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AV-228 < COMPONENT DIAGNOSIS > [BOSE AUDIO WITH NAVIGATION] STEERING SWITCH STEERING SWITCH Description INFOID:0000000004219589 When one of the steering wheel audio control switches is pushed, the resistance in the steering switch circuit changes depending on which button is pushed. Diagnosis Procedure INFOID:0000000004219590 1. CHECK HARNESS 1. Turn ignition switch OFF. 2. Disconnect AV control unit connector M46 and spiral cable connector M30. 3. Check continuity between AV control unit connector M46 (A) ter- minals 25, 26, and 27 and spiral cable connector M30 (B) termi- nals 24, 31, and 33. 4. Check continuity between AV control unit connector M46 and ground. Are the continuity test results as specified? YES >> GO TO 2 NO >> Repair harness. 2. SPIRAL CABLE CHECK 1. Disconnect spiral cable connector M88. 2. Check continuity between spiral cable harness connector M30 (A) and M88 (B). Are the continuity test results as specified? YES >> GO TO 3. NO >> Replace spiral cable. Refer to SRS-8, "Removal and Installation" . 3. CHECK STEERING SWITCH Check steering switch. Refer to AV-229, "Component Inspection" . Does the steering switch pass inspection? YES >> Inspection End. NO >> Replace steering switch. Refer to AV-291, "Removal and Installation" A B Continuity Connector Terminal Connector Terminal M46 25 M30 24 Yes 26 33 27 31 A – Continuity Connector Terminal M46 25 Ground No 26 27 ALLIA0255ZZ A B Continuity Connector Terminal Connector Terminal M30 24 M88 14 Yes 31 15 33 17 ALNIA0931GB |