Power Supply and Ground Circuit Check [Audio Unit (King Cab)]

Regarding Wiring Diagram information, refer to [AUDIO UNIT: WIRING DIAGRAM [PREMIUM AUDIO (KING CAB)] ].

DIAGNOSIS PROCEDURE

Step	Action	YES	NO
1	CHECK FUSES  Check that the following fuses of the audio unit are not are not blown. Are the fuses OK?	GO TO 2	If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse [SERVICE INFORMATION FOR ELECTRICAL INCIDENT: CIRCUIT INSPECTION ].
2	POWER SUPPLY CIRCUIT CHECK  Disconnect audio unit connector M64. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 2. Check voltage between the audio unit connector M64 and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Are the voltage results as specified?	GO TO 3	Check connector housing for disconnected or loose terminals. Repair harness or connector.
3	GROUND CIRCUIT CHECK  Inspect audio unit case ground. Does case ground pass inspection?	Inspection End.	Repair audio unit case ground.