Door Mirror Defogger Power Supply Circuit Check (Without Auto Dimming Outside Mirrors)

WARNING: This page is about a different car, the 2004 Nissan Maxima. 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.

FUSES REFERENCE

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.
OK or NG
- OK: GO TO 3.
- NG: Repair or replace harness.
  
  Fig 2: Checking Voltage Between Fuse Block (J/B) Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DOOR MIRROR DEFOGGER POWER SUPPLY 2
Check voltage between fuse block (J/B) connector and ground.

Fig 3: 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).
  
  Fig 4: Checking Voltage Between Fuse Block (J/B) Connector And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
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 D4 (LH) or D107 (RH) terminal 2.
  5N (L/B) - 2 (L/B): Continuity should exist.
OK or NG
- OK: GO TO 5.
- NG: Repair or replace harness.
  
  Fig 5: Checking Continuity Between Fuse Block (J/B) Connector M3 Terminal 5N And Door Mirror Connector D4 (LH) Or D107 (RH) Terminal 2
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK DOOR MIRROR DEFOGGER GROUND CIRCUIT
Check continuity between each door mirror connector D4 (LH) or D107 (RH) terminal 1 and ground.

1 (B) - Ground: Continuity should exist.

OK or NG
- OK: GO TO 6.
- NG: Repair or replace harness.
  
  Fig 6: Checking Continuity Between Door Mirror Connector D4 (LH) Or D107 (RH) Terminal 1 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 D4 (LH), D107 (RH) terminals 1 and 2.
  2 (L/B) - 1 (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 ".
  
  Fig 7: Checking Continuity Between Door Mirror Connector D4 (LH), D107 (RH) Terminals 1 And 2
  Courtesy of NISSAN MOTOR CO., U.S.A.