AV Communication Line Check (Between Display Control Unit and 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 POWER SUPPLY AND GROUND CIRCUIT
1. Check power supply and ground circuit for NAVI control unit. Refer to , "POWER SUPPLY AND GROUND CIRCUIT CHECK FOR NAVI CONTROL UNIT ".
OK or NG
1. OK : GO TO 2.
2. NG : Check the malfunctioning parts.

CHECK HARNESS

Turn ignition switch OFF.
Disconnect NAVI control unit connector and display control unit connector.

Check continuity between NAVI control unit and display control unit.

NAVI CONTROL UNIT AND DISPLAY CONTROL UNIT TERMINALS CONTINUITY

Terminals				Continuity
NAVI control unit		Display control unit
Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
B152	44 (L)	M95	32 (L)	Yes
	45 (P)		34 (P)

Check continuity between NAVI control unit and ground.

>NAVI CONTROL UNIT TERMINALS CONTINUITY

Terminals			Continuity
NAVI control unit		---
Connector	Terminal (Wire color)
B152	44 (L)	Ground	No
	45 (P)

Fig 1: Checking Continuity Between NAVI Control Unit And Display Control Unit Terminals

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

OK or NG

OK : GO TO 3.
NG : Repair harness or connector.

CHECK SELF-DIAGNOSIS OF DCU
1. Replace NAVI control unit.
2. Connect NAVI control unit connector and display control unit connector.
3. Turn ignition switch ON.
4. Start self-diagnosis of DCU and check the self-diagnosis result.
OK or NG
1. OK : INSPECTION END.
2. NG : Replace display control unit. Refer to , "REMOVAL AND INSTALLATION OF DISPLAY CONTROL UNIT".