Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

2004 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE

Front LH Door Unlock Sensor Check

CHECK FRONT LH DOOR UNLOCK SENSOR INPUT SIGNAL
With CONSULT-II
1. Select "DATA MONITOR" mode in "INT LAMP" with CONSULT-II.
2. Check front LH door unlock sensor ("LOCK SIG DR") in "DATA MONITOR" mode.
Fig 1: Identifying Front LH Door Unlock Sensor Input Signal
Courtesy of NISSAN MOTOR CO., U.S.A.

Without CONSULT-II

Check voltage between smart entrance control unit harness connector terminal 36 and ground.

Fig 2: Identifying Voltage Between Smart Entrance Control Unit Harness Connector Terminal And Ground
Courtesy of NISSAN MOTOR CO., U.S.A.

Refer to "Figure ".

OK or NG
1. OK: Door unlock sensor is OK.
2. NG: GO TO 2.
CHECK FRONT LH DOOR UNLOCK SENSOR
1. Disconnect front LH door unlock sensor harness connector.
2. Check continuity between door unlock sensor terminals.
  
  Fig 3: Identifying Front LH Door Unlock Sensor
  Courtesy of NISSAN MOTOR CO., U.S.A.
OK or NG
1. OK: Check the following.
  - Door unlock sensor ground circuit
  - Harness for open or short between smart entrance control unit and door unlock sensor
2. NG: Replace door unlock sensor.

Factory Service Tools

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.