Diagnosis Procedure
1.CHECK CONNECTOR
2.CHECK HARNESS FOR OPEN CIRCUIT
Check the resistance between the data link connector terminals.

BCM branch line circuit
M&A branch line circuitPower supply and ground circuit
AV CONTROL UNIT
AV CONTROL UNIT : Diagnosis Procedure
1.CHECK FUSES
Check that the following fuses of the AV control unit are not blown.
2.POWER SUPPLY CIRCUIT CHECK
Disconnect AV control unit connectors M115 and M119.
Check voltage between the AV control unit connectors M115 and
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Diagnosis system (audio unit)
Diagnosis Description
Self-diagnosis mode can perform the following items.
Versions display
Channel check diagnosis
Key check diagnosis
AV communication diagnosis
VERSIONS DISPLAY FUNCTION
Turn ignition switch ON.
Turn the audio unit off.
While pressing "1" button, turn volume ...
Audio antenna
Location of Antenna
Audio unit
Audio unit antenna feeder
In-line connectors M103, M501
Antenna amp.
Window antenna
Satellite radio tuner
Satellite radio antenna feeder
Satellite radio antenna
Window Antenna Repair
ELEMENT CHECK
Attach probe circuit tester (ohm sett ...