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Home >> Pontiac >> 1997 >> Sunfire GT, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Basic Engine Testing - 2.4L >> On-Board Diagnostic (OBD) System Check >> Mil On Steady

Mil On Steady

  1. Perform On-Board Diagnostic (OBD) System Check. See ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK  . After performing OBD system check, go to next step.
  2. Turn ignition on with engine off. MIL should illuminate. If MIL does not illuminate, go to MIL INOPERATIVE  . If MIL illuminates, go to next step.
  3. Install scan tool. Using scan tool, command MIL on and off. If MIL turns on and off when commanded, go to step 8). If MIL does not turn on and off when commanded, go to next step.
  4. Turn ignition off. Disconnect PCM connectors. Turn ignition on. If MIL does not illuminate, go to step 7). If MIL illuminates, go to next step.
  5. Check for short to ground in MIL control circuit. See the WIRING DIAGRAMS article. Repair as necessary. After repairs, go to step 8). If circuit is okay, go to next step.
  6. Replace Instrument Panel Cluster (IPC). After IPC replacement, go to step 8).
  7. Replace PCM. Perform PCM relearn procedures. After repairs, go to next step.
  8. Using scan tool, clear DTCs. Attempt to start engine. If engine starts and runs, go to next step. If engine does not start, or starts and dies, go to step 1).
  9. Warm engine to operating temperature. Check for DTCs. If DTCs are present, go to the TESTS W/CODES article. If DTCs are not present, system is okay.
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