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.
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HOMESERVICE MANUALSNISSAN-DATSUN2009SENTRA L4-2.0L (MR20DE)REPAIR AND DIAGNOSISBODY AND FRAMELOCKSKEYLESS ENTRYKEYLESS ENTRY TRANSMITTERKEYLESS ENTRY TRANSMITTER BATTERYSERVICE AND REPAIRINTELLIGENT KEY BATTERY REPLACEMENT
2009 Nissan-Datsun Sentra L4-2.0L (MR20DE)
Intelligent Key Battery Replacement
2009 Nissan-Datsun Sentra L4-2.0L (MR20DE)SECTION Intelligent Key Battery Replacement
INTELLIGENT KEY SYSTEM
Intelligent Key Battery Replacement
INTELLIGENT KEY BATTERY INSPECTION
1. Remove battery to measure voltage across battery positive (+) and negative (-) terminals.
2. Check by connecting a resistance (approximately 300Ohm(s)) so that the current value becomes about 10 mA.
Standard : Approx. 2.5 - 3.0V
NOTE:
Key fob does not function if battery is not installed correctly.
RENDER: 1.0x
NO RELATED
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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.