MIL Lamp Strategy: Notes

I/M Readiness OK to test = Key On Engine OFF 

• MIL Lamp will remain on until the engine is started or Ignition is turned off.

  I/M not ready for testing = Key On Engine OFF 

• MIL Lamp on solid for (15) seconds then MIL Lamp will flash on/off for (5) seconds then it will remain on until the vehicle is started or the Ignition is turned off.
  Fig 1: MIL Lamp Strategy

  Courtesy of DAIMLERCHRYSLER CORP.