EXPLANATION OF ABBREVIATIONS AND TERMS
Power Take-Off. Also, referred to as VSG
(Variable Speed Governor).
Pulsewidth Modulated: Modulated signal provided
by the DDEC system.
Resume/Accelerate Switch used for cruise control.
Stop Engine Light: Typically mounted on the instrument
panel. It has two functions:1.It is used as warning to the
operator that a potential engine damaging condition has
been detected. If the DDEC system is programmed for
shutdown, the engine will shutdown on its own within
30 seconds. The engine should not be run until the
condition is corrected.2.It is used by the operator or
technician to "flash" out active trouble codes.
Stop Engine Override: Allows the stop engine condition
to be overridden in case it is required.
Set/Coast Switch: Used in cruise control.
Synchronous Reference Sensor: Indicates a
specific cylinder in the firing order.
Turbocharger Boost Sensor: Monitors turbo boost.
To be determined.
Tachometer Driver: An output from the ECM for
electronic tachometers and or data loggers.
Throttle Position Sensor: Used to detect throttle request
(a component of the EFPA). Also, referred to as LSG.
Timing Reference Sensor: Used to detect whenever
any cylinder is about to be fired.
Vehicle Interface Harness (OEM Wiring)
Vehicle Identification Number
Variable Speed Governor. Also, referred to as
PTO (Power Take-Off).
Vehicle Speed Sensor: Used to detect vehicle speed.
Vehicle Speed Sensor Open Collector: An ECM
input which must be used in addition to the VSS
positive input when certain types of vehicle speed
sensors are used. Refer to the Application and
Installation manual for installation.
* As a light bulb check and system check, the check engine light will come on for about 5 seconds when the ignition is turned on. If
the CEL remains on, or comes back on, the self diagnostic system has detected a problem. If the problem goes away, the light will
go out, but a trouble code will be stored in the ECM as an inactive code.
As a light bulb check and system check, the stop engine light will come on for about 5 seconds when the ignition is turned on.
Abbreviations and Terms
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION