DTC Display Order

In the Diagnostic Mode, DTCs are displayed in numerical order. The first DTC displayed is always DTC 12, followed by any "Current" DTCs (21-25) or any "History" DTCs (31-35). "Remote Control Door Lock Transmitter Diagnostic DTCs" (41-45) will then be displayed if evoked while in the Diagnostic Mode. The last DTC displayed is "Begin Configuration Display" (55). The first number following DTC 55 is the hardware configuration, and the second number is the software configuration. DTC 55 and the two configuration numbers are always displayed. After the configuration numbers are displayed, the entire list is repeated beginning with DTC 12. System faults are stored as "Current", or "History" DTCs. A "Current" DTC means that the fault was present when the Diagnostic Mode was entered. A "History" DTC means the fault occurred sometime after the BCM was installed in the vehicle (or since the last time the DTCs were cleared), but may not currently be present. If a "Current" DTC is stored, the associated "History" DTC will always be stored. When working on systems controlled by the BCM, the technician should always refer to this Section and check for DTCs.