Unlock Sensor Check

WARNING: This page is about a different car, the 2007 Nissan Versa. However, it is still accessible from the selected car via links, so may be relevant.

CHECK UNLOCK SENSOR INPUT SIGNAL

Check voltage between Intelligent Key unit connector and ground.

CONNECTOR TERMINAL VOLTAGE SPECIFICATIONS

Terminals			Front door lock (driver side) condition	Voltage (V) (Approx.)
(+)		(-)
Intelligent Key unit connector	Terminal	(-)
M52	28	Ground	Locked	5
M52	28	Ground	Unlocked	0

OK or NG

OK >> Unlock sensor circuit is OK.

NG >> GO TO 2.

Fig 1: Checking Unlock Sensor Input Signal

CHECK UNLOCK SENSOR CIRCUIT

Turn ignition switch OFF.
Disconnect Intelligent Key unit and front door lock actuator LH (door unlock sensor) connector.

Check continuity between Intelligent Key unit connector (A) terminal 28 and front door lock actuator LH (door unlock sensor) connector (B) terminal 4.

CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS

A		B		Continuity
Intelligent Key unit connector	Terminal	Front door lock actuator LH (door unlock sensor) connector	Terminal	Continuity
M52	28	D3	4	Yes

Check continuity between Intelligent Key unit connector and ground.

CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS

A		Ground	Continuity
Intelligent Key unit connector	Terminal
M52	28		No

Fig 2: Checking Unlock Sensor Circuit

OK or NG

OK >> GO TO 3.

NG >> Repair or replace harness between Intelligent Key unit and front door lock actuator LH (door unlock sensor).

CHECK UNLOCK SENSOR OPERATION

Check unlock sensor.

CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS

Terminal		Driver side door condition	Continuity
Unlock sensor		Driver side door condition	Continuity
4	5	Lock	No
4	5	Unlock	Yes

OK or NG

OK >> GO TO 4.

NG >> Replace unlock sensor.

Fig 3: Checking Unlock Sensor Operation

CHECK UNLOCK SENSOR GROUND CIRCUIT

Check continuity between front door lock actuator LH (door unlock sensor) connector and ground.

CONNECTOR TERMINAL CONTINUITY SPECIFICATIONS

Front door lock actuator LH (door unlock sensor) connector	Terminal	Ground	Continuity
D3	5	Ground	Yes

OK or NG

OK >> GO TO 5.

NG >> Repair or replace harness.

Fig 4: Checking Unlock Sensor Ground Circuit

CHECK INTELLIGENT KEY UNIT OUTPUT SIGNAL

Connect Intelligent Key unit harness connector.

Check voltage between Intelligent Key unit connector and ground.

CONNECTOR TERMINAL VOLTAGE SPECIFICATIONS

Terminals			Voltage (V) (Approx.)
(+)		(-)
Intelligent Key unit connector	Terminal	(-)
M52	28	Ground	5

OK or NG

OK >> Replace front door lock actuator LH (door unlock sensor). Refer to "REMOVAL AND INSTALLATION ".

NG >> Replace Intelligent Key unit. Refer to "REMOVAL AND INSTALLATION OF INTELLIGENT KEY UNIT ".

Fig 5: Checking Unlock Sensor Input Signal