DDEC V SYSTEM LOSS OF VEHICLE CONTROL To avoid injury from the loss of vehicle control, do not use cruise control under these conditions: When it is not possible to keep the vehicle at a constant speed (on winding roads, in heavy traffic, in traffic that varies in speed, etc.). On slippery roads (wet pavement, ice-or snow-covered roads, loose gravel, etc.). Figure 5 Typical Cruise Control Switches Cruise Control may also be programmed to permit fast idle using the Cruise Control switches. With the engine at normal idle, transmission in neutral and service brakes on, turn on the Cruise Control On/Off Switch, and use the Resume Switch. The engine rpm should increase to a pre-defined speed.
The engine rpm can be raised or lowered from this point using the Set and Resume switches. NOTICE: When descending a hill with Cruise Control OFF, do not allow the engine to exceed 2,500 rpm under any conditions. Failure to observe this precaution can result in overspeeding and serious engine damage. It cannot limit vehicle speeds on down grades if available engine braking effort is exceeded, nor can it maintain speed on upgrades if power requirements exceed engine power capability. Cruise Control will maintain the set speed under normal road and load conditions. 24 All information subject to change without notice. DDC-SVC-MAN-0039 Copyright © 2009 DETROIT DIESEL CORPORATION