Cinch Latch Motor System Inspection

WARNING: This page is about a different car, the 2006 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.

CINCH LATCH MOTOR SIGNAL INSPECTION

Turn ignition switch OFF.

While fully opening and closing the sliding door, check voltage waveform between sliding door latch control unit connector D204 (LH) or D304 (RH) terminals 3, 9 and ground using an oscilloscope.

TERMINALS VOLTAGE REFERENCE

3 - Ground
9 - Ground

Fig 1: Identifying Voltage Waveform Between Sliding Door Latch Control Unit Connector Terminals 3, 9 And Ground

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

OK or NG

OK: GO TO 2.

NG: Replace the sliding door latch control unit.

CINCH LATCH MOTOR CIRCUIT INSPECTION
1. Disconnect cinch latch switch and sliding door latch control unit.
2. Check continuity between cinch latch motor connector D203 (LH) or D303 (RH) terminals 1, 2 and sliding door latch control unit connector D204 (LH) or D304 (RH) terminals 3, 9.
  1 - 3: Continuity should exist.
  
  2 - 9: Continuity should exist.
OK or NG

OK: GO TO 3.

NG: Repair or replace harness.

Fig 2: Identifying Continuity Between Cinch Latch Motor Connector Terminals And Sliding Door Latch Control Unit Connector Terminals
Courtesy of NISSAN MOTOR CO., U.S.A.
CINCH LATCH MOTOR OPERATION INSPECTION
Connect battery power to terminals 1 and 2 on the cinch latch motor and check motor operation.

1 (+) - 2 (-): It operates.

1 (-) - 2 (+): It operates. (Reverse rotation)

OK or NG

OK: Motor is OK.

NG: Replace the cinch latch motor.

Fig 3: Connecting Battery Power To Terminals 1 And 2 On Cinch Latch Motor
Courtesy of NISSAN MOTOR CO., U.S.A.