BASIC KNOWLEDGE REQUIRED (Cont'd.)
Synchronous Reference Sensor: Detects when the first cylinder in the firing order is about to
Turbo charged 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.
Two Speed Governor Switch.
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 manual for installation.)
Change 3 3-345.11