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AV U1255 SATELLITE RADIO TUNER AV-139 < DTC/CIRCUIT DIAGNOSIS > [MID AUDIO WITHOUT BOSE] C D E F G H I J K L M B A O P Is the inspection result normal? YES >> GO TO 4. NO >> Replace AV control unit. Refer to AV-187, "Removal and Installation" . 4. CHECK SATELLITE RADIO TUNER VOLTAGE 1. Turn ignition switch OFF. 2. Disconnect AV control unit connector M138. 3. Connect satellite radio tuner connector B2. 4. Turn ignition switch ON. 5. Check voltage between satellite radio tuner connector B2 terminal 32 and ground. Is the inspection result normal? YES >> Inspection End. NO >> Replace satellite radio tuner. Refer to AV-199, "Removal and Installation" AV control unit Ground Voltage (Approx.) (+) ( −) Connector Terminal M138 100 — 7.0 V 101 Satellite radio tuner Ground Voltage (Approx.) (+) ( −) Connector Terminal B2 32 — 7.0 V |