Reverse Signal Check for NAVI Control Unit

1. Turn ignition switch ON.
2. Selector lever into R-position.

Does "R" in the shift position indicator come on? 

1. YES : GO TO 2.
2. NO : Check back-up lamp system. Refer to "BACK-UP LAMP ".

With the selector lever in R-position, check voltage between NAVI control unit and ground.

Fig 1: Terminal Voltage Specification

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.