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Vehicle » Accessories and Optional Equipment » Radio, Stereo, and Compact Disc » Testing and Inspection » Component Tests and General Diagnostics » Communication Signal Circuit (Sedan) » Bose Audio Without Navigation  
 
 
  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.

COMMUNICATION SIGNAL CIRCUIT (SEDAN)

SATELLITE RADIO TUNER : Diagnosis Procedure

1.CHECK HARNESS - 1

  

  1. Turn ignition switch OFF.
  2. Disconnect satellite radio tuner (factory installed) connector B123 and audio unit connector M45.
  3. Check continuity between satellite radio tuner (factory installed) harness connector B123 (A) terminal 28 and audio unit harness connector M45 (B) terminal 38.

Continuity should exist.

  1. 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 M45 (B) terminal 39.

Continuity should exist.

  1. 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 M45 (B) terminal 40.

Continuity should exist.

  1. 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

  

  1. Check signal between satellite radio tuner (factory installed) harness connector B123 terminal 28 and ground with CONSULT-III or oscilloscope.

  

Are voltage readings as specified?
YES >> GO TO 5
NO >> Replace audio unit. Refer to See: Radio/Stereo\Service and Repair\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-III or oscilloscope.

  

Are the voltage readings as specified?
YES >> GO TO 6
NO >> Replace satellite radio tuner. Refer to See: Radio/Stereo\Service and Repair\Satellite Radio Tuner\Removal And Installation - Sedan\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-III or oscilloscope.

  

Are the voltage readings as specified?
YES >> Replace satellite radio tuner. Refer to See: Radio/Stereo\Service and Repair\Satellite Radio Tuner\Removal And Installation - Sedan\Bose Audio Without Navigation.
NO >> Replace audio unit. Refer to See: Radio/Stereo\Service and Repair\Audio Unit\Bose Audio Without Navigation.