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AV-144 < COMPONENT DIAGNOSIS > [BOSE AUDIO WITHOUT NAVIGATION] STEERING SWITCH (SEDAN) STEERING SWITCH (SEDAN) Description INFOID:0000000004206465 When one of the steering wheel audio control switches is pushed, the resistance in steering switch circuit changes depending on which button is pushed. Diagnosis Procedure INFOID:0000000004206466 WITH BLUETOOTH 1. CHECK HARNESS 1. Turn ignition switch OFF. 2. Disconnect Bluetooth control unit connector B126 and spiral cable connector M30. 3. Check continuity between Bluetooth control unit connector B126 (A) terminals and spiral cable connector M30 (B) terminals. 4. Check continuity between Bluetooth control unit B126 (A) and ground. Are the continuity test results as specified? YES >> GO TO 2 NO >> Repair harness. 2. CHECK HARNESS 1. Disconnect audio unit connector. 2. Check continuity between audio unit connector M43 (A) termi- nals and Bluetooth control unit connector B126 (B) terminals. Are the continuity test results as specified? YES >> GO TO 3 NO >> Repair harness. 3. SPIRAL CABLE CHECK A B Continuity Connector Terminal Connector Terminal B126 12 M30 24 Yes 13 31 14 33 A - Continuity Connector Terminal B126 12 Ground No 13 14 ALNIA0149ZZ A B Continuity Connector Terminal Connector Terminal M43 6 B126 17 Yes 15 19 16 18 WKIA5349E |