A Door Control Module (DCM) DTC is read in only one of following two ways:

The DCMs has the ability to store DTCs as history codes only. Therefore, when a DTC is stored , the DCMs will display all DTCs as history even thought the malfunction is current. Always diagnose history DTCs the same way as current DTCs by performing the applicable DTC table. Most all information in diagnostic tables will refer to the scan tool for diagnostic support. For details on using the on-board diagnostic feature to access and/or clear DTCs Refer to On-Board Diagnostics .