Check Door Lock Actuator (Driver Side)

WARNING: This page is about a different car, the 2003 Infiniti M45. However, it is still accessible from the selected car via links, so may be relevant.

CHECK DOOR LOCK ACTUATOR HARNESS
1. Turn the ignition switch OFF.
2. Disconnect driver door control unit (LCU01) and front door lock actuator connector (driver side).
3. Check continuity between driver door control unit (LCU01) connector D8 terminals 12 (BR), 17 (SB) and front door lock actuator connector (driver side) D11 terminals 1 (SB), 3 (BR).
  1. 12 (BR) - 3 (BR) : Continuity should exist.
  2. 17 (SB) - 1 (SB) : Continuity should exist.
4. 1. 12 (BR) - Ground : Continuity should not exist.
  2. 17 (SB) - Ground : Continuity should not exist.
OK or NG

OK >> GO TO 2.

NG >> Repair or replace harness.

Fig 1: Checking Continuity Between Driver Door Control And Front Door Lock Actuator
Courtesy of NISSAN MOTOR CO., U.S.A.
CHECK OUTPUT SIGNAL
1. Connect driver door control unit (LCU01) connector.
2. Check voltage between driver door control unit (LCU01) connector D8 terminals 12 (BR), 17 (SB) and ground.
  
  Fig 2: Identifying Output Signal Table
  Courtesy of NISSAN MOTOR CO., U.S.A.
  
  Fig 3: Checking Output Signal System
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG

OK >> Replace front door lock actuator driver side.

NG >> Replace driver door control unit (LCU01).