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Home >> Pontiac >> 2002 >> Aztek FWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls Self-Diagnostics >> System Tests >> Malfunction Indicator Lamp Always On >> Diagnostic Procedures
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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, see DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no, go to next step.
  3. Turn OFF the ignition. Observe the MIL on the Instrument Panel (IP) cluster. Is the MIL ON? If yes, go to step  6. If no, go to next step.
  4. Install a scan tool. Command the 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 next step.
  5. Test the MIL control circuit for a short to ground. Repair as necessary. After repairs, go to step  7.
  6. Test the MIL control circuit for a short to voltage. Repair as necessary. After repairs, go to next step.
  7. Install a scan tool. Command the MIL ON and OFF several times while monitoring the IP cluster. Does the MIL turn OFF when commanded? If yes, see DIAGNOSTIC SYSTEM CHECK - ENGINE CONTROLS  under SELF-DIAGNOSTIC SYSTEM. If no, go to step  2.
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