Power Supply and Ground Circuit Check for Display Unit

1. Disconnect display unit connector.
2. Turn ignition switch ON.
3. Check voltage between display unit harness connector M93 terminals 2, 3 and ground.

   Approx. 9V 

Fig 1: Checking Voltage Between Display Unit Harness Connector M93 Terminals 2, 3 And Ground

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

OK or NG 

OK: GO TO 2.

NG: GO TO 3.

1. Turn ignition switch OFF.
2. Check continuity between display unit and ground as follows.
   GROUND CIRCUIT
   
   

   Terminals			Continuity
   (+)		(-)
   Connector	Terminal
   M93	1	Ground	Yes

   Fig 2: Checking Continuity Between Display Unit And Ground

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

OK or NG 

OK: Inspection End.

NG: Repair harness.

Check voltage between display control unit harness connector M94 terminals 2, 4 and ground.

Approx. 9V 

Fig 3: Checking Voltage Between Display Control Unit Harness Connector M94 Terminals 2, 4 And Ground

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

OK or NG 

OK: Repair harness.

NG: GO TO 4.

1. Turn ignition switch OFF.
2. Disconnect display control unit connector M94.
3. Check continuity between display control unit harness connector M94 terminals 2, 4 and display unit harness connector M93 terminals 2, 3.
   DISPLAY CONTROL UNIT HARNESS CONNECTOR M94 TERMINALS 2, 4 AND DISPLAY UNIT HARNESS CONNECTOR M93 TERMINALS 2, 3
   
   

   Terminals				Continuity
   Display control unit (+)		Display unit (-)
   Connector	Terminal	Connector	Terminal
   M94	2	M93	2	Yes
   	4		3

4. Check continuity between display unit and ground.
   DISPLAY UNIT AND GROUND
   
   

   Terminals			Continuity
   Display unit (+)		(-)
   Connector	Terminal
   M93	2	Ground	No
   	3

   Fig 4: Checking Continuity Between Display Control Unit Connector M94 Terminals 2, 4 And Connector M93 Terminals 2, 3

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

OK or NG 

OK: Replace display control unit. Refer to "DISPLAY CONTROL UNIT ".

NG: Repair harness.