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. 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.
   NOTE: The following values are approximate and vehicle specific. Use the values seen in pretest/monitor test screen on the DRBIII®. See TSB 25-02-98 for more detail.

A DTC will not set if a one-trip fault is set or if the MIL is illuminated for any of the following:

• Purge Solenoid
• All engine Controller Self Test Faults
• All Cam and/or Crank Sensor Faults
• MAP Sensor Faults
• Ambient/Battery Temperature Sensor Electrical Faults
• All Coolant Sensor Faults
• All TPS Faults
• LDP Pressure Switch Faults
• EGR Solenoid Electrical Faults
• All Injector Faults
• Baro Out Of Range
• Vehicle Speed Faults
• LDP Solenoid Circuit