Power Supply and Ground Circuit Check for NAVI Control Unit

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE
Check that the following fuses of the NAVI control unit are not blown.

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

OK or NG
1. OK: GO TO 2.
2. NG: If fuse is blown, be sure to eliminate case of malfunction before installing new fuse. Refer to POWER SUPPLY ROUTING CIRCUIT .
POWER SUPPLY CIRCUIT CHECK
Check voltage between the following harness connector terminals and ground.

Fig 2: Power Supply Circuit Harness Connector Terminals And Ground Voltage Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 3: Checking Voltage Between Harness Connector Terminals And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK: GO TO 3.
2. NG: Check harness for open or short between NAVI control unit and fuse.
GROUND CIRCUIT CHECK
1. Turn ignition switch OFF.
2. Disconnect the NAVI control unit connector.
3. Check continuity between the following NAVI control unit harness connector and ground.
  
  Fig 4: NAVI Control Unit Harness Connector And Ground Continuity Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Continuity Between NAVI Control Unit Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Inspection end.
2. NG: Repair harness or connector.