Diagnosis Procedure (Crew Cab)

Regarding Wiring Diagram information, refer to [MID AUDIO SYSTEM: WIRING DIAGRAM [CREW CAB] ].

Step	Action	YES	NO
1	SPEAKER HARNESS CHECK  Disconnect audio unit connector M88 and suspect speaker connector. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 2. Check continuity between audio unit harness connector M88 (A) and suspect speaker harness connector (B). Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 3. Check continuity between audio unit harness connector M88 (A) and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Are continuity test results as specified?	GO TO 2	Check connector housings for disconnected or loose terminals. Repair or replace harness or connector.
2	SPEAKER SIGNAL CHECK  Connect audio unit connector and audio amp. connector. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 2. Turn ignition switch ACC. 3. Push "POWER" switch. 4. Check the signal between audio unit harness connector M88 terminals with SDT or oscilloscope. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Are the audio signal voltage readings as specified?	Replace suspect speaker. Refer to [FRONT TWEETER: REMOVAL AND INSTALLATION ].	Replace audio unit. Refer to [AUDIO UNIT: REMOVAL AND INSTALLATION ].