Horn Switch: Testing and Inspection

CAUTION: All SRS wire harnesses are covered with yellow insulation. Before you disconnect any part of an SRS wire harness, connect the short connectors. Whenever the ignition switch ON (II), or has been turned OFF for less than three minutes, be careful not to bump the SRS unit, the airbags could accidentally deploy and cause damage or injuries.

NOTE: The original radio has a coded theft protection circuit. Be sure to get the customer's code number before,

- disconnecting the battery.
- removing the No.32 (7.5 A) fuse from the under hood fuse/relay box.
- removing the radio.

After service, reconnect power to the radio and turn it on. When the word "CODE" is displayed, enter the customer's 5~digit code to restore radio operation.

1. Disconnect both the negative cable and positive cable from the banery, and wait at least three minutes.
2. Make sure the wheels are turned straight ahead.
3. Remove the access panel below the driver's airbag, then remove the short connector (RED) from the panel.
4. Disconnect the 3-P connector between the driver's 'airbag and cable reel, then connect the short connector (RED) on the airbag side of the connector.






5. Remove the glove box and access panel.





6. Disconnect the 3-P connector between the front passenger's airbag and the SRS main harness, then connect the short connector (RED) on the airbag side of the connector.
7. Remove the dashboard lower cover and knee bolster.





8. Disconnect the cable reel harness 6-P connector from the SRS main harness, then connect Test Harness C only to the cable reel harness.





9. Check for continuity between the No.3 terminal and body ground with the horn switch pressed. There should be continuity.





10. Remove the two TORX� bolts using a TORX� T30 bit, then remove the driver's airbag assembly.





11. Check for continuity between the horn switch positive terminal and the steering column shaft with the horn switch pressed.

If there is continuity.

- With cruise control: Test the set/resume switch. If the switch is OK, replace the cable reel.

- Without cruise control: Replace the cable reel.

If there is no continuity;

- Remove the steering wheel and the four screws, then remove the steering wheel cover. Replace the faulty horn switch.


12. Reinstall the steering wheel.