1993 Hyundai Excel GL, StandardFACTORY OEM SERVICE PROCEDURE

ECM Main Relay (SCOUPE)

  1. 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 .
  2. 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.
    Fig 1: Checking ECM Main Relay (Scoupe)
    G93C80327Courtesy of HYUNDAI MOTOR CO.
  3. 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.
  4. 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.

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