Power Supply and Ground Circuit Check for 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 FUSES

Check if the following fuses in A/C and AV switch are blown

FUSES CHECK CHART

Unit	Power source	Fuse No.
A/C and AV switch	Battery power	38
A/C and AV switch	Ignition switch ACC or ON	6

OK or NG

OK: GO TO 2.
NG: If fuse is blown be sure to eliminate case of malfunction before installing new fuse. Refer to POWER DISTRIBUTION .

CHECK POWER SUPPLY CIRCUIT

Check voltage between A/C and AV switch and ground.

VOLTAGE CHECK CHART

Terminals			Ignition switch position
(+)		(-)	OFF	ACC	ON
Connector	Terminal (Wire color)	(-)	OFF	ACC	ON
M48	1 (Y)	Ground	Battery voltage	Battery voltage	Battery voltage
M48	2 (P/B)	Ground	0V	Battery voltage	Battery voltage

Fig 1: Checking Voltage Between A/C And AV Switch And Ground

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

OK or NG

OK: GO TO 3.
NG: Check harness for open or short between A/C and AV switch and fuse.

CHECK GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/C and AV switch connector.
3. Check continuity between A/C and AV switch harness connector M48 terminals 5 (B) and ground.
  Continuity should exist.
  
  Fig 2: Checking Continuity Between A/C And AV Switch Harness Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: INSPECTION END.
2. NG: Repair ground harness.