Reverse Signal Check for NAVI 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 REVERSE LAMP
1. Turn ignition switch ON.
2. Place selector lever into R-position. Do back-up lamps come on?
YES or NO
- YES: GO TO 2.
- NO: Check back-up lamp system. Refer to "BACK-UP LAMP ".
CHECK REVERSE SIGNAL
1. Disconnect NAVI control unit connector B152.
2. Turn ignition switch ON.
3. With the selector lever in R-position, check voltage between NAVI control unit and ground.
  
  Fig 1: NAVI Control Unit Connector B152 Terminals And Ground Voltage Specifications
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Voltage Between NAVI Control Unit And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: Replace NAVI control unit. Refer to "REMOVAL AND INSTALLATION OF NAVI CONTROL UNIT ".
- NG: Check harness for open or short between NAVI control unit and back-up lamp position relay.