GHG17 DD Medium Duty Operators Manual Aftertreatment System Driver Notifications and Actions Aftertreatment System Driver Notifications and Actions High Exhaust System Temperature Lamp Table 14. Malfunction Indicator Lamp Table 15. Diesel Particulate Filter Regeneration Lamp All information subject to change without notice. 53 DDC-SVC-MAN-0192 Copyright © 2017 DETROIT DIESEL CORPORATION Instrument Panel Lamp Notifications and Description Driver Action • High Exhaust System Temperature (HEST) lamp • SOLID: Exhaust is at high temperature and vehicle is at low speed or parked. • FLASHING: A parked regeneration is in process and the system is not up to temperature.
• No change in driving style required. • When parked, keep vehicle at a safe distance from people and flammable materials or vapors. Instrument Panel Lamp Notifications and Description Driver Action • Malfunction Indicator Lamp (MIL) • Indicates a failure of an emission control device. May illuminate at the same time as the Check Engine Lamp (CEL). Vehicle can be driven to end of shift. If the MIL remains on after three drive cycles, call for service.