Vehicle Emergency Operation
Emergency Running Mode
Detroit™ Gen 5 Heavy Duty engines are equipped with Detroit Diesel Electronic
Control® (DDEC®) which monitors and controls the Detroit™ powertrain
functions and operation. As soon as an engine fault is detected, it is evaluated and
one of the following measures is initiated.
• DDEC® will turn on an instrument panel indicator when certain predetermined
conditions are present.
•
If the fault is serious enough to impair normal operation, DDEC
®
switches over
to a limp mode. The limp speed is dependent on engine control parameters and
could be as low as 1000 rpm. This allows the operator to safely move the vehicle
to a service location or a safe stopping area.
To prevent possible serious equipment damage, have any faults corrected
immediately by an authorized Detroit™ service outlet.
Emergency Jump Starting
The engine's electronic system operates on 12 volts DC. If a Detroit™ Gen 5
Heavy Duty engine requires emergency jump starting, do not exceed 16 volts DC
as this may damage the MCM and or other electrical equipment.
Before attempting to jump start the engine, the jumper cables must be connected
using the sequence of first, positive-to-positive, and then last, negative-to-chassis or
suitable ground. Reversing battery polarity may damage the electrical equipment.
Failure to connect jumper cables in the proper sequence can result in alternator
and/or equipment damage.
Stop Engine Override Option
The engine shutdown feature is designed to prevent engine damage from occurring;
extending the engine run time during an engine shutdown could cause engine
damage. The Stop Engine Override feature allows the operator to override the
automatic stop engine sequence. Only use the Stop Engine Override during
emergency situations where moving the vehicle to a safe location is critical. The
override should not be used for extended periods of time. For more information on
Stop Engine Override, Refer to section "Detroit Diesel Electronic Control System
Operation".
Gen 5 DD Platform Operators Manual
All information subject to change without notice. 31
DDC-SVC-MAN-0217 Copyright © 2020 DETROIT DIESEL CORPORATION
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