Encoder Switch Check (Driver 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 (Driver Side) Power Supply
1. Turn ignition switch ON.
2. Check voltage between driver door control unit (LCU01) connector D8 terminal 4 and ground.
  
  Fig 1: Checking Front Power Window Regulator (Driver 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 driver door control unit (LCU01).
Check Harness Continuity
1. Turn ignition switch OFF.
2. Disconnect driver door control unit (LCU01) and front power window regulator (driver side) connector.
3. Check continuity between driver door control unit (LCU01) connector D8 terminal 4 and front power window regulator (driver side) connector D7 terminal 5.
  
  Fig 2: Checking Circuit 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 driver door control unit (LCU01) and front power window regulator (driver side).
Check Encoder Ground

Fig 3: Checking Encoder Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Check continuity between front power window regulator (driver side) connector D7 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.
Check Encoder Signal
1. Connect driver door control unit (LCU01) and front power window regulator (driver side) connector.
2. Turn ignition switch ON.
3. Check the signal between driver door control unit (LCU01) 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 driver door control unit (LCU01) and front power window regulator (driver side) connector.
3. Check continuity between driver door control unit (LCU01) connector D8 terminal 1 and front power window regulator (driver side) connector D7 terminal 6.
  
  Fig 6: Checking Encoder Circuit
  Courtesy of NISSAN MOTOR CO., U.S.A.
  1. 1 (G) - 6 (G): Continuity should exist.
4. Check continuity between driver door control unit (LCU01) connector D8 terminal 1 and ground.
  1. 1 (G) - Ground: Continuity should not exist.
OK or NG
1. OK: Replace front power window regulator (driver side)
2. NG: Repair or replace harness between driver door control unit (LCU01) and front power window regulator (driver side).