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AV-138 < DTC/CIRCUIT DIAGNOSIS > [BASE AUDIO WITH COLOR DISPLAY] STEERING SWITCH SIGNAL B CIRCUIT STEERING SWITCH SIGNAL B CIRCUIT Description INFOID:0000000009721665 Transmits the steering switch signal to AV control unit. Diagnosis Procedure INFOID:0000000009721666 1. CHECK STEERING SWITCH SIGNAL B CIRCUIT 1. Turn ignition switch OFF. 2. Disconnect AV control unit connector and spiral cable connector. 3. Check continuity between AV control unit harness connector and spiral cable harness connector. 4. Check continuity between AV control unit harness connector and ground. Is the inspection result normal? YES >> GO TO 2. NO >> Repair harness or connector. 2. CHECK SPIRAL CABLE Check spiral cable. Is the inspection result normal? YES >> GO TO 3. NO >> Replace spiral cable. Refer to (except for Mexico) or (for Mexico). 3. CHECK AV CONTROL UNIT VOLTAGE 1. Connect AV control unit connector and spiral cable connector. 2. Turn ignition switch ON. 3. Check voltage between AV control unit harness connector. Is the inspection result normal? YES >> GO TO 4. NO >> Replace AV control unit. Refer to 4. CHECK STEERING SWITCH 1. Turn ignition switch OFF. 2. Check steering switch. Refer to AV-139, "Component Inspection" Is the inspection result normal? YES >> INSPECTION END NO >> Replace steering switch. Refer to AV control unit Spiral cable Continuity Connector Terminal Connector Terminal M171 16 M33 31 Existed AV control unit Ground Continuity Connector Terminal M171 16 Not existed (+) ( − ) Voltage (Approx.) AV control unit Connector Terminal Connector Terminal M171 16 M171 15 3.3 V |