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.

   FUSE REFERENCE
   
   

   Unit	Terminals	Signal name	Fuse No.
   Display Unit	2	Battery power	31
   	3	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.
      VOLTAGE SPECIFICATION
      
      

      (+)		(-)	Value (Approx.)
      Connector	Terminal
      M168	2	Ground	Battery voltage
      	3

      Fig 1: Checking Voltage Between Display Unit Harness Connector M168 And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.

      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 CHART
      
      

      (+)		(-)	Continuity
      Connector	Terminal
      M168	1	Ground	Yes
      	13

      Fig 2: Checking Continuity Between Display Unit Harness Connector M168 And Ground

      Courtesy of NISSAN MOTOR CO., U.S.A.

      Does continuity exist? 

      YES: Inspection End.

      NO: Repair harness or connector.