AV Communication Line Check (Between Display Control Unit and A/C and AV Switch)

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 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.

CONTINUITY CHECK CHART

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
M43	30 (L/R)	M48	8 (L/R)	Yes

Check continuity between display control unit and ground.

CONTINUITY CHECK CHART

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

Fig 1: Checking Continuity 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 SELF-DIAGNOSIS OF DCU
1. Replace A/C and AV switch.
2. Connect display control unit connector and A/C and AV switch 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.