AV Communication Line Check (Between Display control unit and A/C and AV switch)

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 A/C AND AV SWITCH CIRCUIT

Turn ignition switch OFF.
Disconnect display control unit connector and A/C and AV switch connector.

Check continuity between display control unit and A/C and AV switch.

A/C AND AV SWITCH CIRCUIT CHECK CHART (1 OF 2)

Terminals				Continuity
Display control unit (+)		A/C and AV switch (-)
Connector	Terminal (Wire color)	Connector	Terminal (Wire color)
M43	28 (L/G)	M48	6 (L/G)	Yes
	30 (L/R)		8 (L/R)

Check continuity between display control unit and ground.

A/C AND AV SWITCH CIRCUIT CHECK CHART (2 OF 2)

Terminals			Continuity
Display control unit (+)		(-)
Connector	Terminal (Wire color)
M43	28 (L/G)	Ground	No
	30 (L/R)

Fig 1: Checking Continuity Between Display Control Unit And A/C And AV Switch, And Between Display Control Unit And Ground

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

OK or NG

OK : GO TO 2
NG : Repair harness or connector.

CHECK AV COMMUNICATION SIGNAL
1. Connect display control unit connector and A/C and AV switch connector.
2. Turn ignition switch ON.
3. Check signal between display control unit harness connector M43 terminal 28 (L/G) and 30 (L/R) with CONSULT-II or oscilloscope.
  1. 28 (L/G), 30 (L/R) - Ground : Refer to " TERMINALS AND REFERENCE VALUE FOR DISPLAY CONTROL UNIT ".
Fig 2: Checking Voltage Between Display Control Unit Harness Connector M43 Terminal 28,30 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
1. OK : Replace A/C and AV switch.
2. NG : Replace display control unit.