ZF CruiseCommand 785CE, Installation And Troubleshooting Manual

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TROUBLESHOOTING TRAIN-156 Rev.B 11/01
Page 4
are the Control Head(s), Processor(s), Electrical Wiring (Harnesses)
and a Power Source.
The following is a brief description of these components. As you read
through this manual there are more detailed explanations of these
components, their function and how this function is accomplished.
1.1.1 Control Head
The primary function of the Control Head is to send out a variable DC
voltage to the Processor. This DC voltage is representative of the Con-
trol Head’s current lever position. In addition to the primary function,
the Control Head also has audible (Sound Transducer) and visual (LED)
status indications, along with a Transfer Button for taking command and
performing other functions.
1.1.2 Processor
The Processor receives the variable DC voltage from the Control
Head(s) and converts these inputs to the appropriate electronic or elec-
tric outputs at the correct time and sequence to the Governor and Gear
Box. The information regarding throttle type, throttle/gear sequencing,
etc., are all stored on memory within the Processor.
1.1.3 Electrical Wiring (Harnesses)
The function of the Electrical Wiring is to move electrical information
from one point to another. The electrical wiring used in the CruiseCom-
mand systems come in the form of pluggable Harnesses. These Har-
nesses may have plugs on one end or both, depending on its purpose.
All systems will have a Harness for Control Head Interface, Engine
Interface, Gearbox Interface and DC Power. In addition to these, there
may be a Serial Communication Harness and/or Tachometer Signal
Harness. The Power and Gearbox Harnesses come in different forms to
accommodate such items as Start Interlock and Troll.
1.1.4 Power Source
All electronic equipment must have power in order to operate. Ensuring
a well charged reliable power source is available is crucial.