Door Mirror Defogger Power Supply Circuit Check

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 FUSE

FUSE CHECKING

Check if any of the following fuses for fuse block (J/B) are blown.
COMPONENT PARTS	TERMINAL NO. (SIGNAL)	AMPERE	FUSE NO.
Fuse block (J/B)	5N (Battery power supply)	10A	#8

NOTE: Refer to "COMPONENT PARTS AND HARNESS CONNECTOR LOCATION ".

OK or NG

OK: GO TO 2.
NG: If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to "COMPONENT PARTS AND HARNESS CONNECTOR LOCATION ".

CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT 1

Turn ignition switch ON.
Check voltage between fuse block (J/B) connector and ground.

FUSE BLOCK (J/B) CONNECTOR VOLTAGE

Connector	Terminal (Wire color)		Condition	Voltage (V)(Approx.)
	(+)	(-)
E30	2Q(G)	Ground	Rear window defogger switch ON	Battery voltage
			Rear window defogger switch OFF	0

OK or NG

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

Fig 1: Checking Voltage Between Fuse Block (J/B) Connector And Ground

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

CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT 2

Check voltage between fuse block (J/B) connector and ground.

FUSE BLOCK (J/B) CONNECTOR VOLTAGE

Connector	Terminal (Wire color)		Condition	Voltage (V)(Approx.)
	(+)	(-)
M3	5N (L/B)	Ground	Rear window defogger switch ON	Battery voltage
			Rear window defogger switch OFF	0

OK or NG

Fig 2: Checking Voltage Between Fuse Block (J/B) Connector And Ground

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

OK: GO TO 4.
NG: Replace fuse block (J/B).

CHECK DOOR MIRROR DEFOGGER CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect fuse block (J/B) and door mirror LH or RH.
3. Check continuity between fuse block (J/B) connector M3 terminal 5N and door mirror connector D13 (LH) or D113(RH) terminal 6.
1. 5N (L/B) - 6 (L/B): Continuity should exist.
OK or NG
1. OK: GO TO 5.
2. NG: Repair or replace harness.
Fig 3: Checking Continuity Between Fuse Block (J/B) Connector M3 Terminal 5N And Door Mirror Connector D13 (LH) Or D113(RH) Terminal 6
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DOOR MIRROR DEFOGGER GROUND CIRCUIT
Check continuity between each door mirror connector D13 (LH) or D113 (RH) terminal 5 and ground.
1. 5 (B) - Ground: Continuity should exist.
OK or NG
1. OK: GO TO 6.
2. NG: Repair or replace harness.
Fig 4: Checking Continuity Between Each Door Mirror Connector D13 (LH) Or D113 (RH) Terminal 5 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DOOR MIRROR DEFOGGER
1. Connect door mirror LH or RH.
2. Check continuity between each door mirror connector D13 (LH), D113 (RH) terminals 5 and 6.
  1. 6(L/B) 5(B): Continuity should exist.
  OK or NG
  1. OK: Check the condition of the harness and the connector.
  2. NG: Replace malfunctioning door mirror LH or RH.
Fig 5: Checking Continuity Between Each Door Mirror Connector D13 (LH), D113 (RH) Terminals 5 And 6
Courtesy of NISSAN MOTOR CO., U.S.A.