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.
1993 Nissan-Datsun Sentra SE-R, AutomaticFACTORY OEM SERVICE PROCEDURE
System Test (VE30DE)
- Start engine and bring to normal operating temperature. With engine running, measure voltage between ECM terminal No. 8 (Yellow/Black wire) and ground. With accelerator pedal released, battery voltage should be present. With accelerator pedal depressed, approximately zero volts should be present. If voltage is not as specified, go to next step. If voltage is as specified, system is functioning properly at this time.
- Turn ignition off. Disconnect and inspect power valve control solenoid harness connector. Repair connector as necessary. Turn ignition on. Measure voltage between solenoid harness connector Red/Black wire and ground. Battery voltage should be present. If battery voltage is present, turn ignition off and go to next step. If battery voltage is not present, repair harness or connectors as necessary.
- Disconnect and inspect ECM harness connector for pushed-out, bent, damaged or corroded terminals. Repair connector as necessary. Check continuity of Yellow/Black wire between ECM terminal No. 8 and solenoid harness connector. Continuity should exist. If continuity does not exist, repair harness or connectors as necessary. If continuity exists, check operation of power valve control solenoid. See CONTROL SOLENOID under POWER VALVE (MAXIMA) .
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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