Diagnostic System Check - Horns

Diagnostic System Check - Horns

Step 1 - 2:

Step 3 - 5:

Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
2. Lack of communication may be due to a partial malfunction of the class 2 serial data circuit or due to a total malfunction of the class 2 serial data circuit. The specified procedure will determine the particular condition.
3. The symptoms list in Symptoms will determine the correct diagnostic procedure to use.
4. The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed. At this point you have determined all DTCs applicable to the horn system. Refer to Symptoms - Horns for further horn system diagnosis. Any other codes displayed from the listed modules do not apply to horns and should be diagnosed in the applicable section. Symptom Related Diagnostic Procedures