Door Unlock Sensor Circuit Check

Turn ignition switch to LOCK position. Using a voltmeter, backprobe appropriate terminals at Smart Entrance Control Unit (SECU) harness connector with appropriate door lock in appropriate position. See DOOR UNLOCK INPUT VOLTAGE TEST table. See Figure . If voltage is not as specified, go to next step. If voltage is as specified, door unlock input signals are okay at this time.

DOOR UNLOCK INPUT VOLTAGE TEST

Door Position	Terminal No. (Wire Color)	Voltage
Driver's Door Lock
Unlocked	12 (Yellow/Green)	0
Locked	12 (Yellow/Green)	12
Passenger's Door Lock
Unlocked	13 (Yellow/Blue)	0
Locked	13 (Yellow/Blue)	12
All Other Door Locks
Unlocked	14 (Yellow/Red)	0
Locked	14 (Yellow/Red)	12

Disconnect malfunctioning door lock actuator harness connector. Check continuity between terminals No. 2 and 4 (terminals No. 3 and 4 on rear hatch) at door lock actuator connector (component side). See Fig 1 or Fig 2 . When door is locked, continuity should not exist. When door is unlocked, continuity should exist. If continuity is not as specified, replace door lock actuator. If continuity is as specified, check door unlock sensor ground and signal circuits for opens and/or shorts and repair as necessary. See WIRING DIAGRAMS .

Fig 1: Door Lock Actuator Connector Terminals Front & Rear

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

Fig 2: Door Lock Actuator Connector Terminals Back

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