Diagnosis Procedure

SOUND SIGNAL CIRCUIT (COUPE)


SATELLITE RADIO TUNER : Diagnosis Procedure

Regarding Wiring Diagram information, refer to Base Audio.

LEFT CHANNEL
1.CHECK HARNESS





1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) connector B57 and audio unit connector M118.
3. Check continuity between satellite radio tuner (factory installed) connector B57 (A) and audio unit connector M118 (B).





4. Check continuity between satellite radio tuner (factory installed) connector B57 (A) and ground.





Are continuity results as specified?
YES - GO TO 2
NO - Repair harness or connector.
2.CHECK LEFT CHANNEL AUDIO SIGNAL
1. Connect satellite radio tuner (factory installed) and audio unit.
2. Turn ignition switch ON.





3. Check signal between satellite radio tuner (factory installed) connector B57 terminals 21 and 22 with CONSULT-III or oscilloscope.





Are voltage readings as specified?
YES - Replace audio unit. Refer to Base Audio.
NO - Replace satellite radio tuner. Refer to Bose Audio.

RIGHT CHANNEL
1.CHECK HARNESS





1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner (factory installed) connector B57 and audio unit connector M118.
3. Check continuity between satellite radio tuner (factory installed) connector B57 (A) and audio unit connector M118 (B).





4. Check continuity between satellite radio tuner (factory installed) connector B57 (A) and ground.





Are continuity results as specified?
YES - GO TO 2
NO - Repair harness or connector.
2.CHECK RIGHT CHANNEL AUDIO SIGNAL
1. Connect satellite radio tuner (factory installed) and audio unit.
2. Turn ignition switch ON.





3. Check signal between satellite radio tuner (factory installed) connector B57 terminals 23 and 24 with CONSULT-III or oscilloscope.





Are voltage readings as specified?
YES - Replace audio unit. Refer to Base Audio.
NO - Replace satellite radio tuner. Refer to Bose Audio.