Door Mirror Defogger Power Supply Circuit Check

WARNING: This page is about a different car, the 2005 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE

Check if any of the following fuses for fuse block (J/B) are blown.

FUSE SPECIFICATION TABLE

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
1. Turn ignition switch ON.
2. Check voltage between fuse block (J/B) connector and ground.
  
  Fig 1: Terminals Voltage Reference Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 2: Checking Voltage Between Fuse Block (J/B) Connector Terminal 20 & Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 3.
- NG: Repair or replace harness.
CHECK DOOR MIRROR DEFOGGER POWER SUPPLY CIRCUIT 2
Check voltage between fuse block (J/B) connector and ground.

Fig 3: Checking Voltage Between Fuse Block (J/B) Connector Terminal 5N & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Fig 4: Terminals Voltage Reference Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

OK or NG
- 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.
  5N (L/B) - 6 (L/B): Continuity should exist.
OK or NG
- OK: GO TO 5.
- NG: Repair or replace harness.
  
  Fig 5: Checking Continuity Between Connector M3 Terminal 5N And 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.

Fig 6: Checking Continuity Between Connector D13 (LH) Or D113 (RH) Terminal 5 & Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

5 (B) - Ground: Continuity should exist.

OK or NG
- OK: GO TO 6.
- NG: Repair or replace harness.
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.
  
  Fig 7: Checking Continuity Between Door Mirror Connector D13 (LH), D113 (RH) Terminals 5 & 6
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  6 (L/B) - 5 (B): Continuity should exist.
OK or NG
- OK: Check the condition of the harness and the connector.
- NG: Replace malfunctioning door mirror LH or RH. Refer to "DOOR MIRROR ASSEMBLY ".