EVAP Leak Detection Test Enabling Conditions
- Cold start with ambient temperature (obtained from modeling the inlet air temperature sensor) between 40°F (4°C) and 90°F (32°C) for 0.040" leak. Between 40°F (4°C) and 85°F (29°) for 0.020" leak.
- Engine coolant temperature is within 10 to 18° F (-8 to -12°C) of ambient.
- Battery voltage is between 10 and 15 volts.
- Low fuel warning light off (fuel level must be between 15 and 85 percent.
- MAP sensor reading is 22 in. Hg or above. This is the manifold absolute pressure, not vacuum.
- No engine stall during test.
NOTE:
If battery voltage drops below 10 volts for more than 5 seconds during engine cranking, the EVAP leak detection test will not run.
A DTC will not be set is a one trip fault is set or is the MIL is illuminated for any of the following:
- Purge Solenoid Electrical Fault
- All TP Sensor Faults
- All Engine Controller Self-Test Faults
- LDP Pressure Switch Fault
- All Camshaft and/or Crankshaft Sensor Fault
- EGR Solenoid Electrical Fault
- All MAP Sensor Faults
- All Injector Faults
- Ambient Temperature Sensor Electrical Faults
- BARO Out of Range
- Vehicle Speed Faults
- All Coolant Sensor Faults
- LDP Solenoid Circuit
NOTE:
If battery temperature is not within range, or if the engine coolant temperature is not within a specified range of the battery temperature, the PCM will not run tests for DTC P1494, P1486, P0442, P0455 or P0441. These temperature calibrations may be different between models.