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On-Vehicle Inspection

WARNING: This page is about a different car, the 2005 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
CAUTION: Be sure to perform the initialization of the occupant classification ECU if any of the following conditions occur (See INITIALIZATION ). If the initialization is not performed, the SRS may not operate properly.
  • The occupant classification ECU is replaced.
  • Accessories (seatback tray, seat cover, etc.) are installed to the vehicle.
  • The passenger seat is removed from the vehicle, and then reinstalled or replaced.
  • The passenger airbag ON/OFF indicator light ("OFF(" comes on when the passenger seat is not occupied.
  • The vehicle is brought to the workshop for repair due to an accident or collision.
  1. HORN BUTTON ASSY (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. With the horn button assy installed on the vehicle, perform a visual check. If there are any defects as mentioned below, replace the horn button assy with a new one: Cuts, minute cracks or marked discoloration on the horn button assy top surface or in the grooved portion.
    Fig 1: Identifying Horn Button Assy
    G02610033Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  2. HORN BUTTON ASSY (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. With the horn button assy removed from the vehicle, perform a visual check. If there are any defects as mentioned below, replace the horn button assy or steering wheel assy with a new one:
    • Cuts, minute cracks or marked discoloration on the horn button assy top surface or in the grooved portion.
      Fig 2: Removing Horn Button Assy From Vehicle
      G02610034Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Cracks or other damage to the connectors.
    • Deformation of the steering wheel assy
    • Deformation of the horn button contact plate of the horn button assy.
      Fig 3: Identifying Horn Button Contact Plate
      G02610035Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • There should be no interference between the horn button assy and steering wheel assy, and the clearance should be uniform all the way around when the new horn button assy is installed on the steering wheel assy.
    CAUTION: For removal and installation procedures of the horn button assy, see REPLACEMENT . Be sure to follow the correct procedure.
    Fig 4: Checking Clearance Of Horn Button Assy
    G02610036Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  3. INSTR PNL PASS L/DOOR AIRBAG ASSY (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. With the instr pnl pass I/door airbag assy installed on the vehicle, perform a visual check. If there are any defects as mentioned below, replace the instrument panel with a new one:

    Cuts, minute cracks or marked discoloration on the instrument panel around the instr pnl pass I/door airbag assy.

    Fig 5: Identifying Instr PNL Pass L/Door Airbag Assy Location
    G02610037Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  4. INSTR PNL PASS L/DOOR AIRBAG ASSY (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. With the instr pnl pass I/door airbag assy removed from the vehicle, perform a visual check. If there are any defects as mentioned below, replace the instr pnl pass I/door airbag assy, instrument panel or instrument panel reinforcement with a new one:
    • Cuts, minute cracks or marked discoloration on the instr pnl pass I/door airbag assy.
    • Cracks or other damage to the wire harness or connector.
      Fig 6: Identifying Instr PNL Pass L/Door Airbag Assy
      G02610038Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    • Deformation or cracks on the instrument panel or instrument panel reinforcement.
    CAUTION: For removal and installation procedures of the instr pnl pass I/door airbag assy, see REPLACEMENT . Be sure to follow the correct procedure.
    Fig 7: Checking Wire Harness Or Connector For Cracks Or Other Damage
    G02610039Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  5. FRONT SEAT AIRBAG ASSY (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. With the front seat airbag assy installed on the vehicle, perform a visual check. If there are any defects as mentioned below, replace the front seatback assy with a new one:

    Cuts, minute cracks or marked discoloration on the front seatback assy around the front seat airbag assy.

    Fig 8: Identifying Front Seat Airbag Assy (Vehicle Not Involved In Collision)
    G02610040Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  6. FRONT SEAT AIRBAG ASSY (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. With the front seat airbag assy removed from the vehicle, perform a visual check. If there are any defects as mentioned below, replace the front seat airbag assy with a new one:
    • Cuts, minute cracks or marked discoloration on the front seat airbag assy.
    • Cracks or other damage to the wire harness or connector.
    Fig 9: Removing Front Seat Airbag Assy From Vehicle
    G02610041Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
    CAUTION: For removal and installation procedures of the front seat airbag assy, see OVERHAUL (power seat) or OVERHAUL (manual seat). Be sure to follow the correct procedure.
  7. CURTAIN SHIELD AIRBAG ASSY (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. With the curtain shield airbag assy installed on the vehicle, perform a visual check. If there are any defects as mentioned below, replace the front pillar garnish, RR window side garnish assy No. 2 or roof headlining assy with a new one:

    Cuts, minute cracks or marked discoloration on the front pillar garnish, RR window side garnish assy No. 2 or roof headlining assy around the curtain shield airbag assy.

    Fig 10: Identifying Curtain Shield Airbag Assy (Vehicle Not Involved In Collision)
    G02610042Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  8. CURTAIN SHIELD AIRBAG ASSY (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. With the curtain shield airbag assy removed from the vehicle, perform a visual check. If there are any defects as mentioned below, replace the curtain shield airbag assy with a new one:
    • Cuts, minute cracks or marked discoloration on the curtain shield airbag assy.
    • Cracks or other damage to the connectors.
    CAUTION: For removal and installation procedures of the curtain shield airbag assy, see REPLACEMENT . Be sure to follow the correct procedure.
    Fig 11: Identifying Curtain Shield Airbag Assy
    G02610043Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
  9. AIRBAG SENSOR ASSY CENTER (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
  10. AIRBAG SENSOR ASSY CENTER (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
  11. AIRBAG SENSOR ASSY CENTER (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS DEPLOYED) 
    1. Replace the airbag sensor assy center (See REPLACEMENT ).
    CAUTION: For removal and installation procedures of the airbag sensor assy center, see REPLACEMENT . Be sure to follow the correct procedure.

    HINT:

    The airbag sensor assy center should be replaced after any of the airbags has deployed, as it has been subjected to the impact.

  12. AIRBAG SENSOR FRONT (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
  13. AIRBAG SENSOR FRONT (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. When the front bumper of the vehicle or its periphery is damaged, check if there is any damage to the airbag sensor front. If any of the airbag sensor front have defects as mentioned below, replace it with a new one:
    • Cracks, dents or chips in the case.
    • Cracks or other damage to the connector.
    • Peeling off of the label or damage to the serial number.
    CAUTION: For removal and installation procedures of the airbag sensor front, see REPLACEMENT . Be sure to follow the correct procedure.
  14. AIRBAG SENSOR FRONT (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS DEPLOYED) 
    1. Replace the airbag sensor front (See REPLACEMENT ).
    CAUTION: For removal and installation procedures of the airbag sensor front, see REPLACEMENT . Be sure to follow the correct procedure.

    HINT:

    The airbag sensor front on the impacted side should be replaced after the horn button assy or instr pnl pass I/door airbag assy has deployed.

  15. SIDE AIRBAG SENSOR ASSY (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
  16. SIDE AIRBAG SENSOR ASSY (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. When the center pillar of the vehicle or its periphery is damaged, check if there is any damage to the side airbag sensor assy. If there are any defects as mentioned below, replace the side airbag sensor assy with a new one:
    • Cracks, dents or chips in the case.
    • Cracks or other damage to the connector.
    • Peeling off of the label or damage to the serial number.
    CAUTION: For removal and installation procedures of the side airbag sensor assy, see REPLACEMENT . Be sure to follow the correct procedure.
  17. SIDE AIRBAG SENSOR ASSY (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS DEPLOYED) 
    1. Replace the side airbag sensor assy (See REPLACEMENT ).
    CAUTION: For removal and installation procedures of the side airbag sensor assy, see REPLACEMENT . Be sure to follow the correct procedure.

    HINT:

    The side airbag sensor assy on the impacted side should be replaced after the front seat airbag assy and curtain shield airbag assy have deployed.

  18. AIRBAG SENSOR REAR (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
  19. AIRBAG SENSOR REAR (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. When the quarter panel of the vehicle or its periphery is damaged, check if there is any damage to the airbag sensor rear. If there are any defects as mentioned below, replace the airbag sensor rear with a new one:
    • Cracks, dents or chips in the case.
    • Cracks or other damage to the connector.
    • Peeling off of the label or damage to the serial number.
    CAUTION: For removal and installation procedures of the airbag sensor rear, see REPLACEMENT . Be sure to follow the correct procedure.
  20. AIRBAG SENSOR REAR (VEHICLE INVOLVED IN COLLISION AND AIRBAG IS DEPLOYED) 
    1. Replace the airbag sensor rear (See REPLACEMENT ).
    CAUTION: For removal and installation procedures of the airbag sensor rear, see REPLACEMENT . Be sure to follow the correct procedure.

    HINT:

    The airbag sensor rear on the impacted side should be replaced after the curtain shield airbag assy has deployed.

  21. SEAT POSITION AIRBAG SENSOR (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
  22. SEAT POSITION AIRBAG SENSOR (VEHICLE INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. Even if the airbag was not deployed, perform a visual check for damage to the seat position airbag sensor including the following:
    • Cracks, dents or chips in the case.
    • Cracks or other damage to the connector.
    CAUTION: For removal and installation procedures of the seat position airbag sensor, see REPLACEMENT . Be sure to follow the correct procedure.
  23. OCCUPANT CLASSIFICATION ECU (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
  24. OCCUPANT CLASSIFICATION ECU (VEHICLE INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. Even if the airbag was not deployed, perform a visual check for damage to the occupant classification ECU including the following:
    • Cracks, dents or chips in the case.
    • Cracks or other damage to the connectors.
    CAUTION: For removal and installation procedures of the occupant classification ECU, see REPLACEMENT . Be sure to follow the correct procedure.
  25. WIRE HARNESS AND CONNECTOR (VEHICLE NOT INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
  26. WIRE HARNESS AND CONNECTOR (VEHICLE INVOLVED IN COLLISION) 
    1. Perform a diagnostic system check (See DIAGNOSTIC TROUBLE CODES CHECK/CLEAR ).
    2. Check for breaks in all wires of the SRS wire harness and exposed conductors.
    3. Check to see if the SRS wire harness connectors are cracked or chipped.

    HINT:

    The SRS wire harness is integrated with the engine room main wire, instrument panel wire, instrument panel wire No. 2, seat wire No. 1, floor wire, floor wire No. 2 and roof wire No. 2.

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