The DDEC V ECU receives electronic inputs from sensors on the engine and vehicle, and uses the information to control engine operation. It computes fuel timing and fuel quantity based upon predetermined calibration tables in its memory. DDEC V provides an indication of engine and vehicle malfunctions. The ECU continually monitors the DDEC V system. See Figure 7.
Any faults that occur are stored as codes in the ECU’s memory. A DDDL® can be used to read the codes.