Horn Button Assy

CAUTION: Be sure to perform the initialization of the occupant classification ECU if any of the following conditions occur. 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.
- Both the SRS warning light and passenger airbag ON/OFF indicator light ("OFF") come on.
- The vehicle is brought to the workshop for repair due to an accident or collision.




VEHICLE NOT INVOLVED IN COLLISION
a. Perform a diagnostic system check.
b. With the horn button assy installed on the vehicle, perform a visual check including the following:
Cuts, minute cracks or marked discoloration on the horn button assy top surface and in the grooved portion.




VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED
a. Perform a diagnostic system check.
b. With the horn button assy removed from the vehicle, perform a visual check including the following:
- Cuts, minute cracks or marked discoloration on the horn button assy top surface and in the grooved portion.
- 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.

HINT:
- If the horn button contact plate of the horn button assy is deformed, never repair it. Always replace the horn button assy with a new one.




- 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", and be sure to follow the correct procedure.