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AV-260 < DTC/CIRCUIT DIAGNOSIS > [COLOR DISPLAY - W/O BOSE] COMMUNICATION SIGNAL CIRCUIT 3. CHECK HARNESS - 3 1. Check continuity between satellite radio tuner (factory installed) harness connector B111 (A) terminal 30 and AV control unit har- ness connector M116 (B) terminal 30. 2. Check continuity between satellite radio tuner (factory installed) harness connector B111 (A) terminal 30 and ground. Are continuity results as specified? YES >> GO TO 4. NO >> Repair harness or connector. 4. CHECK REQ1 SIGNAL 1. Connect satellite radio tuner (factory installed) connector and AV control unit connector. 2. Turn ignition switch to ACC. 3. Check signal between satellite radio tuner (factory installed) har- ness connector B111 terminal 28 and ground with CONSULT or oscilloscope. Are voltage readings as specified? YES >> GO TO 5. NO >> Replace AV control unit. Refer to AV-311, "Removal and Installation" 5. CHECK TXD SIGNAL Check signal between satellite radio tuner (factory installed) harness connector B111 terminal 29 and ground with CONSULT or oscillo- scope. A B Continuity Connector Terminal Connector Terminal B111 30 M116 30 Yes A — Continuity Connector Terminal B111 30 Ground No ALNIA0658GB (+) (-) Reference signal Connector Terminal B111 28 Ground WKIA4544E SKIB3825E (+) (-) Reference signal Connector Terminal B111 29 Ground WKIA4545E SKIB3824E |