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 MANUALSMITSUBISHI1990PRECIS BASE, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTS - PFICOMPUTERIZED ENGINE CONTROLSCONTROL UNITPOWER CIRCUITS
1990 Mitsubishi Precis Base, Standard
Power Circuits
1990 Mitsubishi Precis Base, StandardSECTION Power Circuits
Turn ignition on. Check for battery voltage on ECU terminals No. 4 and 9. If battery voltage is not present, check operation of MPI control relay. See MPI CONTROL RELAY under RELAYS in this article.
ENGINE CONTROL UNIT (ECU) LOCATION
| Application | Location |
|---|---|
| Precis | Under Instrument Panel, Near Steering Column |
RENDER: 1.0x
NO RELATED
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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.