Encoder Switch Check (Passenger Side)

WARNING: This page is about a different car, the 2004 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

CHECK FRONT POWER WINDOW REGULATOR (PASSENGER SIDE) POWER SUPPLY
1. Turn ignition switch ON.
2. Check voltage between passenger door control unit connector D38 terminal 4 and ground.
  
  Fig 1: Checking Front Power Window Regulator (Passenger Side) Power Supply
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. 4 (W) - Ground: Approx. 10V
OK or NG
1. OK: Go to 2.
2. NG: Replace passenger door control unit.
Check Harness Continuity
1. Turn ignition switch OFF.
2. Disconnect passenger door control unit and front power window regulator (passenger side) connector.
3. Check continuity between driver door control unit (LCU01) connector D38 terminal 4 and front power window regulator (passenger side) connector D37 terminal 5.
  
  Fig 2: Checking Harness For Continuity
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. 4 (W) - 5 (W): Continuity should exist.
OK or NG
1. OK: Go to 3.
2. NG: Repair or replace harness between passenger door control unit and front power window regulator (passenger side).
Check Encoder Ground
Check continuity between front power window regulator (passenger side) connector D37 terminal 3 and ground.
1. 3 (B) - Ground: Continuity should exist.
OK or NG
1. OK: Go to 4.
2. NG: Repair or replace harness.
Fig 3: Checking Encoder Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
Check Encoder Signal
1. Connect passenger door control unit and front power window regulator (passenger side) connector.
2. Turn ignition switch ON.
3. Check the signal between passenger door control unit connector and ground with oscilloscope.
  
  Fig 4: Terminals & Connector Condition Signal Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Encoder Signal
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Encoder switch circuit is OK.
2. NG: Go to 5.
Check Encoder Circuit
1. Turn ignition switch OFF.
2. Disconnect passenger door control unit and front power window regulator (passenger side) connector.
3. Check continuity between passenger door control unit connector D38 terminal 12 and front power window regulator (passenger side) connector D37 terminal 6.
  1. 12 (G) - 6 (G): Continuity should exist.
4. Check continuity between passenger door control unit connector D38 terminal 12 and ground.
  
  Fig 6: Testing Encoder Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. 12 (G) - Ground: Continuity should not exist.
OK or NG
1. OK: Replace front power window regulator (passenger side)
2. NG: Repair or replace harness between passenger door control unit and front power window regulator (passenger side).