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 display unit harness connector and ground.

Signal name | Connector No. | Terminal No. | Ignition switch position | Value (Approx.)
Battery power supply | M93 | 11 | OFF | Battery voltage
ACC power supply | 23 | ACC

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

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

   Signal name | Connector No. | Terminal No. | Ignition switch position | Continuity
   Ground | M93 | 12 | OFF | Existed

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