Important: The following steps must be completed before using the symptom tables.
- Perform
Diagnostic System Check - Horns
before using the Symptom Tables in order to verify that all of the following
are true:
| • | The control module(s) 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 is 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
in Wiring Systems.
Symptom List
Refer to a symptom diagnostic procedure from the following list in order
to diagnose the symptom:
