Powertrain Control Module (PCM) Reset: Description

The Powertrain Control Module (PCM) Reset allows the scan tool to command the PCM to clear all emission-related diagnostic information. When resetting the PCM, a DTC P1000 will be stored in the PCM until all the OBD system monitors or components have been tested to satisfy a drive cycle, without any other faults occurring. For more information about a drive cycle, refer to DRIVE CYCLES . Clearing DTCs from the vehicle-specific RETRIEVE/CLEAR CONTINUOUS MEMORY DTCs will clear all systems, including the OBD systems. Clearing DTCs from the OBD generic menu will only clear OBD features for the 6.0L diesel.

The following events occur when a PCM reset is performed:

• Clears the number of Diagnostic Trouble Codes (DTC).
• Clears the DTCs.
• Clears the freeze frame data.
• Resets status of the OBD system monitors.
• Sets DTC P1000 as a vehicle-specific DTC. P1000 will not appear as an OBD DTC.