2001 Saturn SC2 Automatic, MP6FACTORY OEM SERVICE PROCEDURE

Fuel Injector Coil Test

  1. Perform powertrain diagnostic system check. See appropriate POWERTRAIN DIAGNOSTIC SYSTEM CHECK in appropriate SELF-DIAGNOSTICS article.
  2. Using scan tool, check engine coolant temperature. If scan tool displays 50-90°F (10-32°C), go to next step. If scan tool does not display 50-90°F (10-32°C), go to step  4.
  3. Disconnect fuel injector connector. Using DVOM, measure resistance of each fuel injector. Resistance for all injectors should be 11-14 ohms. If resistance is not as specified, go to step  6. If resistance is as specified, see INJECTOR COIL TEST DIAGNOSTIC AIDS .
  4. Disconnect fuel injector multi-way connector. Using DVOM, measure resistance of each fuel injector. Record each fuel injector value. Subtract lowest resistance value from highest resistance value. If difference is equal to, or less than, 3 ohms, see INJECTOR COIL TEST DIAGNOSTIC AIDS . If resistance difference is not as specified, go to next step.
  5. Add all fuel injector resistance values, to obtain total resistance value. Divide total resistance value by number of fuel injectors, to obtain average resistance value. Subtract lowest and highest individual fuel injector resistance values from average resistance value. Replace fuel injector with greatest resistance difference, above or below average. Repair as necessary. After repairs, go to step  7.
  6. If resistance of fuel injector(s) is not 11-14 ohms, replace fuel injector(s). After repairs, go to next step.
  7. Operate system in order to verify repair. If system does not operate properly, go to step  2.
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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