Typical Enabling Conditions

EVAP key-off monitor runs when all of following conditions met


Atmospheric pressure

70 to 110 kPa (525 to 825 mmHg)

Battery voltage

10.5 V or higher

Vehicle speed

4 km/h (2.5 mph) or less

Ignition switch


EVAP control system pressure sensor

Not detected

Purge VSV

Not operated by scan tool

Vent valve

Not operated by scan tool

Leak detection pump

Not operated by scan tool

Both of the following conditions 1 and 2 are met before key off


1. Duration that vehicle has been driven

5 minutes or more

2. EVAP purge operation



4.4 to 35°C (40 to 95°F)


4.4 to 35° C (40 to 95° F)

DIY Battery Repair

DIY Battery Repair

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