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 MANUALSHYUNDAI1990EXCEL BASE, 2D HATCHBACK, STANDARDREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMENGINE CONTROLS - SYSTEM/COMPONENT TESTSIDLE CONTROL SYSTEMISC MOTOR (1.5L & 2.4L)
1990 Hyundai Excel Base, 2D Hatchback, Standard
ISC Motor (1.5L & 2.4L)
1990 Hyundai Excel Base, 2D Hatchback, StandardSECTION ISC Motor (1.5L & 2.4L)
- Disconnect ISC motor connector. Check motor coil continuity between terminals No. 1 and 4. See Figure for terminal location. Resistance should be 5-35 ohms. If resistance is zero ohms or far more than specification, an open or short exists in motor coil. Replace ISC servo assembly.
- Connect 6 volts DC (four 1.5-volt DC batteries) between terminals No. 1 and No. 4 of ISC motor connector to operate ISC motor. DO NOT apply more than 6 volts. If motor does not operate, replace ISC motor assembly.
RENDER: 1.0x
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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.