Encoder Circuit Check

CHECK ENCODER SIGNAL

Turn ignition switch ON.

Check the signal between rear power window control unit LH connector D209 terminal 4 and ground with oscilloscope.

Fig 1: Checking Signal Between Rear Power Window Control Unit LH Connector D209 Terminal 4 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.NISSAN MOTOR CO., U.S.A.

TERMINAL SIGNAL CHART

Connector	Terminals		Condition	Signal
Connector	(+)	(-)	Condition	Signal
D209	4	Ground	Opening	Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal?

YES: GO TO 2

No: Replace rear power window control unit LH.

CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear power window control unit LH and rear power window motor LH.
3. Check continuity between rear power window control unit LH or RH connector D209 terminal 4 and rear power window motor LH connector D204 terminal 3.
  4 - 3: Continuity should exist.
  
  Is the inspection result normal?
  
  YES: GO TO 3
  
  No: Repair or replace harness.
  
  Fig 2: Checking Continuity Between Rear Power Window Control Unit And Motor LH Or RH Connector Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK REAR POWER WINDOW MOTOR LH POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect rear power window motor LH or RH.
3. Turn ignition switch ON.
4. Check voltage between rear power window motor LH connector D204 terminal 4 and ground.
  4 - Ground: Approx. 10V
  
  Is the inspection result normal?
  
  YES: GO TO 5
  
  No: GO TO 4
  
  Fig 3: Checking Voltage Between Rear Power Window Motor Connector Terminal 4 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear power window motor LH and rear power window control unit LH.
3. Check continuity between rear power window motor LH connector D204 (B) terminal 4 and rear power window control unit LH connector D209 (A) terminal 5.
  4 - 5: Continuity should exist.
  
  Is the inspection result normal?
  
  YES: Replace rear power window switch LH. Refer to "REMOVAL AND INSTALLATION ".
  
  No: Repair or replace harness.
  
  Fig 4: Identifying Continuity Between Rear Power Window Motor LH Connector And Rear Power Window Control Unit LH Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK ENCODER GROUND
1. Disconnect rear power window motor LH.
2. Check continuity between rear power window motor LH connector D204 terminal 6 and ground.
  6 - Ground: Continuity should exist.
  
  Is the inspection result normal?
  
  YES: GO TO 7
  
  No: GO TO 6
  
  Fig 5: Checking Continuity Between Rear Power Window Motor LH Connector D204 Terminal 6 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK ENCODER GROUND CIRCUIT
1. Disconnect rear power window control unit LH.
2. Check continuity between rear power window motor LH connector D204 terminal 6 and rear power window control unit LH connector D209 terminal 3.
  6 - 3: Continuity should exist.
  
  Is the inspection result normal?
  
  YES: Replace rear power window control unit LH.
  
  No: Repair or replace harness.
  
  Fig 6: Identifying Continuity Between Rear Power Window Motor LH Connector And Rear Power Window Control Unit LH Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.

CHECK REAR POWER WINDOW MOTOR LH LIMIT SWITCH SIGNAL

Turn ignition switch ON.

Check voltage between rear power window control unit LH connector and ground.

CONNECTOR TERMINAL VOLTAGE CHART

Connector	Terminals		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
D209	3	Ground	Rear power window LH is between fully-open and just before fully-closed position (ON)	0
D209	3	Ground	Rear power window LH is between just before fully-closed position and fully-closed position (OFF)	5

Fig 7: Checking Voltage Between Rear Power WindowControl Unit LH Connector Terminal 3 And Ground

Courtesy of NISSAN MOTOR CO., U.S.A.

Is the inspection result normal?

YES: Limit switch circuit is OK.

No: GO TO 8

CHECK REAR POWER WINDOW SWITCH LH OUTPUT SIGNAL
1. Turn ignition switch ON.
2. Check voltage between rear power window control unit LH harness connector D209 terminal 2 and ground.
  2 - Ground: Approx. 5V
  
  Is the inspection result normal?
  
  YES: GO TO 9
  
  No: Replace rear power window control unit LH.
  
  Fig 8: Identifying Voltage Between Rear Power Window Control Unit LH Harness Connector D209 Terminal 2 And Ground
  Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect rear power window control unit LH.
3. Check continuity between rear power window control unit LH connector D209 terminal 2 and rear power window motor LH connector D204 terminal 5.
  2 - 5: Continuity should exist.
  
  Is the inspection result normal?
  
  YES: Replace rear power window motor LH. Refer to "REMOVAL AND INSTALLATION ".
  
  No: Repair or replace harness.
  
  Fig 9: Identifying Continuity Between Rear Power Window Control Unit LH Connector And Rear Power Window Motor LH Connector
  Courtesy of NISSAN MOTOR CO., U.S.A.