Encoder Circuit Check (rear LH or RH)

CHECK REAR POWER WINDOW MOTOR CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect rear power window motor LH or RH connector.
3. Turn ignition switch ON.
4. Check voltage between rear power window motor LH or RH connector D57(LH) or D77(RH) terminal 6 and ground.
  1. 6 (W) - Ground: Approx. 10V
OK or NG
1. OK: GO TO 3.
2. NG: GO TO 2.
Fig 1: Checking Voltage Between Rear Power Window Motor LH Or RH Connector D57(LH) Or D77(Rh) Terminal 6 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear door control unit LH or RH and rear power window motor LH or RH connector.
3. Check continuity between rear door control unit LH or RH connector D58(LH) or D78(RH) terminal 15 and rear power window motor LH or RH connector D57(LH) or D77(RH) terminal 6.
  1. 15 (W) - 6 (W): Continuity should exist.
OK or NG
1. OK: Replace rear door control unit LH or RH.
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 rear power window motor LH or RH connector.
3. Check continuity between rear power window motor LH or RH connector D57(LH) or D77(RH) terminal 4 and ground.
  1. 4 (B) - Ground: Continuity should exist.
OK or NG
1. OK: GO TO 4.
2. NG: Repair or replace harness.
Fig 3: Checking Continuity Between Rear Power Window Motor LH Or RH Connector D57(LH) Or D77(RH) Terminal 4 And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK ENCODER SIGNAL
1. Connect rear power window motor LH or RH connector.
2. Turn ignition switch ON.
3. Check the signal between rear door control unit LH or RH connector and ground with oscilloscope.
  
  Fig 4: Terminal Condition Reference Chart
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 5: Checking Signal Between Rear Door Control Unit LH Or RH 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 rear door control unit LH or RH and rear power window motor LH or RH connector.
3. Check continuity between rear door control unit LH or RH connector D58(LH) or D78(RH) terminal 19 and rear power window motor LH or RH connector D57(LH) or D77(RH) terminal 5.
  1. 19 (G) - 5 (G): Continuity should exist.
OK or NG
1. OK: Replace rear power window motor LH or RH.
2. NG: Repair or replace harness.
Fig 6: Checking Encoder Circuit
Courtesy of NISSAN MOTOR CO., U.S.A.