Enable Criteria

The term "enable criteria" is engineering language for the conditions necessary for a given diagnostic test to run. Each diagnostic has a specific list of conditions which must be met before the diagnostic will run. Enable criteria is another way of saying conditions required.

The enable criteria for each diagnostic are listed on the first page of the DTC description under the heading Conditions for Setting the DTC. The enable criteria vary with each diagnostic, and typically include, but are not limited to, the following items:
^ Engine speed (RPM)
^ Vehicle speed (VSS)
^ Engine coolant temperature (ECT)
^ Mass Air Flow (MAF)
^ Intake Air Temperature (IAT)
^ Throttle position (TP)
^ Barometric pressure (BARO)
^ High canister purge
^ Fuel-trim
^ Torque Converter Clutch (TCC) status