1.CHECK FUSE Check for blown fuses.

Power source | Fuse No.
Battery | 34
Ignition switch ACC or ON | 19

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 AV control unit harness connectors and ground.

Signal name | Connector No. | Terminal No. | Ignition switch position | Value (Approx.)
Battery power supply | M201 | 19 | OFF | Battery voltage
ACC power supply | 7 | ACC

Is the inspection result normal?
YES>>GO TO 3.
NO>>Check harness between AV control unit and fuse.
3.CHECK GROUND CIRCUIT

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

   Signal name | Connector No. | Terminal No. | Ignition switch position | Continuity
   Ground | M201 | 20 | OFF | Existed

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