Satellite Radio Tuner Communication Circuit Inspection (Premium System) Audio Without Navigation

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Satellite Radio Tuner Communication Circuit Inspection (Premium System)

1.CHECK HARNESS - 1
1. Turn ignition switch OFF.
2. Disconnect satellite radio tuner connector B56 and AV control unit connector M96.





3. Check continuity between satellite radio tuner harness connector B56 (A) terminal 28 and AV control unit harness connector
M96 (B) terminal 72.






4. Check continuity between satellite radio tuner harness connector B56 (A) terminal 28 and ground.






OK or NG
OK - GO TO 2.
NG - Repair harness or connector.
2.CHECK HARNESS - 2





1. Check continuity between satellite radio tuner harness connector B56 (A) terminal 29 and AV control unit harness connector
M96 (B) terminal 73.






2. Check continuity between satellite radio tuner harness connector B56 (A) terminal 29 and ground.






OK or NG
OK - GO TO 3.
NG - Repair harness or connector.
3.CHECK HARNESS - 3





1. Check continuity between satellite radio tuner harness connector B56 (A) terminal 30 and AV control unit harness connector
M96 (B) terminal 74.






2. Check continuity between satellite radio tuner harness connector B56 (A) terminal 30 and ground.






OK or NG
OK - GO TO 4.
NG - Repair harness or connector.
4.CHECK REQ1 SIGNAL
1. Connect satellite radio tuner connector and AV control unit connector.
2. Turn ignition switch to ACC.





3. Check signal between satellite radio tuner harness connector
B56 terminal 28 and ground with CONSULT-III or oscilloscope.






OK or NG
OK - GO TO 5.
NG - Replace AV control unit. Removal And Installation Audio Without Navigation.
5.CHECK TXD SIGNAL





Check signal between satellite radio tuner harness connector B56 terminal 29 and ground with CONSULT-III or oscilloscope.






OK or NG
OK - GO TO 6.
NG - Replace AV control unit. Removal And Installation Audio Without Navigation.
6.CHECK RXD SIGNAL





Check signal between satellite radio tuner harness connector B56 terminal 30 and ground with CONSULT-III or oscilloscope.






OK or NG
OK - Replace satellite radio tuner. Removal And Installation Audio Without Navigation.
NG - Replace AV control unit. Removal And Installation Audio Without Navigation.