Audio System Symptom Diagnosis (If Equipped): Radio

NOTE: Electronic part / system with undiagnosed problem may cause electromagnetic interference.
Electromagnetic interference condition may have poor radio reception. To test for presence of electromagnetic interference in part / system, perform the following procedures.

Turn ignition switch to OFF.
Systematically disconnect the electronic part / system connector(s) one at a time.
Turn ignition switch to ON.
Check any improvement in radio reception.

AUDIO SYSTEM SYMPTOM DIAGNOSIS REFERENCE

Condition	Possible Cause	Action
Poor radio reception	Out of service area (Poor location)	-
	Antenna faulty	Replace antenna .
	Electrical part / system faulty	Repair or replace electrical part / system referring to after-mentioned NOTE .
	Wiring or grounding faulty	Repair circuit .
	Radio assembly faulty	Replace radio assembly .
Radio does not operate and speaker does not sound	Circuit fuse(s) blown	Replace fuse(s) and check for short circuit .
	Wiring or grounding faulty	Repair circuit .
	Radio assembly faulty	Replace radio assembly .
Radio does not operate, but speaker sound	Wiring or grounding faulty	Repair circuit .
Radio does not operate, but speaker sound	Radio assembly faulty	Replace radio assembly .
Radio is operative, but all speakers does not sound	Wiring or grounding faulty	Repair circuit .
Radio is operative, but all speakers does not sound	Radio assembly faulty	Replace radio assembly .
Individual speaker is noisy or inoperative	Wiring or grounding faulty	Repair circuit .
	Speaker faulty	Replace speaker .
	Radio assembly faulty	Replace radio assembly .
Sound quality is poor	Out of service area (Poor location)	-
	Speaker installed incorrectly	Install correctly .
	Wiring or grounding faulty	Repair circuit .
	Speaker faulty	Replace speaker .
	Radio assembly faulty	Replace radio assembly .