Powertrain Control Module (PCM) Reset

Description
All OBD II scan tools support the PCM reset. The 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 II system monitors or components have been tested to satisfy a drive cycle, without any other faults occurring.

The following events occur when a PCM reset is performed:
- Clears the number of DTCs.
- Clears the DTCs.
- Clears the freeze frame data.
- Clears diagnostic monitoring test results.
- Resets status of the OBD II system monitors.
- Sets DTC P1000.

NOTE: When using the NGS Tester to perform a PCM reset, press the CLEAR button. This function is performed only after retrieval of continuous DTCs.