|
|
AV-108 < COMPONENT DIAGNOSIS > [AUDIO SYSTEM] MICROPHONE SIGNAL CIRCUIT MICROPHONE SIGNAL CIRCUIT Description INFOID:0000000005146343 Voice signals are transmitted from the microphone to the AV control unit using the microphone signal circuits. Diagnosis Procedure INFOID:0000000005146344 Regarding Wiring Diagram information, refer to . 1. CHECK HARNESS BETWEEN AV CONTROL UNIT AND MICROPHONE 1. Turn ignition switch OFF. 2. Disconnect AV control unit connector and microphone connec- tor. 3. Check continuity between AV control unit harness connector M45 (A) and microphone harness connector R109 (B). 4. Check continuity between AV control unit harness connector M45 (A) and ground. Are the continuity test results as specified? YES >> GO TO 2. NO >> Repair harness or connector. 2. CHECK MICROPHONE POWER SUPPLY 1. Connect AV control unit connector and microphone connector. 2. Turn ignition switch ON. 3. Check voltage between microphone harness connector R109 terminal 4 and ground. Is voltage reading approx. 5 volts? YES >> GO TO 3. NO >> Replace AV control unit. Refer to 3. CHECK MICROPHONE SIGNAL A B Continuity Connector Terminal Connector Terminal M45 72 R109 1 Yes 71 2 70 4 A — Continuity Connector Terminal M45 70 Ground No 71 72 AWLIA1603ZZ 4 - Ground : Approx. 5V WKIA5796E |