Power Supply And Ground Circuit Check For Av And NAVI Control Unit Or Av Control Unit

WARNING: This page is about a different car, the 2002 Infiniti Q45. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE

Fig 1: Fuses To 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 cause of problem before installing new fuse. Refer to POWER DISTRIBUTION .
POWER SUPPLY CIRCUIT CHECK
1. Disconnect the connector B30, M78 or B33.
  - B30 : AV and NAVI control unit
  - M78 : AV control unit (without rear control switch)
  - B33 : AV control unit (with rear control switch)
2. Check voltage between the following harness connector terminal and ground.
  
  Fig 2: Power Supply Circuit Check (1 Of 2)
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Power Supply Circuit Check (2 Of 2)
  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 AV and NAVI control unit or AV control unit and fuse.
GROUND CIRCUIT CHECK
Check continuity between the following AV and NAVI control unit connector or AV control unit and ground.

Fig 4: Ground Circuit Check (1 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 5: Ground Circuit Check (2 Of 2)
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK >> inspection end.
2. NG >> Replace AV and NAVI control unit or AV control unit ground circuit harness.