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.
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HOMESERVICE MANUALSINFINITI1992M30 2D CONVERTIBLEREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSFUEL SYSTEMFUEL CONTROLNOTES
1992 Infiniti M30 2D Convertible
Fuel Control: Notes
1992 Infiniti M30 2D ConvertibleSECTION Notes
ECU controls fuel system based upon sensor input signals. See FUEL CONTROL SYSTEM INPUT SIGNALS table. If feedback system does not function properly, check input signals before replacing ECU.
FUEL CONTROL SYSTEM INPUT SIGNALS
| Application | Model Usage | ||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| A/C Clutch Signal | G20 & (1) Q45 | ||||||||||||||
| Airflow Meter | G20, M30 & Q45 | ||||||||||||||
| Battery Voltage | G20, M30 & Q45 | ||||||||||||||
| Crank Angle Sensor | G20, M30 & Q45 | ||||||||||||||
| Engine (Coolant) Temperature | G20 M30 & Q45 | ||||||||||||||
| Exhaust Gas Temperature Sensor (2) | G20, M30 & Q45 | ||||||||||||||
| Fuel Temperature Sensor | M30 & Q45 | ||||||||||||||
| Ignition (START) Switch | G20 M30 & Q45 | ||||||||||||||
| Neutral Switch | (3) G20 | ||||||||||||||
| Oxygen Sensor | G20, M30 & (4) Q45 | ||||||||||||||
| Park/Neutral (Inhibitor) Switch | G20, (5) M30 & (6) Q45 | ||||||||||||||
| Power Steering Pressure Switch | G20 & Q45 | ||||||||||||||
| Secondary Throttle Sensor | (7) Q45 | ||||||||||||||
| Sub-Crank Angle Sensor | Q45 | ||||||||||||||
| Throttle Position Sensor | G20, M30 & Q45 | ||||||||||||||
| Throttle (Idle) Switch | M30 & Q45 | ||||||||||||||
| Vehicle Speed Sensor | G20, M30 & Q45 | ||||||||||||||
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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.