Power Supply and Ground Circuit Check [Audio Unit]

Power Supply and Ground Circuit Check [Audio Unit]

Regarding Wiring Diagram information, refer to [Base Audio System: Wiring Diagram [Base Audio] Base Audio System [Base Audio] ].

1. CHECK FUSES

Check that the following fuses of the audio unit are not are not blown.






Are the fuses OK?
YES
GO TO 2
NO
If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

2. POWER SUPPLY CIRCUIT CHECK

1 Disconnect audio unit connector M43.





2 Check voltage between the audio unit connector M43 ground.






Are the voltage results as specified?
YES
GO TO 3
NO
- Check connector housings for disconnected or loose terminals.
- Repair or replace harness or connector.

3. GROUND CIRCUIT CHECK

Inspect audio unit case ground.

Does case ground pass inspection?
YES
Inspection end.
NO
Repair audio unit case ground.