Power Supply and Ground Circuit Check for Display Control Unit

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE
Make sure the following fuses of display control unit are not blown.

Fig 1: Display Control Unit - Fuse Check Reference
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: GO TO 2.
- NG: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to "POWER SUPPLY ROUTING CIRCUIT ".
CHECK POWER SUPPLY CIRCUIT
1. Disconnect display control unit connector M94.
2. Check voltage between connector terminals and ground as follows.
  
  Fig 2: Display Control Unit Connector M94 Terminals And Ground Voltage Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Voltage Between Display Control Unit Connector Terminals And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 3.
- NG: Check harness for open or short between display control unit and fuse.
CHECK GROUND CIRCUIT
Check continuity between the following display control unit connector terminals and ground.

Fig 4: Display Control Unit Connector M94 Terminals And Ground Continuity Specifications
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: Checking Continuity Between Display Control Unit Connector Terminals And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- OK: Inspection End.
- NG: Repair or replace harness.