Possible Causes

AUDIO UNIT INOPERATIVE/DOES NOT OPERATE CORRECTLY PINPOINT TEST REFERENCE

PINPOINT TEST 1		THE AUDIO UNIT IS INOPERATIVE/DOES NOT OPERATE CORRECTLY
STEP	INSPECTION		ACTION
1	CHECK THE OPERATION OF THE AUDIO UNIT Key ON. Turn the audio unit on. Is the audio unit display illuminated?	Yes	Go to next step.
1		No	Go to step 3.
2	CHECK FOR SOUND COMING FROM THE SPEAKERS Verify that sound is coming from the speakers. Is there sound coming from the speakers?	Yes	Go to next step.
2		No	See PINPOINT TEST 3: POOR QUALITY/NO SOUND FROM ONE OR MORE SPEAKERS (NOT ALL SPEAKERS)
3	CHECK CIRCUITS (LG/V) AND (B/P) FOR VOLTAGE Key OFF. Disconnect: Audio unit 0920-201. Key ON. Measure the voltage between the audio unit 0920-201 pin 9, (LG/V), harness side and ground; and between the audio unit 0920-201 pin 10, (B/P), harness side and ground. Are the voltages greater than 10 volts?	Yes	Go to next step.
3		No	Verify the smart junction box (SJB) fuse 6 (10A) or fuse 24 (20A) is OK. If OK, repair the circuit in question. Test the system for normal operation.
4	CHECK CIRCUIT (B/LG) FOR AN OPEN Key OFF. Measure the resistance between the audio unit 0920-201 pin 11, (B/LG), harness side and ground; and between the audio unit 0920-201 pin 16, (B/LG), harness side and ground. Are the resistances less than 5 ohms?	Yes	Replace the audio unit. See AUDIO UNIT . TEST the system for normal operation after the repair.
4		No	Repair the circuit in question. Test the system for normal operation.