Diesel Data: Automotive Repair

Inspection Procedure 18

Distortion on FM Only.

DIAGNOSIS

STEP 1. Check that the distortion persist when the radio is turned to another station.

Q:
Does the distortion persist when the radio is turned to another station?

YES: Go to Step 2.

NO: The signal from that station is too weak.

STEP 2. Check that the distortion increase or decrease when the vehicle is moved.

Q: Does distortion increase or decrease when the vehicle is moved?

YES: The cause may be multipath noise.

NO: Replace the radio. Check that a distortion is resolved.