Diagnosis Procedure

1. Check that the following fuses are not blown:

   Terminal No.	Signal name	Fuse No.	Capacity
   20	Ignition power supply	55	5A
   32	Battery power supply	44	15A

Are the fuses blown?

YES>>

Replace the blown fuse after repairing the affected circuit.

NO>>

GO TO 2.

1. 1. Ignition switch OFF.
   2. Disconnect active noise control unit connector.
   3. Check voltage between active noise control unit connector and ground.

      Active noise control unit		Ground	Condition	Voltage(Approx.)
      Connector	Terminal
      M87	32	-	Ignition switch: OFF	Battery voltage
      	20		Ignition switch: ON

Is the inspection result normal?

YES>>

GO TO 3.

NO>>

Repair or replace harness or connectors.

1. 1. Ignition switch OFF.
   2. Check continuity between active noise control unit connector and ground.

      Active noise control unit		Ground	Continuity
      Connector	Terminal
      M87	23	Ground	Yes

Is the inspection result normal?

YES>>

Inspection End

NO>>

Repair or replace harness or connectors.