Component Tests and General Diagnostics

POWER SUPPLY AND GROUND CIRCUIT

NAVI CONTROL UNIT : Diagnosis Procedure


1. CHECK FUSE

Check for blown fuses.





Is inspection result OK?
YES- GO TO 2.
NO- Be sure to eliminate cause of malfunction before installing new fuse.

2. CHECK POWER SUPPLY CIRCUIT

Check voltage between NAVI control unit harness connector and ground.





Is inspection result OK?
YES- GO TO 3.
NO- Check harness between NAVI control unit and fuse.

3. CHECK GROUND CIRCUIT

1.Turn ignition switch OFF.
2.Disconnect NAVI control unit connector.
3.Check continuity between NAVI control unit harness connector and ground.





Is inspection result OK?
YES- INSPECTION END
NO- Repair harness or connector.