC (CAN COMMUNICATION SYSTEM)

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

      Table 1. Result

      Result

      Proceed to

      DTC is not output

      A

      CAN communication system DTC is output

      B

    GO TO CAN COMMUNICATION SYSTEM

    (Click here)

  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).

      Table 2. 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.

    INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLYClick here

  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).

      Table 3. Combination Meter

      Tester Display

      Measurement Item/Range

      Normal Condition

      Diagnostic Note

      2nd-Row Seatbelt Buckle (R)*1

      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)*1

      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)*1

      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)*2

      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)*2

      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

      -

      • *1: w/ Rear No. 1 Seat

      • *2: w/ Rear No. 2 Seat

      OK

      The display is as specified in the normal condition column.

      Table 4. Result

      Result

      Proceed to

      OK

      A

      NG (w/o Rear No. 2 Seat)

      B

      NG (w/ Rear No. 2 Seat)

      C

    INSPECT REAR SEAT INNER BELTClick here

    INSPECT REAR NO. 2 SEAT INNER BELT ASSEMBLYClick here

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

    1. U122576E02

      Disconnect the H62 combination meter assembly connector.

    2. Disconnect the H122 telltale light assembly connector.

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

      Standard Resistance

      Tester Connection

      Condition

      Specified Condition

      H62-1 (RLMT) - H122-18 (RLID)*1

      Always

      Below 1 Ω

      H62-2 (RCMT) - H122-8 (RCID)*1

      H62-4 (RRMT) - H122-9 (RRID)*1

      H62-27 (RRBT) - H122-17 (RRTW)*2

      H62-9 (RLBT) - H122-16 (RLTW)*2

      H62-1 (RLMT) - Body ground*1

      Always

      10 kΩ or higher

      H62-2 (RCMT) - Body ground*1

      H62-4 (RRMT) - Body ground*1

      H62-27 (RRBT) - Body ground*2

      H62-9 (RLBT) - Body ground*2

      • *1: w/ Rear No. 1 Seat

      • *2: w/ Rear No. 2 Seat

      Table 5. Text in Illustration

      *1

      Front view of wire harness connector

      (to Combination Meter Assembly)

      *2

      Front view of wire harness connector

      (to Telltale Light Assembly)

      *3

      w/ Rear No. 1 Seat

      *4

      w/ Rear No. 2 Seat

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  5. CHECK TELLTALE LIGHT ASSEMBLY

    1. Replace the telltale light assembly with a new or normally functioning one (Click here).

    2. Check that the operation of the telltale light assembly returns to normal.

      OK

      The operation of the telltale light assembly returns to normal.

    END (TELLTALE LIGHT ASSEMBLY WAS DEFECTIVE)

    REPLACE COMBINATION METER ASSEMBLY

    (Click here)

  6. INSPECT REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY

    1. C197123

      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

    REPLACE REAR DOOR COURTESY LIGHT SWITCH ASSEMBLY

    (Click here)

  7. CHECK HARNESS AND CONNECTOR (REAR DOOR COURTESY LIGHT SWITCH - MAIN BODY ECU [INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY])

    1. U122711E01

      for LH:

      1. Disconnect the N31 rear door courtesy light switch LH connector.

      2. Disconnect the H79 main body ECU (instrument panel junction block assembly) 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 rear door courtesy light switch RH connector.

      2. Disconnect the DE main body ECU (instrument panel junction block assembly) 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
    Table 6. 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 [Instrument Panel Junction Block Assembly])

    *3

    for LH

    *4

    for RH

    REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  8. INSPECT REAR SEAT INNER BELT

    1. C205405E03

      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

      Table 7. 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
      Table 8. 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
      Table 9. 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
      Table 10. Text in Illustration

      *1

      for LH

      *2

      for Center

      *3

      for RH
      Table 11. Result

      Result

      Proceed to

      OK

      A

      NG (for LH)

      B

      NG (for Center)

      C

      NG (for RH)

      D

    REPLACE REAR SEAT 3 POINT TYPE INNER BELT ASSEMBLY LH

    (Click here)

    REPLACE REAR SEAT INNER BELT ASSEMBLY (for LH Side)

    (Click here)

    REPLACE REAR SEAT 3 POINT TYPE INNER BELT ASSEMBLY RH

    (Click here)

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

    1. U123059E01

      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 combination meter assembly connector.

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

      Standard Resistance

      Table 12. 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
      Table 13. 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
      Table 14. 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
      Table 15. 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 Assembly)

    REPLACE COMBINATION METER ASSEMBLY

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR

  10. INSPECT REAR NO. 2 SEAT INNER BELT ASSEMBLY

    1. C205407E03

      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

      Table 16. 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
      Table 17. 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
      Table 18. Text in Illustration

      *1

      for LH

      *2

      for RH

    REPLACE REAR NO. 2 SEAT INNER BELT ASSEMBLY

    (Click here)

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

    1. U123060E01

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

    2. Disconnect the H62 combination meter assembly connector.

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

      Standard Resistance

      Table 19. 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
      Table 20. 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
      Table 21. 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 Assembly)

      *3

      for LH

      *4

      for RH

    REPLACE COMBINATION METER ASSEMBLY

    (Click here)

    REPAIR OR REPLACE HARNESS OR CONNECTOR