Important: The following steps must be completed before using the symptom tables:
- Perform
Diagnostic System Check - Vehicle
before using the symptom tables in order to verify that all of the following are true:
| • | The control modules can communicate via the serial data link. |
- Review the system operation in order to familiarize yourself with the system functions. Refer to
Horns System Description and Operation
.
Visual/Physical Inspection
| • | Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom. |
| • | Perform the following if a horn buzzes or has a harsh tone: |
| - | Inspect for debris in the joint where the horn fastens to the vehicle. |
| - | Test the torque of the horn mounting hardware. The horn mounting hardware should be tightened to a torque of 10 N·m (7 lb ft). |
Intermittent
Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to
Testing for Intermittent Conditions and Poor Connections
.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom:
