Reverse Signal Check for Display Control Unit

WARNING: This page is about a different car, the 2006 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 A/T 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

Disconnect display control unit connector M94.
Turn ignition switch ON.

With the A/T selector lever in R-position, check voltage between display control unit and ground.

DISPLAY CONTROL UNIT AND GROUND VOLTAGE DESCRIPTION

Terminals			Selector lever position
(+)		(-)	Selector lever position
Connector	Terminal	(-)	R-position	Other than R-position
M94	6	Ground	Battery voltage	Approx. 0V

Fig 1: Identifying Voltage Between Display Control Unit And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK : Replace display control unit. Refer to "DISPLAY CONTROL UNIT ".
NG : Check harness for open or short between display control unit and back-up lamp position relay.