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

WARNING: This page is about a different car, the 2003 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.

NAVI CONTROL UNIT AND DISPLAY CONTROL UNIT CIRCUIT HARNESS 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
	45 (B/P)		34 (B/P)

Check continuity between NAVI control unit and ground.

NAVI CONTROL UNIT CONNECTOR TERMINALS CONTINUITY CHECK CHART

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

OK or NG

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

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

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

CHECK AV COMMUNICATION SIGNAL
1. Connect NAVI control unit connector and display control unit connector.
2. Turn ignition switch ON.
3. Check signal between NAVI control unit harness connector M63 terminal 44 (O) and 45 (B/P) with CONSULT-II or oscilloscope.
  1. 44 (O), 45 (B/P)-Ground : Refer to " TERMINALS AND REFERENCE VALUE FOR NAVI CONTROL UNIT " .
OK or NG
1. OK : Replace display control unit.
2. NG : Replace NAVI control unit.
Fig 2: Checking Voltage Between NAVI Control Unit Connector Terminals M63 Terminal 44,45 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.