Toyota Tacoma manuals

Toyota Corolla Repair Manual: Onvehicle inspection

1. Horn button assy (vehicles not involved in collision)

  1. Check the diagnostic system .
  2. visually check the following item with the horn button assy (with airbag) installed in the vehicle.

    Check cuts, minute cracks or marked discoloration on the horn button assy top surface and in the grooved portion.

2. Horn button assy(vehicle involved in collision and airbag is not deployed)

  1. Check the diagnostic system .
  2.  visually check the following items with the horn button assy (with airbag) removed from the vehicle.

Hint

: if the horn button contact plate of the steering wheel assy is deformed, never repair it. Always replace the horn button assy with a new one.

Caution

: for removal and installation of the horn button assy, , and be sure to follow the correct procedure.

3. Horn button assy(vehicle involved in collision and airbag is deployed)

  1.  check the diagnostic system .
  2.  visually check the following item with the horn button assy (with airbag) removed from the vehicle.

    Check the damage on the spiral cable connector and wire harness.

Hint

: there should be no interference between the horn button assy and steering wheel, and the clearance should be uniform all the way around when the new horn button assy is installed on the steering wheel.

4. Instrument panel passenger airbag assy(vehicle not involved in collision)

  1. Check the diagnostic system .
  2.  visually check the following item with the instrument panel passenger airbag assy installed in the vehicle.

    Check cuts, minute cracks or marked discoloration on the instrument panel passenger airbag assy and instrument panel.

5. Instrument panel passenger airbag assy(vehicle involved in collision and airbag is not deployed)

  1. Check the diagnostic system .
  2.  visually check the following items with the instrument panel passenger airbag assy removed from the vehicle.

Hint

: if the instrument panel or instrument panel reinforcement is deformed or cracked, never repair it. Always replace it with a new one.

Caution:

Caution

: for removal and installation of the instrument panel passenger airbag assy, , and be sure to follow the correct procedure.

6. Instrument panel passenger airbag assy(vehicle involved in collision and airbag is deployed)

  1.  check the diagnostic system .
  2.  visually check the following items with the instrument panel passenger airbag assy removed from the vehicle.

Hint

: if the instrument panel or instrument panel reinforcement is deformed or cracked, never repair it. Always replace it with a new one.

7. Front seat airbag assy(vehicle not involved in collision)

  1. Check the diagnostic system .
  2.  visually check the following item with the front seat airbag assy installed in the vehicle.

    Check cuts, minute cracks or marked discoloration on the front seat airbag assy and the front seat assy.

8. Front seat airbag assy(vehicle involved in collision and airbag is not deployed)

  1. Check the diagnostic system .
  2.  visually check the following items with the front seat airbag assy removed from the front seat assy.

9. Airbag sensor assy center(vehicle not involved in collision)

  1.  check the diagnostic system .

10. Airbag sensor assy center(vehicle involved in collision and airbag is not deployed)

  1.  check the diagnostic system .

11. Airbag sensor assy center(vehicle involved in collision and airbag is deployed)

  1.  replace the airbag sensor assy center

12. Airbag front sensor(vehicle not involved in collision)

  1. Check the diagnostic system .

13. Airbag front sensor(vehicle involved in collision)

  1. Check the diagnostic system .
  2.  if the front fender of the car or its periphery is damaged, visually check for damage to the airbag front sensor, which includes the following items even if the airbag was not deployed:

14. Side airbag sensor assy(vehicle not involved in collision)

  1.  check the diagnostic system .

15. Side airbag sensor assy(vehicle involved in collision and airbag is not deployed)

  1.  check the diagnostic system .

16. Side airbag sensor assy(vehicle involved in collision and airbag is deployed)

  1.  replace the front seat airbag assy and side airbag sensor assy (, 722).

17. Seat position airbag sensor(vehicles not involved in collision)

  1.  check the diagnostic system .

18. Seat position airbag sensor(vehicle involved in collision)

  1.  check the diagnostic system .
  2.  visually check for damage to the seat position airbag sensor, which includes the following items even if the airbag was not deployed:

19. Wire harness and connector(vehicle not involved in collision)

  1.  check the diagnostic system .

20. Wire harness and connector(vehicle involved in collision)

  1.  check the diagnostic system .
  2.  check 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 instrument panel wire harness assembly. All the connectors in the system are standard yellow.

Precaution
Caution: the corolla is equipped with srs, which comprises a driver airbag, front passenger airbag and side airbag. Failure to carry out service operations in the correct sequence could ca ...

Horn button assy
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Other materials:

How to proceed with troubleshooting
The handheld tester can be used at step 4, 6, 8 and 9. 1 Vehicle brought to workshop 2 Customer problem analysis 3 Warning light check 4 The dtcs check (present and past dtcs) 5 The dtcs chart 6 Circuit inspection 7 Repair 8 Clear the dtcs (present and past dtcs) 9 The dtcs ...

Circuit description
The crankshaft position sensor (ne signal) consists of a magnet, iron core and pickup coil. The ne signal plate (crankshaft position sensor plate) has 34 teeth and is installed on the crankshaft. The ne signal sensor generates 34 signals for each engine revolution. This sensor monitors a p ...

Inspection procedure
1 Check p squib circuit(airbag sensor assy center instrument panel passenger airbag assy) Disconnect the negative () terminal cable from the battery, and wait at least for 90 seconds.  disconnect the connector between the airbag sensor assy center and the instrument panel pass ...

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