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 Fob Battery

WARNING: This page is about a different car, the 2004 Nissan Murano. However, it is still accessible from the selected car via links, so may be relevant.

CHECK KEY FOB BATTERY
1. Remove key fob battery. Refer to "KEY FOB BATTERY REPLACEMENT ".
2. Check voltage between battery positive and negative terminals, (+) and (-).
  Voltage: 2.5V - 3.0V
NOTE: Key fob does not function if battery is not set correctly.

OK or NG
1. OK: Key fob battery is OK.
2. NG: Replace key fob battery.
  
  Fig 1: Checking Voltage Between Battery Positive And Negative Terminals
  Courtesy of NISSAN MOTOR CO., U.S.A.

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.

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