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

Check Key Switch

WARNING: This page is about a different car, the 2005 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY SWITCH INPUT SIGNAL
With CONSULT-II

Check ignition key switch "KEY ON SW" in "DATA MONITOR" mode with CONSULT-II.
- When key is inserted in ignition key cylinder
  KEY ON SW: ON
- When key is removed from ignition key cylinder
  KEY ON SW: OFF
  
  Fig 1: CONSULT-II Data Monitor Display
  Courtesy of NISSAN MOTOR CO., U.S.A.
Without CONSULT-II

Check voltage between BCM connector and ground.

Fig 2: BCM Connector And Ground Voltage Table
Courtesy of NISSAN MOTOR CO., U.S.A.

Chapter Navigation

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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.