Powertrain Control Module (PCM) Reset: Description
All OBDII 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. For more information about a drive cycle, See DRIVE CYCLES .
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 IDS or equivalent tester to perform a PCM reset, press the CLEAR button. This function is performed only after retrieval of continuous DTCs.