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 MANUALSHYUNDAI1994SCOUPE LS, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSRELAYSMPI CONTROL RELAY (SCOUPE)
1994 Hyundai Scoupe LS, Automatic
MPI Control Relay (SCOUPE)
1994 Hyundai Scoupe LS, AutomaticSECTION MPI Control Relay (SCOUPE)
- Relay is located behind driver's dash panel, near ECM. Disconnect harness connector. Removal of relay may assist in testing. Apply battery voltage to terminal No. 4 (positive) and ground terminal No. 2 (negative). See Fig 1 .
- Using a DVOM, check for continuity between terminal No. 1 and terminal No. 5. Continuity should exist. Check for continuity between terminal No. 5 and terminal No. 3. Replace relay if continuity does not exist.
- Disconnect relay harness connector. Using DVOM, measure voltage between relay harness connector terminals No. 4 and 5 (White/Blue wires) and vehicle ground. If battery voltage is not present, inspect and repair circuit.
- Ensure ignition is off. Disconnect ECM harness connector. Connect jumper wire between ECM harness connector terminal No. 36 and vehicle ground. See Figure . Using ohmmeter, check resistance between relay harness connector terminal No. 2 (Black/Green wire) and vehicle ground. If continuity does not exist, inspect and repair circuit as needed.
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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.