Power Supply and Ground Circuit Check for Display Unit

WARNING: This page is about a different car, the 2003 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE

Check if the following fuses in display are blown.

DISPLAY UNIT FUSE CHART

Unit	Power Source	Fuse No.
Display	Battery power	38
	Ignition switch ACC or ON	6
	Ignition switch ON or START	12

OK or NG

OK : GO TO 2.
NG : If fuse is blown be sure to eliminate case of malfunction before installing new fuse. Refer to POWER DISTRIBUTION .

CHECK POWER SUPPLY CIRCUIT

Disconnect display connector.
Check voltage between display unit connector and ground.

DISPLAY UNIT POWER SUPPLY CIRCUIT CHART

Terminals			Ignition switch position
(+)		(-)	OFF	ACC	ON
Connector	Terminal (Wire color)	(-)	OFF	ACC	ON
M39	1 (Y)	Ground	Battery voltage	Battery voltage	Battery voltage
	2 (P/B)	Ground	0V	Battery voltage	Battery voltage
	3 (G)	Ground	0V	0V	Battery voltage

Fig 1: Checking Voltage Between Display Unit Connector And Ground

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

OK or NG

OK : GO TO 3.
NG : Check harness for open or short between display and fuse.

CHECK GROUND CIRCUIT
Check continuity between Display unit harness connector M39 terminal 6 (B) and ground.
1. Continuity should exist.
OK or NG
1. OK : Inspection end.
2. NG : Repair ground harness.
Fig 2: Checking Continuity Between Display Unit Harness Connector M39 Terminal 6 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.