Power Supply and Ground Circuit Check for Display Unit

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

CHECK FUSE

Check if the following fuses for display unit are blown.

FUSE POWER

Unit	Power souse	Fuse No.
Display unit	Battery power	19
	Ignition switch ACC or ON	4
	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 or GROUND DISTRIBUTION .

CHECK POWER SUPPLY CIRCUIT

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

TERMINAL IGNITION

Terminals			Ignition switch position
(+)		(-)	OFF	ACC	ON
Connector	Terminal (Wire color)
M93	1 (Y/R)	Ground	Battery voltage	Battery voltage	Battery voltage
	2(V)	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 M93 terminal 6 (B) and ground.

Continuity should exist.

OK or NG
1. OK: INSPECTION END.
2. NG: Repair ground harness.
  
  Fig 2: Checking Continuity Between Display Unit Harness Connector M93 Terminal 6 (B) And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.