Encoder Circuit Check (driver side)

CHECK FRONT POWER WINDOW MOTOR (DRIVER SIDE) CIRCUIT
1. Turn ignition switch ON.
2. Check voltage between front power window motor (driver side) connector D7 terminal 4 and ground.
  1. 4 (W) - Ground: Approx. 10V
OK or NG
1. OK: GO TO 3.
2. NG: GO TO 2.
Fig 1: Checking Voltage Between Front Power Window Motor (Driver Side) Connector D7 Terminal 4 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect driver door control unit (LCU01) and front power window motor (driver side) connector.
3. Check continuity between driver door control unit (LCU01) connector D8 terminal 4 and front power window motor (driver side) connector D7 terminal 4.
  1. 4 (W) - 4 (W): Continuity should exist.
OK or NG
1. OK: Replace driver door control unit (LCU01).
2. NG: Repair or replace harness.
Fig 2: Checking Harness Continuity
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK ENCODER GROUND
1. Turn ignition switch OFF.
2. Disconnect front power window motor (driver side) connector.
3. Check continuity between front power window motor (driver side) connector D7 terminal 6 and ground.
  1. 6 (B) - Ground: Continuity should exist.
OK or NG
1. OK: GO TO 4.
2. NG: Repair or replace harness.
Fig 3: Checking Continuity Between Front Power Window Motor (Driver Side) Connector D7 Terminal 6 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK ENCODER SIGNAL
1. Connect front power window motor (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: Terminal Condition Reference Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Signal Between Driver Door Control Unit (Lcu01) Connector And Ground With Oscilloscope
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Encoder function is OK.
2. NG: GO TO 5
CHECK ENCODER CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect driver door control unit and front power window motor (driver side) connector.
3. Check continuity between driver door control unit (LCU01) connector D8 terminal 1 and front power window motor (driver side) connector D7 terminal 3.
  1. 1 (G) - 3 (G): Continuity should exist.
OK or NG
1. OK: Replace front power window motor (driver side).
2. NG: Repair or replace harness.
Fig 6: Checking Encoder Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.