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.
2021 Nissan-Datsun Sentra SRFACTORY OEM SERVICE PROCEDURE
Security Control System - Intelligent Key System
- Precautions
- Preparation
- System Description
- Component Location
- System
- Intelligent Key System/Engine Start Function
- System Description
- System Diagram
- Signal Transmission Function List
- System Description
- Precautions For Intelligent Key System
- Operation When Intelligent Key Is Carried
- Operation Range
- Engine Start Operation When Intelligent Key Is Contacted To Push-Button Ignition Switch
- Ignition Switch Position Change Table By Push-Button Ignition Switch Operation
- System Description
- NISSAN Anti-Theft System
- Vehicle Security System
- Intelligent Key System/Engine Start Function
- Diagnosis System (BCM)
- Diagnosis System (IPDM E/R)
- Diagnosis System (Intelligent Key Unit)
- Ecu Diagnosis Information
- Wiring Diagram
- Basic Inspection
- Symptom Diagnosis
- Intelligent Key System Symptoms
- Engine Can Not Start
- Engine Does Not Start When Intelligent Key Is Inside Of Vehicle
- Engine Does Not Start When Intelligent Key Is Inside Of Vehicle (One Key)
- Door Does Not Lock/Unlock And Engine Does Not Start (Req SW/Push SW) (One Key)
- Remote Engine Start Function Does Not Operate
- Removal And Installation
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
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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.