Power Supply and Ground Circuit Check [Microphone]

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

Step	Action	YES	NO
1	CHECK POWER SUPPLY CIRCUIT (MICROPHONE SIDE)  Turn ignition switch ON. Check voltage between microphone harness connector R8 terminal 4 and ground. Is approximately 5V present?	GO TO 3	GO TO 2
2	CHECK POWER SUPPLY CIRCUIT (CONTINUITY)  Turn ignition switch OFF. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 2. Disconnect microphone and Bluetooth control unit harness connectors. 3. Check continuity between microphone harness connector R8 (A) terminal 4 and Bluetooth control unit harness connector B141 (B) terminal 29. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 4. Check continuity between microphone harness connector R8 (A) terminal 4 and ground. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Are the continuity test results as specified?	Replace the Bluetooth control unit. Refer to [BLUETOOTH CONTROL UNIT: REMOVAL AND INSTALLATION ].	Repair harness or connector.
3	CHECK GROUND CIRCUIT  Turn ignition switch OFF. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. 2. Disconnect microphone harness connector R8 and Bluetooth control unit harness connector B141. 3. Check continuity between microphone harness connector R8 (A) terminal 2 and Bluetooth control unit harness connector B141 (B) terminal 8. Courtesy of SUZUKI OF AMERICA CORP.SUZUKI OF AMERICA CORP. Does continuity exist?	Inspection End.	Repair harness or connector.