Instrument Panel Lamps Table 10. Malfunction Indicator Lamp Table 11. Fuel Filter Restriction Sensor Lamp: Fuel Filter Failed 50 All information subject to change without notice. Copyright © 2017 DETROIT DIESEL CORPORATION DDC-SVC-MAN-0192 Lamp Lamp Name Description Results High Exhaust System Temperature (HEST) Lamp Lamp is yellow. Indicates exhaust temperature is above a preset limit and unit is operating at low vehicle speed (below 5 mph [8 kph]). When the engine speed is elevated for a parked regeneration, lamp will flash once every 10 seconds. Vehicle can be driven. Lamp solid for an extended period (Longer than 40 Minutes) - call for service.
Lamp Solid Lamp Flashing • At the start of every ignition cycle (bulb check). • Vehicle speed is less than 5 mph and the Diesel Particulate Filter (DPF) outlet temperature is greater than 525° C (977° F). Flashes every 10 seconds when the Selective Catalytic Reduction ( SCR Catalyst) is not up to temperature Lamp Lamp Name Description Results Malfunction Indicator Lamp (MIL) Yellow lamp Indicates a failure of an Emission Control device. May illuminate at the same time as the Amber Warning Lamp. Vehicle can be driven to end of the shift. Call for service.
Lamp Solid Lamp Flashing • At the start of every ignition cycle (a bulb check) • For any emission related fault (light out when the fault is inactive) Never flashes