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
With GST
WARNING: This page is about a different car, the 2004 Nissan Quest. However, it is still accessible from the selected car via links, so may be relevant.
- Turn ignition switch ON and select MODE 1 with GST.
- Check that engine coolant temperature is within the range of -10 to 50°C (14 to 122°F).
- Check that voltage between ECM terminal 54 (EGR temperature sensor signal) and ground is less than 4.8V.
- Start engine and let it idle for at least 80 seconds.
- Stop engine.
- Perform steps 1 to 4 again.
- Select MODE 3 with GST.
- If DTC is detected, go to DIAGNOSTIC PROCEDURE
.
- When using GST, DTC Confirmation Procedure should be performed twice as much as when using CONSULT-II because GST cannot display MODE 7 (1st trip DTC) concerning this diagnosis. Therefore, using CONSULT-II is recommended.
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.