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.
2003 Nissan-Datsun Frontier Base, AutomaticFACTORY OEM SERVICE PROCEDURE
DTC Confirmation Test (Using Generic Scan Tool)
- Turn ignition on. Select MODE 1 with scan tool. Ensure engine coolant temperature is 14-95°F (-10-60°C).
- Measure voltage between ground and EGR temperature sensor circuit at ECM terminal No. 63 by backprobing. See Figure or Figure . See Figure . Ensure voltage is less than 4.8 volts.
- Start engine and let it idle for at least 60 seconds.
- Stop engine. Repeat steps 1 - 3 .
- Select MODE 3 with scan tool. If DTC is detected, go to DIAGNOSTIC PROCEDURE . If DTC is not detected, system is okay at this time.
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.