Power Supply and Ground Circuit Check for A Switch

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

CHECK FUSES

Check the fuses below.

FUSE CHECK

Unit	Power source	Fuse No.
AV switch	Battery power	19
AV switch	Ignition switch ACC or ON	4

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 or GROUND DISTRIBUTION .

CHECK POWER SUPPLY CIRCUIT

Disconnect A switch connector.
Check voltage between A switch and ground.

CHECK VOLTAGE

Terminals			Ignition switch position
(+)		(-)	OFF	ACC	ON
Connector	Terminal (Wire color)
M98	1 (Y/R)	Ground	Battery voltage	Battery voltage	Battery voltage
	2(V)	Ground	0V	Battery voltage	Battery voltage

OK or NG

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

Fig 1: Checking Voltage Between A Switch And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK GROUND CIRCUIT
1. Check continuity between A switch harness connector M98 terminal 5 (B) and ground.
1. Continuity should exist.
OK or NG
1. OK: INSPECTION END.
2. NG: Repair ground harness.
  
  Fig 2: Checking Continuity Between A Switch Harness Connector M98 Terminal 5
  Courtesy of NISSAN MOTOR CO., U.S.A.