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Home >> Chevrolet >> 2002 >> Monte Carlo LS >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Self-Diagnostics - 3.4L >> System Tests >> Mil On Steady >> Diagnostic Procedures

Diagnostic Procedures

  1. Did you perform the Diagnostic System Check - Engine Controls? If yes, go to next step. If no, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM.
  2. With a scan tool observe the DTCs. Are any DTCs set? If yes, go to DIAGNOSTIC TROUBLE CODE DEFINITIONS . If yes, go to next step.
  3. Turn ignition off. Observe the MIL on the Instrument Panel (IP) cluster. Is MIL ON? If yes, go to step  7. If no, go to next step.
  4. Install a scan tool. Command MIL ON and OFF several times while monitoring the IP cluster. Does the MIL turn ON and OFF when commanded? If yes, see DIAGNOSTIC AIDS . If no, go to step  6.
  5. Repair MIL control circuit for a short to ground. After repairs, go to step  7.
  6. Repair MIL control circuit for a short to voltage. After repairs, go to next step.
  7. Install a scan tool. Command MIL ON and OFF several times while monitoring the IP cluster. Does the MIL turn OFF when commanded? If yes, go to DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. If no, go to step  2.
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