Horn Button Assy Replacement
Horn Button Assy:
REPLACEMENT
1. PRECAUTION
Refer to Air Bag Systems; Service Precautions.
2. DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL
Wait for 90 seconds after disconnecting the cable to prevent the airbag working.
3. REMOVE STEERING WHEEL COVER LOWER NO.3
a. Using a screwdriver, remove the steering wheel cover lower No.3.
HINT: Tape up the screwdriver tip before use.
4. REMOVE STEERING WHEEL COVER LOWER NO.2
a. Using a screwdriver, remove the steering wheel cover lower No.2.
HINT: Tape up the screwdriver tip before use.
5. REMOVE HORN BUTTON ASSEMBLY
a. Using a Torx(R) socket wrench (T30), loosen the 2 Torx(R) screws until the groove along the screw circumference catches on the screw case.
b. Pull out the horn button assembly from the steering wheel assembly and support the horn button assembly with one hand as shown in the illustration.
NOTE: When removing the horn button assembly, do not pull the airbag wire harness.
c. Disconnect the horn connector.
d. Disconnect the 2 connectors from the horn button assembly.
NOTE: When handling the airbag connector, take care not to damage the airbag wire harness.
e. Remove the horn button assembly.
6. INSTALL HORN BUTTON ASSEMBLY
a. Support the horn button assembly with one hand as shown in the illustration.
b. Connect the 2 connectors to the horn button assembly.
NOTE: When handling the airbag connector, take care not to damage the airbag wire harness.
c. Connect the horn connector.
d. Confirm that the circumference groove of the Torx(R) screw fits in the screw case, and place the horn button assembly onto the steering wheel assembly.
e. Using a Torx(R) socket wrench (T30), tighten the 2 Torx(R) screws.
Torque: 8.8 N.m (90 kgf.cm, 78 in.lbf)
7. INSTALL STEERING WHEEL COVER LOWER NO.2
8. INSTALL STEERING WHEEL COVER LOWER NO.3
9. CONNECT CABLE TO NEGATIVE BATTERY TERMINAL
10. INSPECT HORN BUTTON ASSEMBLY
a. With the horn button assembly installed on the vehicle, perform a visual check. If there are any defects as mentioned below, replace the horn button assembly with a new one:
Cuts, minute cracks or marked discoloration on the horn button assembly top surface or in the grooved portion.
b. Make sure that the horn sounds.
HINT: If the horn does not sound, inspect the horn system.
11. PERFORM INITIALIZATION
NOTE: When disconnecting the negative (-) battery terminal, initialize the following system(s) after the terminal is reconnected.
Initialize Front Power Seat Control System
a. The power seat ECU must be initialized under any of the following conditions.
- The battery is disconnected.
- The D/C CUT fuse is replaced.
- The power seat switch (power seat ECU) is replaced.
- The power seat assembly is removed from the vehicle.
b. Initialize the power seat ECU as follows.
1. Using the seat switches, fully slide the seat forward, fully recline the seatback forward, and fully raise the seat cushion and headrest.
2. Using the seat switches, fully slide the seat rearward, fully recline the seatback rearward, and fully lower the seat cushion and headrest.
12. INSPECT SRS WARNING LIGHT