2000 Saturn LS2 AutomaticFACTORY OEM SERVICE PROCEDURE

Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) system check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD system check, go to next step.
  2. Turn ignition on, with engine off. Using scan tool, command EVAP purge solenoid on. If solenoid clicks when commanded on, problem is intermittent. See DIAGNOSTIC AIDS . If solenoid does not click when commanded on, go to next step.
  3. Disconnect EVAP purge solenoid harness connector. Connect a test light between solenoid harness 2-pin connector terminals. Using scan tool, command EVAP purge solenoid on. If test light turns on, replace EVAP purge solenoid. If test light does not turn on, go to next step.
    4. NOTE: A voltage reading of 2-4 volts in this circuit is normal.
  4. Check for short to voltage in Dark Green wire between solenoid and ECM. Repair as necessary. If circuit is okay, replace ECM.
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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