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AV STEERING SWITCH SIGNAL A CIRCUIT (TEL ADAPTER UNIT TO AUDIO UNIT) AV-29 < DTC/CIRCUIT DIAGNOSIS > [AUDIO WITHOUT NAVIGATION] C D E F G H I J K L M B A O P STEERING SWITCH SIGNAL A CIRCUIT (TEL ADAPTER UNIT TO AUDIO Description INFOID:0000000009949561 • Transmits the steering switch signal to TEL adapter unit. Diagnosis Procedure INFOID:0000000009949562 1. CHECK STEERING SWITCH SIGNAL A CIRCUIT (TEL ADAPTER UNIT TO AUDIO UNIT) 1. Turn ignition switch OFF. 2. Disconnect audio unit connector and TEL adapter unit connector. 3. Check continuity between audio unit harness connector and TEL adapter unit harness connector. 4. Check continuity between audio unit harness connector and ground. Is inspection result normal? YES >> GO TO 2. NO >> Repair harness or connector. 2. CHECK AUDIO UNIT VOLTAGE 1. Connect audio unit connector and TEL adapter unit connector. 2. Turn ignition switch ON. 3. Check voltage between audio unit harness connector terminals. Is inspection result normal? YES >> Replace TEL adapter unit. Refer to . NO >> Replace audio unit. Refer to . Audio unit TEL adapter unit Continuity Connector Terminal Connector Terminal M46 6 B54 17 Existed Audio unit Ground Continuity Connector Terminal M46 6 Not existed (+) ( − ) Voltage (Approx.) Audio unit Connector Terminal Connector Terminal M46 6 M46 15 3.3 V |