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AV-40 < COMPONENT DIAGNOSIS > [BASE AUDIO WITHOUT NAVIGATION] POWER SUPPLY AND GROUND CIRCUIT 2. CHECK POWER SUPPLY CIRCUIT (CONTINUITY) 1. Turn ignition switch OFF. 2. Disconnect the harness connector between display unit and AV control unit. 3. Check continuity between display unit harness connector M71 and AV control unit harness connector 4. Check continuity between display unit harness connector M71 and ground. Is inspection result OK? YES >> GO TO 3. NO >> Repair harness or connector. 3. CHECK POWER SUPPLY CIRCUIT (AV CONTROL UNIT SIDE) 1. Connect the AV control unit harness connector. 2. Turn ignition switch ACC. 3. Check voltage between AV control unit harness connector and ground. Is inspection result OK? YES >> INSPECTION END NO >> Replacement of AV control unit. 4. CHECK GROUND CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect Display unit connector. 3. Check continuity between Display unit harness connectors and ground. Is inspection result OK? YES >> INSPECTION END NO >> Repair harness or connector. MULTIFUNCTION SWITCH MULTIFUNCTION SWITCH : Diagnosis Procedure INFOID:0000000000964551 1. CHECK FUSE Check for blown fuses. Is inspection result OK? YES >> GO TO 2. NO >> Be sure to eliminate cause of malfunction before installing new fuse. Signal name Display unit (M71) AV control unit (M83) Continuity Inverter VCC 2 59 Continuity should exist. Signal VCC 3 47 Continuity should exist. Signal name Display unit (M71) — Continuity Inverter VCC 2 Ground Continuity should not exist. Signal VCC 3 Ground Continuity should not exist. Signal name Connector No. Terminal No. Ignition switch position Value (Approx.) Inverter VCC M83 59 ACC 9 V Signal VCC 47 Signal name Connector No. Terminal No. Ignition switch position Continuity Ground M71 1 OFF Continuity should exist. Power source Fuse No. Ignition switch ACC or ON 19 |