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AV STEERING SWITCH SIGNAL B CIRCUIT AV-457 < COMPONENT DIAGNOSIS > [BOSE AUDIO WITH NAVIGATION] C D E F G H I J K L M B A O P STEERING SWITCH SIGNAL B CIRCUIT Description INFOID:0000000001558896 Transmits the steering switch signal to AV control unit. Diagnosis Procedure INFOID:0000000001558897 1. CHECK STEERING SWITCH SIGNAL B CIRCUIT 1. Disconnect AV control unit connector and spiral cable connector. 2. Check continuity between AV control unit harness connector terminal 16 and spiral cable harness connec- 3. Check continuity between AV control unit harness connector terminal 16 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. 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 terminals 16 and 15. Is the inspection result normal? YES >> GO TO 4. NO >> Replace AV control unit. 4. CHECK STEERING SWITCH 1. Turn ignition switch OFF. 2. Check steering switch. Refer to AV-457, "Component Inspection" Is the inspection result normal? YES >> INSPECTION END NO >> Replace steering switch. Component Inspection INFOID:0000000001558898 Measure the resistance between the steering switch connector terminals 14 to 17 and 15 to 17. 16 - 31 : Continuity should exist. 16 - Ground : Continuity should not exist. 16 - 15 : Approx. 5 V |