Reverse Signal Check (With A/T)

WARNING: This page is about a different car, the 2004 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

REVERSE LAMP CHECK
1. Turn the ignition switch ON.
2. With the A/T selector lever in R-position. Is the indicator turned
YES or NO
1. YES: GO TO 2.
2. NO: Check back up lamp system. Refer to BACK-UP LAMP .
REVERSE SIGNAL CHECK
1. With the A/T selector lever in R-position.
2. Check voltage between NAVI control unit and ground.
  
  Fig 1: NAVI Control Unit And Ground Voltage Table
  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
1. OK: Replace NAVI control unit.
2. NG: Check harness for open or short between NAVI control unit and back up lamp relay.