Audio System Symptom Diagnosis

Before performing the following troubleshooting, check if the symptom is not caused by incorrect handling while referring to .

If the cause cannot be identified by the following troubleshooting, replace audio unit with a known-good one. If the symptom is cleared, audio unit is the cause.

AUDIO SYSTEM SYMPTOM CHART

Condition	Possible Cause	Action
Audio unit cannot turn ON	Faulty audio connector	Check audio connectors for connection .
Audio unit cannot turn ON	Faulty audio power supply and ground circuit (including fuse)	Refer to AUDIO SYSTEM CIRCUIT DIAGRAM and AUDIO SYSTEM INSPECTION .
Poor radio reception	Faulty radio antenna connector	Check radio antenna connectors for connection .
	Faulty radio antenna	Refer to PRINTED RADIO ANTENNA INSPECTION and XM ANTENNA INSPECTION (IF EQUIPPED) .
	Faulty radio antenna feeder cable	Refer to RADIO ANTENNA FEEDER CABLE INSPECTION .
	Faulty radio antenna power supply circuit	Refer to AUDIO SYSTEM CIRCUIT DIAGRAM and AUDIO SYSTEM INSPECTION .
No sound from speaker	Faulty speaker connector	Check speaker connectors for connection .
	Faulty speaker circuit	Refer to AUDIO SYSTEM CIRCUIT DIAGRAM and AUDIO SYSTEM INSPECTION .
	Faulty audio amplifier connector	Check audio amplifier connectors for connection .
	Faulty audio amplifier power supply and ground circuit (including fuse)	Refer to AUDIO SYSTEM CIRCUIT DIAGRAM and AUDIO SYSTEM INSPECTION .
Light mode does not change when lighting switch is turned on	Faulty illumination power supply and ground circuit (including fuse)	Refer to AUDIO SYSTEM CIRCUIT DIAGRAM and AUDIO SYSTEM INSPECTION .
Audio system is operative, but audio control switch does not control audio system	Faulty audio control switch connector	Check steering switch connectors for connection .
	Faulty audio control switch	Refer to STEERING SWITCH (AUDIO CONTROL SWITCH, DISPLAY AND TRIP SWITCH AND HANDS-FREE SWITCH) INSPECTION .
	Faulty remote audio control switch circuit	Refer to AUDIO SYSTEM CIRCUIT DIAGRAM .
Impossible to call using hands-free system (if equipped)	Faulty microphone connector	Check microphone connectors for connection .
	Faulty microphone	Refer to AUDIO SYSTEM INSPECTION .
	Faulty microphone circuit	Refer to AUDIO SYSTEM CIRCUIT DIAGRAM .
	Faulty hands-free switch connector	Check Steering switch connectors for connection .
	Faulty hands-free switch	Refer to STEERING SWITCH (AUDIO CONTROL SWITCH, DISPLAY AND TRIP SWITCH AND HANDS-FREE SWITCH) INSPECTION .
	Faulty hands-free switch circuit	Refer to AUDIO SYSTEM CIRCUIT DIAGRAM .