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
Work Procedure
- PERFORM ECM RECOMMUNICATING FUNCTION
- Install ECM.
- Contact backside of the registered Intelligent Key* to push-button ignition switch while brake pedal is depressed, then ignition switch ON.
*: To perform this step, use the key that is used before performing ECM replacement.
- Maintain ignition switch in the ON position for at least 5 seconds.
- Ignition switch OFF.
- Check that the engine starts.
GO TO 2.
- PERFORM ADDITIONAL SERVICE WHEN REPLACING ECM
Perform additional service when replacing ECM. Refer to Work Procedure .
Inspection End
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
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.