Inspection Procedure 12

Inspection Procedure 12: Constant noise.

DIAGNOSIS
Use the Symptom Chart to diagnose the possible cause(s) of the noise. Noise is often created by the following factors:
- Traveling conditions of the vehicle
- Terrain of area traveled through
- Surrounding buildings
- Signal conditions
- Time period

If there are still problems with noise, even after performing inspection procedures 4 to 11, obtain information on the factors listed above. (Refer to Trouble Symptoms Chart.) Determine whether the problem occurs on AM or FM, the station names, frequencies, etc. and contact the radio manufacturer's service center.