AV Communication Line Check (Between Display Control Unit and NAVI Control Unit).

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

CHECK POWER SUPPLY AND GROUND CIRCUIT
1. Check system of power supply and ground circuit 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.

CONTINUITY CHECK CHART

Terminals				Continuity
NAVI control unit		Display control unit
Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
M63	44 (O)	M43	32 (O)	Yes
M63	45 (B/P)	M43	34 (B/P)	Yes

Check continuity between NAVI control unit and ground.

CONTINUITY CHECK CHART

Terminals			Continuity
NAVI control unit	Ground
Connector		Terminal (Wire color)
M63		44 (O)	No
M63		45 (B/P)	No

Fig 1: Checking Continuity Between NAVI Control Unit And Ground

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.