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 WDS or equivalent tester to perform a PCM reset, press the CLEAR button. This function is performed only after retrieval of continuous DTCs.