DDEC VI SYSTEM Immediate Speed Reduction Pentium II computer with at least 256 MB of RAM. The immediate speed reduction option will bring engine rpm back to a predetermined speed, but will not shut down the engine. Once the malfunction has been corrected, the DDEC system will return the engine to normal operation. The engine should not be restarted after it has been shut down by the engine protection system, unless the problem has been located and corrected. The temperature of air in the intake system is increased with the addition of an EGR. DDEC is programmed to reduce fueling (power) for a short time to reduce air and coolant temperatures when necessary.
DDEC will store an information code that this event occurred, but no corrective action is required as this action is designed to maintain operation without a noticeable affect on vehicle performance. Red Stop Lamp The conditions that will cause the RSL (Stop Engine) to come on are: High coolant temperature Loss of coolant High oil temperature Flashing Malfunction Codes — All malfunction codes are four digits. The malfunction code recorded in the computer memory will remain until it is erased by a technician.
Low oil pressure Auxiliary shutdown Whenever the AWL (Check Engine) or the RSL (Stop Engine) come on, the DDEC computer will determine where the problem is and will then store this information in its memory. The flashing malfunction code can also be obtained by the operator. To support flashing codes, a Stop Engine Override/Diagnostic Request Switch must be configured and the AWL (Check Engine) and RSL (Stop Engine) must be hard-wired. The CPC cannot flash these lamps if they are not hard-wired. If the malfunction is intermittent, the lights will come on and go off as the computer senses the changing engine condition.
Diagnostic Tool The flashing code feature may be activated by satisfying one of the following conditions: The diagnostic tool for DDEC VI is DDDL 7.0. which requires at least a 48 All information subject to change without notice. (Rev. 04/08) DDC-SVC-MAN-0040 0704 Copyright © 2008 DETROIT DIESEL CORPORATION