Power Supply And Ground Circuit Inspection

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
Make sure none of the following fuses or fusible link for the driver seat control unit and automatic drive positioner control unit are blown.

Fig 1: Fuses Reference Chart
Courtesy of NISSAN MOTOR CO., U.S.A.

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 POWER SUPPLY CIRCUIT (DRIVER SEAT CONTROL UNIT)
1. Disconnect driver seat control unit.
2. Check voltage between driver seat control unit and ground.
  
  Fig 2: Terminals Voltage Reference Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Voltage Between Driver Seat Control Unit And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
- OK: GO TO 3.
- NG: Check harness for open and short between driver seat control unit and fuse block (J/B).
CHECK GROUND CIRCUIT (DRIVER SEAT CONTROL UNIT)
1. Turn ignition switch OFF.
2. Check continuity between the driver seat control unit connector P2 terminal 32, P3 terminal 48 and ground.
  32 (B/W) - Ground: Continuity should exist.
  
  48 (BR) - Ground: Continuity should exist.
OK or NG
- OK: Driver seat control unit circuit check is ON, GO TO 4.
- NG: Repair or replace harness between driver seat control unit and ground.
  
  Fig 4: Checking Continuity Between Driver Seat Control Unit Connector P2 Terminal 32, P3 Terminal 48 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK POWER SUPPLY CIRCUIT (AUTOMATIC DRIVE POSITIONER CONTROL UNIT)
1. Disconnect automatic drive positioner control unit.
2. Check voltage between automatic drive positioner control unit connector M42 terminal 34(Y/R), 39 (W/R) and ground.
  34 (W) - Ground: Battery voltage
  
  39 (W/R) - Ground: Battery voltage
OK or NG
- OK: GO TO 5.
- NG: Repair or replace harness.
  
  Fig 5: Checking Voltage Between Automatic Drive Positioner Control Unit Connector M42 Terminal 34, 39 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK GROUND CIRCUIT (AUTOMATIC DRIVE POSITIONER CONTROL UNIT)
Check continuity between the automatic drive positioner control unit connector M42 terminal 40 (B), 48 (B) and ground.

40 (B) - Ground: Continuity should exist.

48 (B) - Ground: Continuity should exist.

OK or NG
- OK: Automatic drive positioner control unit circuit is OK.
- NG: Repair or replace harness.
  
  Fig 6: Checking Continuity Between Automatic Drive Positioner Control Unit Connector M42 Terminal 40, 48 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.