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Enabling Conditions To Run EVAP Leak Detection Test

  1. Cold start: with ambient temperature (obtained from modeling the inlet air temperature sensor on passenger vehicles and the battery temperature sensor on Jeep & truck vehicles) between 4°C (40°F) and 32°C (90°F) for 0.040 leak. Between 4°C (40°F) and 29°C (85°F) for 0.020 leak/
  2. Engine coolant temperature within: -12° to -8°C (10° to 18°F) of battery/ambient.
  3. Battery voltage between 10 and 15 volts.
    NOTE: If battery voltage drops below 10 volts for more than 5 seconds during engine cranking, the EVAP Leak Detection Test will not run.
  4. Low fuel warning light off (fuel level must be between 15% and 85%).
  5. MAP sensor reading 22 in Hg or above (This is the manifold absolute pressure, not vacuum).
  6. No engine stall during test.
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