Bose Audio Without Navigation

COMMUNICATION SIGNAL CIRCUIT (SEDAN)

SATELLITE RADIO TUNER : Description

Communication signals are exchanged between the audio unit and satellite radio tuner using the communication circuits.


SATELLITE RADIO TUNER : Diagnosis Procedure

Regarding Wiring Diagram information, Sedan.

1. CHECK HARNESS - 1






1.Turn ignition switch OFF.
2.Disconnect satellite radio tuner (factory installed) connector
B123 and audio unit connector M47.
3.Check continuity between satellite radio tuner (factory installed) harness connector B123 (A) terminal 28 and audio unit harness connector M47 (B) terminal 72.
Continuity should exist.
4.Check continuity between satellite radio tuner (factory installed) harness connector B123 (A) terminal 28 and ground.
Continuity should not exist.
Are continuity results as specified?
YES- GO TO 2
NO- Repair harness or connector.

2. CHECK HARNESS - 2






1.Check continuity between satellite radio tuner (factory installed) harness connector B123 (A) terminal 29 and audio unit harness connector M47 (B) terminal 73.
Continuity should exist.
2.Check continuity between satellite radio tuner (factory installed) harness connector B123 (A) terminal 29 and ground.
Continuity should not exist.

Are continuity results as specified?
YES- GO TO 3
NO- Repair harness or connector.

3. CHECK HARNESS - 3






1.Check continuity between satellite radio tuner (factory installed) harness connector B123 (A) terminal 30 and audio unit harness connector M47 (B) terminal 74.
Continuity should exist.
2.Check continuity between satellite radio tuner (factory installed) harness connector B123 (A) terminal 30 and ground.
Continuity should not exist.
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 audio unit connector.
2.Turn ignition switch to ACC





3.Check signal between satellite radio tuner (factory installed) harness connector B123 terminal 28 and ground with CONSULT or oscilloscope.
28 - Ground
Are voltage readings as specified?
YES- GO TO 5
NO- Replace audio unit. Bose Audio Without Navigation.

5. CHECK TXD SIGNAL






Check signal between satellite radio tuner (factory installed) harness connector B123 terminal 29 and ground with CONSULT or oscilloscope.
29 - Ground
Are the voltage readings as specified?
YES- GO TO 6
NO- Replace satellite radio tuner. Bose Audio Without Navigation.

6. CHECK RXD SIGNAL






Check signal between satellite radio tuner (factory installed) harness connector B123 terminal 30 and ground with CONSULT or oscilloscope.
30 - Ground
Are the voltage readings as specified?
YES- Replace satellite radio tuner. Bose Audio Without Navigation.
NO- Replace audio unit. Bose Audio Without Navigation.