Check Power Supply And Ground

WARNING: This page is about a different car, the 2005 Infiniti FX45 and 2005 Infiniti FX35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FUSE
Check if any of the following fuses in the BCM are blown.
- Check 50A fusible link (letter M , located in the fuse and fusible link box.)
- Check 15A fuse [No.22, located in the fuse block (J/B)]
- Check 10A fuse [No.1, located in the fuse block (J/B)]
- Check 10A fuse [No.6, located in the fuse block (J/B)]
NOTE: Refer to "COMPONENT PARTS AND HARNESS CONNECTOR LOCATION ".

OK or NG
1. OK : GO TO 2.
2. NG : If fuse is blown out, be sure to eliminate cause of malfunction before installing new fuse. Refer to "COMPONENT PARTS AND HARNESS CONNECTOR LOCATION ".
CHECK POWER SUPPLY CIRCUIT (BCM)
1. Turn ignition switch OFF.
2. Disconnect BCM connector.
3. Check voltage between BCM connector and ground.
  
  Fig 1: Voltage Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : GO TO 3.
2. NG : Check harness for open and short between BCM and fuse or fusible link.
Fig 2: Checking Voltage Between BCM Connector And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK GROUND CIRCUIT (BCM)
1. Turn ignition switch OFF.
2. Check continuity between BCM connector B14 terminal 49, 52 and ground.
  1. 49 (B) - Ground : Continuity should exist.
  2. 52 (B) - Ground : Continuity should exist.
OK or NG
1. OK : BCM circuit is OK. Check the driver seat control unit. GO TO 4.
2. NG : Repair or replace the harness between BCM and ground.
Fig 3: Checking Continuity Between BCM Connector B14 Terminal 49, 52 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK FUSE
- Check 10A fuse [No.9, located in fuse block (J/B)].
NOTE: Refer to "COMPONENT PARTS AND HARNESS CONNECTOR LOCATION ".

OK or NG
1. OK : GO TO 5.
2. NG : If fuse is blown out, 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 connector.
2. Check voltage between driver seat control unit and ground.
  
  Fig 4: Voltage Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : GO TO 6.
2. NG : Repair or replace harness between driver seat control unit and fuse block (J/B).
Fig 5: Checking Voltage Between Driver Seat Control Unit And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK GROUND CIRCUIT (DRIVER SEAT CONTROL UNIT)
1. Turn ignition switch OFF.
2. Check continuity between the driver seat control unit connector B152, B153 terminal 16A, 61E and ground.
  1. 16A (B) - Ground : Continuity should exist.
  2. 61E (B/Y) - Ground : Continuity should exist.
OK or NG
1. OK : GO TO 7.
2. NG : Repair or replace harness between driver seat control unit and ground.
Fig 6: Checking Continuity Between B152, B153 Terminal 16A, 61E 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 connector.
2. Check voltage between automatic drive positioner control unit and ground.
  
  Fig 7: Voltage Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK : GO TO 8.
2. NG : Repair or replace harness between automatic drive positioner control unit and fuse block (J/B).
Fig 8: Checking Voltage Between Automatic Drive Positioner Control Unit 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 M50 terminal 40, 48 and ground.
1. 40 (B) - Ground : Continuity should exist.
2. 48 (B) - Ground : Continuity should exist.
OK or NG
1. OK : Driver seat control unit circuit is OK.
2. NG : Repair or replace harness between automatic drive positioner control unit and ground.
Fig 9: Checking Continuity Between Terminal 40, 48 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.