ACtive Noise Control Unit

POWER SUPPLY AND GROUND CIRCUIT

ACTIVE NOISE CONTROL UNIT : Diagnosis Procedure


1. CHECK FUSE

Check for blown fuses.





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

2. CHECK POWER SUPPLY CIRCUIT

Check voltage between active noise control unit harness connector and ground.





Is the inspection result normal?
YES- GO TO 3.
NO- Check harness between active noise control unit and fuse.

3. CHECK GROUND CIRCUIT

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





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