Test Description

The number below refers to the step number on the diagnostic procedures.

1. 1
   
   The Diagnostic System Check - Engine Controls prompts the technician to complete some basic checks and store the freeze frame data on the scan tool if applicable. This creates an electronic copy of the data taken when the fault occurred. The information is then stored in the scan tool for later reference.
2. 2
   
   Disconnecting PCM will determine whether the malfunction is caused by a short to ground in the MIL control circuit or a faulty PCM.