Power Supply and Ground Circuit Check for Monochrome Display Unit

WARNING: This page is about a different car, the 2006 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 REFERENCE

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 cause of malfunction before installing new fuse. Refer to , "POWER SUPPLY ROUTING CIRCUIT ".

CHECK POWER SUPPLY CIRCUIT

Disconnect display unit connector.

Check voltage between display unit connector and ground.

POWER SUPPLY CIRCUIT

Terminals			Ignition switch position
(+)		(-)	OFF	ACC	ON
Connector	Terminal	(-)	OFF	ACC	ON
M93	1	Ground	Battery voltage	Battery voltage	Battery voltage
	2	Ground	0V	Battery voltage	Battery voltage
	3	Ground	0V	0V	Battery voltage

Fig 1: Checking Power Supply Circuit

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

OK or NG

OK: GO TO 3.

NG: Check harness for open between display and fuse.

CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between display unit harness connector M93 terminal 6 and ground.
  Continuity should exist.
Fig 2: Checking Ground Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG

OK: Inspection End.

NG: Repair ground harness.