1994 Hyundai Excel GL, StandardFACTORY OEM SERVICE PROCEDURE

ISC Motor Harness Inspection

  1. Check continuity of circuits between ISC motor and ECM. Ensure ignition is off. Disconnect ECM harness connector. Connect jumper wire between ECM harness connector terminal No. 23 (Blue/Yellow wire, 26-pin connector) and vehicle ground. See Figure .
  2. Using ohmmeter, check resistance between ISC motor harness connector terminal No. 1 (Red wire) and vehicle ground. If continuity does not exist, inspect and repair circuit as needed.
  3. Move jumper wire between ECM harness connector terminal No. 10 (Blue/White wire, 26-pin connector) and vehicle ground. Using ohmmeter, check resistance between ISC motor harness connector terminal No. 2 (Orange wire) and vehicle ground. If continuity does not exist, inspect and repair circuit as needed.
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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