4: Comparing PCM Data

After the Powertrain Control Module (PCM) values have been acquired, it is necessary to determine the fault area. Typically, it will require the comparison of the actual values from the vehicle to the typical values from the Diagnostic Reference Value Charts.

Example /30 MPH Readings:

NOTE: The charts apply to different vehicle applications (i.e., model, engine, transmission, etc.). Refer to the chart for an example.