DISPLAY UNIT: Diagnosis Procedure

Regarding Wiring Diagram information, refer to "WIRING DIAGRAM ".

1. CHECK FUSES 

   Check that the following display unit fuses are not blown.

   Unit	Terminals	Signal name	Fuse No.
   Display Unit	11	Battery power	31
   	23	Ignition switch ACC or ON	4

   Are the fuses OK? 

   YES: GO TO 2.

   NO: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse.

2. CHECK POWER SUPPLY CIRCUIT 
   1. Turn ignition switch to ACC
   2. Check voltage between display unit harness connector M168 and ground.

      (+)		(-)	Value (Approx.)
      Connector	Terminal
      M168	11	Ground	Battery voltage
      	23

      Does specified voltage exist? 

      YES: GO TO 3.

      NO:

      • Check connector housings for disconnected or loose terminals.
      • Repair harness or connector.
3. CHECK GROUND CIRCUIT 
   1. Turn ignition switch OFF.
   2. Disconnect display unit connector.
   3. Check continuity between display unit harness connector M168 and ground.

      (+)		(-)	Continuity
      Connector	Terminal
      M168	12	Ground	Yes

      Does continuity exist? 

      YES: Inspection End.

      NO: Repair harness or connector.