Power Supply and Ground Circuit Check for Display Control Unit

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

CHECK FUSE

Make sure the following fuses of the display control unit are not blown.

CHECK FUSE

Terminals		Power source	Fuse No.
Connector	Terminal (Wire color)	Power source	Fuse No.
M94	1 (Y)	Battery power	31
	10 (O)	ACC power	4
	12 (G/R)	IGN power	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 control unit connector.

Check voltage between connector terminals and ground as follows.

DISPLAY CONTROL UNIT CONNECTOR TERMINALS VOLTAGE

Terminals			Ignition switch position
(+)		(-)	OFF	ACC	ON
Connector	Terminal (Wire color)
M94	1 (Y)	Ground	Battery voltage	Battery voltage	Battery voltage
	10 (O)		0 V	Battery voltage	Battery voltage
	12 (G/R)		0 V	0 V	Battery voltage

Fig 1: Checking Voltage Between Display Control Unit Connector Terminals 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 control unit and fuse.

CHECK GROUND CIRCUIT

Check continuity between the following display control unit and ground.

DISPLAY CONTROL UNIT TERMINALS CONTINUITY

Terminals			Ignition switch	Continuity
Connector	Terminal (Wire color)	---	Ignition switch	Continuity
M94	3 (B)	Ground	OFF	Yes

Fig 2: Checking Continuity Between Display Control Unit Connector Terminals And Ground

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

OK or NG

OK : INSPECTION END.
NG : Repair or replace harness.