Horn Button Assembly

CAUTION: Be sure to perform the initialization of the occupant classification ECU under the conditions listed below.If the initialization is not performed, the SRS may not operate properly.

- The occupant classification ECU is replaced.
- Accessories (seatback tray or seat cover, etc.) are installed to the vehicle.
- The passenger seat is removed from the vehicle.
- The SRS warning light comes on.
- The vehicle is brought to the work shop for repair purpose due to the accident or collision.




VEHICLES NOT INVOLVED IN COLLISION
a. Do a diagnostic system check.
b. Do a visual check which includes the following items with the horn button assembly installed in the vehicle: Cuts, minute cracks or marked discoloration on the horn button assembly top surface and in the grooved portion.




VEHICLE INVOLVED IN COLLISION AND AIRBAG IS NOT DEPLOYED
a. Do a diagnostic system check.
b. Do a visual check which includes the following items with the horn button assembly removed from the vehicle:
- Cuts, minute cracks or marked discoloration on the horn button assembly top surface and in the grooved portion.
- Cuts and cracks in wire harness, and chipping in the connectors.
- Deformation of the steering wheel assembly.




- The deformation of the horn button contact plate of the horn button assembly.

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




- There should be no interference between the horn button assembly and steering wheel assembly, and the clearance should be uniform all the way around when the new horn button assembly is installed on the steering wheel assembly.

CAUTION: For removal and installation procedures of the horn button assembly, see "Replacement", and be sure to follow the correct procedure.