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.
2008 Nissan-Datsun Sentra SE-RFACTORY OEM SERVICE PROCEDURE
Engine Control System - Introduction (Qr25DE)
- Index For DTC
- Precautions
- Preparation
- Engine Control System
- System Diagram
- Multiport Fuel Injection (MFI) System
- Electronic Ignition (EI) System
- Fuel Cut Control (at No Load and High Engine Speed)
- Air Conditioning Cut Control
- Automatic Speed Control Device (ASCD)
- Can Communication
- Evaporative Emission System
- On Board Refueling Vapor Recovery (ORVR)
- Positive Crankcase Ventilation
- NVIS (NISSAN Vehicle Immobilizer System-NATS)
- On Board Diagnostic (OBD) System
- Introduction
- Two Trip Detection Logic
- Emission-related Diagnostic Information
- Emission-Related Diagnostic Information Items
- DTC And 1ST Trip DTC
- Freeze Frame Data And 1ST Trip Freeze Frame Data
- System Readiness Test (SRT) Code
- Test Value And Test Limit (GST Only - Not Applicable To Consult-III)
- How To Erase Emission-Related Diagnostic Information
- Malfunction Indicator Lamp (MIL)
- OBD System Operation Chart
- Relationship Between Mil, 1ST Trip DTC, DTC And Detectable Items
- Summary Chart
- Relationship Between Mil, DTC, 1ST Trip DTC And Driving Patterns For "Misfire < Exhaust Quality Deterioration >", "Fuel Injection System"
- Explanation For Driving Patterns For "Misfire < Exhaust Quality Deterioration >", "Fuel Injection System"
- Relationship Between Mil, DTC, 1ST Trip DTC And Driving Patterns Except For "Misfire < Exhaust Quality Deterioration >", "Fuel Injection System"
- Explanation For Driving Patterns Except For "Misfire < Exhaust Quality Deterioration >", "Fuel Injection System"
- Basic Service Procedure
- Trouble Diagnosis
- Trouble Diagnosis Introduction
- DTC Inspection Priority Chart
- Symptom Matrix Chart
- Engine Control Component Parts Location
- Vacuum Hose Drawing
- Circuit Diagram
- ECM Harness Connector Terminal Layout
- ECM Terminals and Reference Value
- CONSULT-III Function (ENGINE)
- Generic Scan Tool (GST) Function
- CONSULT-III Reference Value in Data Monitor Mode
- Trouble Diagnosis - Specification Value
- Trouble Diagnosis For Intermittent Incident
- Power Supply And Ground Circuit
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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