Power Supply and Ground Circuit Check for NAVI 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 NAVI control unit are not blown.

CHECK FUSE

Terminals		Power source	Fuse No.
Connector	Terminal (Wire color)
B151	2 (Y), 3 (Y)	Battery power	31
	6(O)	ACC power	4

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 .

CHECK POWER SUPPLY CIRCUIT

Disconnect NAVI control unit connector.

Check voltage between connector terminals and ground as follows.

NAVI CONTROL UNIT CONNECTOR TERMINALS VOLTAGE

Terminals			Ignition switch position
(+)		(-)	OFF	ACC	ON
Connector	Terminal (Wire color)	(-)	OFF	ACC	ON
B151	2 (Y), 3 (Y)	Ground	Battery voltage	Battery voltage	Battery voltage
B151	6 (O)	Ground	0 V	Battery voltage	Battery voltage

Fig 1: Checking Volage Between NAVI 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 NAVI control unit and fuse.

CHECK GROUND CIRCUIT

Check continuity between the following NAVI control unit and ground.

NAVI CONTROL UNIT CONNECTOR TERMINALS CONTINUITY

Terminals			Ignition switch	Continuity
Connector	Terminal (Wire color)	---	Ignition switch	Continuity
B151	1 (B), 4 (B)	Ground	OFF	Yes

Fig 2: Checking Continuity Between NAVI 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.