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Home >> Toyota >> 2024 >> Prius XLE >> Repair and Diagnosis >> Restraints >> Seat Belts >> Seat Belt Warning System (W/O OCS) - Diagnostics & Symptom Tests >> SEAT BELT WARNING SYSTEM (w/o Occupant Classification System) >> Rear Seat Belt Warning Light Malfunction [12/2022 - ] >> Procedure

Rear Seat Belt Warning Light Malfunction [12/2022 - ]: Procedure

  1. READ VALUE USING GTS 
    1. 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 Switch Status Rear door courtesy light switch (RH) signal Close or Open Close: Rear door RH closed
      Open: Rear door RH open      		 -
      RL Door Courtesy Switch Status Rear door courtesy light switch (LH) signal Close or Open Close: Rear door LH closed
      Open: Rear door LH open      		 -

      Body Electrical > Main Body > Data List 

      Tester Display
      RR Door Courtesy Switch Status
      RL Door Courtesy Switch Status

      OK

      The GTS display changes correctly in response to the rear door courtesy light switch condition.

      Result

      Proceed to
      OK
      NG

    Result: 

    NG 

    GO TO LIGHTING SYSTEM (Proceed to Rear Door Courtesy Switch Circuit). Refer to  Rear Door Courtesy Switch Circuit [12/2022 - ] 

    Result: 

    OK 

    See step  2

  2. READ VALUE USING GTS 
    1. Read the Data List according to the display on the GTS.

      Body Electrical > Power Distribution Box > Data List 

      Tester Display Measurement Item Range Normal Condition Diagnostic Note
      Rear Seat RH Buckle Switch Status Rear RH seat belt buckle switch Set, Unset or Unknown Set: Rear RH seat belt buckle switch fastened
      Unset: Rear RH seat belt buckle switch unfastened
      Unknown: Data is not determined      		 -
      Rear Seat Center Buckle Switch Status Rear center seat belt buckle switch Set, Unset or Unknown Set: Rear center seat belt buckle switch fastened
      Unset: Rear center seat belt buckle switch unfastened
      Unknown: Data is not determined      		 -
      Rear Seat LH Buckle Switch Status Rear LH seat belt buckle switch Set, Unset or Unknown Set: Rear LH seat belt buckle switch fastened
      Unset: Rear LH seat belt buckle switch unfastened
      Unknown: Data is not determined      		 -

      Body Electrical > Power Distribution Box > Data List 

      Tester Display
      Rear Seat RH Buckle Switch Status
      Rear Seat Center Buckle Switch Status
      Rear Seat LH Buckle Switch Status

      OK

      The GTS display changes correctly in response to the rear seat belt buckle switch condition.

      Result

      Result Proceed to
      OK A
      NG (Unknown displayed) B
      NG (Rear RH seat belt malfunction) C
      NG (Rear center seat belt malfunction) D
      NG (Rear LH seat belt malfunction) E

    Result: 

    A 

    REPLACE COMBINATION METER ASSEMBLY. Refer to  REMOVAL [12/2022 - ] 

    Result: 

    B 

    REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

    Result: 

    D 

    See step  5

    Result: 

    E 

    See step  7

    Result: 

    C 

    See step  3

  3. INSPECT REAR SEAT INNER BELT ASSEMBLY RH 

    Refer to INSPECTION [12/2022 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR SEAT INNER BELT ASSEMBLY RH. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

    Result: 

    OK 

    See step  4

  4. CHECK HARNESS AND CONNECTOR (REAR SEAT INNER BELT ASSEMBLY RH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND) 
    1. Disconnect the R17 power distribution box assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R54-5 (RBR+) - R17-8 Always Below 1 Ω
      R54-5 (RBR+) or R17-8 - Body ground Always 10 kΩ or higher
      R54-4 (RBR-) - Body ground Always Below 1 Ω

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  5. INSPECT REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH 

    Refer to INSPECTION [12/2022 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

    Result: 

    OK 

    See step  6

  6. CHECK HARNESS AND CONNECTOR (REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND) 
    1. Disconnect the R17 power distribution box assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R55-1 (CBR+) - R17-4 Always Below 1 Ω
      R55-2 (CBR-) - Body ground Always Below 1 Ω
      R55-1 (CBR+) or R17-4 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

  7. INSPECT REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH 

    Refer to INSPECTION [12/2022 - ]

    Result

    Proceed to
    OK
    NG

    Result: 

    NG 

    REPLACE REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

    Result: 

    OK 

    See step  8

  8. CHECK HARNESS AND CONNECTOR (REAR SEAT INNER WITH CENTER BELT ASSEMBLY LH - POWER DISTRIBUTION BOX ASSEMBLY AND BODY GROUND) 
    1. Disconnect the R17 power distribution box assembly connector.
    2. Measure the resistance according to the value(s) in the table below.

      Standard Resistance

      Tester Connection Condition Specified Condition
      R53-5 (LBR+) - R17-19 Always Below 1 Ω
      R53-4 (LBR-) - Body ground Always Below 1 Ω
      R53-5 (LBR+) or R17-19 - Body ground Always 10 kΩ or higher

      Result

      Proceed to
      OK
      NG

    Result: 

    OK 

    REPLACE POWER DISTRIBUTION BOX ASSEMBLY. Refer to  REMOVAL [12/2022 - 03/2023]  , or refer to  REMOVAL [03/2023 - ] 

    Result: 

    NG 

    REPAIR OR REPLACE HARNESS OR CONNECTOR 

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