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AV-56 < COMPONENT DIAGNOSIS > [BASE AUDIO WITHOUT NAVIGATION] STEERING SWITCH SIGNAL B CIRCUIT STEERING SWITCH SIGNAL B CIRCUIT Description INFOID:0000000000964578 Transmits the steering switch signal to AV control unit. Diagnosis Procedure INFOID:0000000000964579 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 terminals 16 and ground. Is inspection result OK? YES >> GO TO 2. NO >> Repair harness or connector. 2. CHECK SPIRAL CABLE Check spiral cable. Is inspection result OK? 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 inspection result OK? YES >> GO TO 4. NO >> Replace AV control unit. 4. CHECK STEERING SWITCH 1. Turn ignition switch OFF. 2. Check steering switch. Refer to . Is inspection result OK? YES >> INSPECTION END NO >> Replace steering switch. Component Inspection INFOID:0000000000964580 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. 3.3 V |