19. Distortion on FM Only

DIAGNOSIS

STEP 1. Does the distortion persist when the radio is turned to another station?
If yes, go to Step 2.
If no, the signal from that station is too weak.

STEP 2. Does distortion increase or decrease when the vehicle is moved?
If yes, the cause may be multipath noise.
If no, repair or replace the radio. Check that a distortion is resolved.