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Home >> Hyundai >> 2004 >> Elantra GLS, Automatic >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Fuel System >> General >> Basic Trouble Shooting >> ECM Problem Procedure

ECM Problem Procedure

  1. Turn ignition switch to OFF.
  2. Disconnect ECM connector, measure the resistance between ground terminal on the ECM side (terminal 1, 2) and chassis ground.
    Fig 1: Checking ECM Ground
    G00748400Courtesy of HYUNDAI MOTOR CO.
  3. Inspect connector connection and check terminal for poor connections, loose wires, bent or broken pins and corrosion.
  4. If it is abnormal, repair it. If it is normal, the ECM could be faulty.
  5. Temporarily install a good ECM and check for proper operation. If problem disappeared, replace ECM.
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