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.
1995 Nissan-Datsun Sentra BaseFACTORY OEM SERVICE PROCEDURE
Start Signal System Test
- Locate ECM harness connector. ECM is located under center of instrument panel (connector is on driver's side). Turn ignition switch to START position. Measure voltage between ground and ECM harness connector terminal No. 20 (Black/Yellow wire). Battery voltage should be present in START position ONLY. Zero volts should be present in any other ignition switch position. If voltage is as specified, system is functioning properly.
- If voltage is not as specified, repair open harness or connectors between ignition switch, 7.5 amp fuse, and ECM sub-harness connector. If items are okay, check ECM terminals, harness and connectors for pushed-out, damaged, or corroded terminals. Repair or replace as necessary.
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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