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AV COMMUNICATION SIGNAL CIRCUIT AV-133 < DTC/CIRCUIT DIAGNOSIS > [PREMIUM WITHOUT NAVIGATION] C D E F G H I J K L M B A O P COMMUNICATION SIGNAL CIRCUIT SATELLITE RADIO TUNER INFOID:0000000006166522 Communication signals are exchanged between the audio unit and satellite radio tuner using the communica- tion circuits. SATELLITE RADIO TUNER : Diagnosis Procedure INFOID:0000000006166523 Regarding Wiring Diagram information, refer to AV-151, "Wiring Diagram - Without Navigation System" 1. CHECK HARNESS - REQ1 1. Turn ignition switch OFF. 2. Disconnect satellite radio tuner (factory installed) connector M41 and audio unit connector M170. 3. Check continuity between satellite radio tuner (factory installed) harness connector M41 (A) terminal 28 and audio unit harness connector M170 (B) terminal 48. 4. Check continuity between satellite radio tuner (factory installed) harness connector M41 (A) terminal 28 and ground. Are continuity results as specified? YES >> GO TO 2. NO >> Repair harness or connector. 2. CHECK HARNESS - TXD 1. Check continuity between satellite radio tuner (factory installed) harness connector M41 (A) terminal 29 and audio unit harness connector M170 (B) terminal 49. 2. Check continuity between satellite radio tuner (factory installed) harness connector M41 (A) terminal 29 and ground. Are continuity results as specified? YES >> GO TO 3. NO >> Repair harness or connector. A B Continuity Connector Terminal Connector Terminal M41 28 M170 48 Yes A — Continuity Connector Terminal M41 28 Ground No ALNIA0709GB A B Continuity Connector Terminal Connector Terminal M41 29 M170 49 Yes A — Continuity Connector Terminal M41 29 Ground No ALNIA0707GB |