ZF CruiseCommand 785CE, Installation And Troubleshooting Manual

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Throttle Testing TRAIN-157 Rev.B 6/01
Page 35
2.0 THROTTLE SIGNAL TESTING
The CruiseCommand system has the capability of sourcing throt-
tle signals in the form of DC Voltage, Current or PWM (Pulse
Width Modulation). The type and range of these signals are
determined by the Throttle Harness and Throttle Profile selected.
When available, the display provided with the engine may be the
most convenient method for monitoring and adjusting the actual
throttle command signal. In cases where the display is not avail-
able or the display’s readings need to be verified, the use of the
Service Field Test Unit (Part No. 13927) is recommended.
Listed below are the methods for connecting and measuring the
various throttle outputs at both Idle and full speed using the Ser-
vice Field Test Unit (Test Unit).
The following tests, which pertain to the throttle signal in ques-
tion, must be performed prior to making a determination that the
CruiseCommand Processor is the cause of the engine’s throttle
signal problem.
Figure 29: Dwg 11653-A