Diagnosis Procedure

1. Turn ignition switch OFF.
2. Check that the following fuses are not blown:

   Power source	Fuse No.	Capacity
   Battery	15	20 A
   Ignition switch ACC	21	10 A
   Ignition switch ON or START	30	10 A

Is a fuse blown?

YES

Replace the blown fuse after repairing the affected circuit.

NO

GO TO 2 .

1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M162.
3. Check the voltage between AV control unit connector M162 and ground.

   AV control unit		Ground	Voltage (Approx.)
   Connector	Terminal
   M162	19	(-)	Battery voltage

Is the inspection result normal?

YES

GO TO 3 .

NO

Repair or replace harness or connectors.

1. Turn ignition switch to ACC.
2. Check the voltage between AV control unit connector M162 and ground.

   AV control unit		Ground	Voltage (Approx.)
   Connector	Terminal
   M162	7	(-)	Battery voltage

Is the inspection result normal?

YES

GO TO 4 .

NO

Repair or replace harness or connectors.

1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M163.
3. Turn ignition switch to ON.
4. Check the voltage between AV control unit connector M163 and ground.

   AV control unit		Ground	Voltage (Approx.)
   Connector	Terminal
   M163	31	(-)	Battery voltage

Is the inspection result normal?

YES

GO TO 5 .

NO

Repair or replace harness or connectors.

1. Turn ignition switch OFF.
2. Check the continuity between AV control unit case and ground.

Is the inspection result normal?

YES

Inspection End.

NO

Repair or replace harness or connectors.