SOUND SIGNAL CIRCUIT (SEDAN)
SATELLITE RADIO TUNER : Description
Left and right channel audio signals are supplied from the satellite radio tuner to the audio unit through the sound signal circuits.
SOUND SIGNAL CIRCUIT (SEDAN)
SATELLITE RADIO TUNER : Diagnosis Procedure
LEFT CHANNEL
1.CHECK HARNESS
- Turn ignition switch OFF.
- Disconnect satellite radio tuner (factory installed) connector B123 and audio unit connector M45.
- Check continuity between satellite radio tuner (factory installed) connector B123 (A) and audio unit connector M45 (B).
- Check continuity between satellite radio tuner (factory installed) connector B123 (A) and ground.
Are continuity results as specified?
YES >> GO TO 2
NO >> Repair harness or connector.
2.CHECK LEFT CHANNEL AUDIO SIGNAL
- Connect satellite radio tuner (factory installed) and audio unit.
- Turn ignition switch ON.
- Check signal between satellite radio tuner (factory installed) connector B123 terminals 21 and 22 with CONSULT-III or oscilloscope.
Are voltage readings as specified?
YES >> Replace audio unit. Refer to See: Radio/Stereo\Service and Repair\Audio Unit\Bose Audio Without Navigation.
NO >> Replace satellite radio tuner. Refer to See: Radio/Stereo\Service and Repair\Satellite Radio Tuner\Removal And Installation - Sedan\Bose Audio Without Navigation.
RIGHT CHANNEL
1.CHECK HARNESS
- Turn ignition switch OFF.
- Disconnect satellite radio tuner (factory installed) connector B123 and audio unit connector M45.
- Check continuity between satellite radio tuner (factory installed) connector B123 (A) and audio unit connector M45 (B).
- Check continuity between satellite radio tuner (factory installed) connector B123 (A) and ground.
Are continuity results as specified?
YES >> GO TO 2
NO >> Repair harness or connector.
2.CHECK RIGHT CHANNEL AUDIO SIGNAL
- Connect satellite radio tuner (factory installed) and audio unit.
- Turn ignition switch ON.
- Check signal between satellite radio tuner (factory installed) connector B123 terminals 23 and 24 with CONSULT-III or oscilloscope.
Are voltage readings as specified?
YES >> Replace audio unit. Refer to See: Radio/Stereo\Service and Repair\Audio Unit\Bose Audio Without Navigation.
NO >> Replace satellite radio tuner. Refer to See: Radio/Stereo\Service and Repair\Satellite Radio Tuner\Removal And Installation - Sedan\Bose Audio Without Navigation.
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