Diagnostic Aids

Use freeze frame and/or failure records data to locate an intermittent condition. If DTC cannot be duplicated, information included in freeze frame and/or failure records data may help in determining number of miles since DTC stored. Fail counter and pass counter can also help in determining number of ignition cycles that diagnostic reported a pass and/or fail. Operate vehicle within same freeze frame conditions including those for RPM, for engine load, for vehicle speed, for temperature, and for others. This will isolate when DTC failed.