Class1 107490 - UNI-Governor 107396 107269 software v 6 00 User Manual

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Governor does not power up, Message Center is blank

Check for power at pin 1 of the 4 pin connector and ground at pin 2 with a voltmeter across pin 1 (red
lead, power) and pin 2 (black lead, ground).
Check that the terminals are fully inserted into the connector, the orange wedge lock is inserted properly
and the weather seal is in place and not distorted.

If Power and Ground are present and the governor Message Center is still blank then the problem is
internal and the governor should be replaced.

If either power or ground is missing, then the problem is in the vehicle wiring and that should be investi-
gated. (contact OEM if necessary).
Replacing the governor will not rectify this situation.

Governor will not change engine RPM or pump pressure

The THROTTLE READY Interlock must be present. A visual determination can be made by observing
the THROTTLE READY LED. If it isn’t on then check for a 12 V interlock to pin 2 of the governor’s 12 pin
connector. This is an OEM function and must be present for the governor to operate.
If 12 VDC is not present at the wire installed at pin 2, then the governor is not the problem.

Contact the OEM for further assistance.

A MODE must be selected before the governor will control the engine. Make sure that either the RPM or
PRESSURE LED is illuminated and the Message Center indicates THROTTLE or PRESSURE.
The output signal will not change if a mode is not selected. Output will remain at hardware idle (approx.
0.7 VDC or 12% PWM). Once a mode is selected, the governor idle output will increase to the appro-
priate software idle signal.
To monitor the governor output voltage, an internal voltmeter is included.
With [MODE] showing in the display, enter the following Password:

INC IDLE IDLE IDLE IDLE IDLE IDLE INC

The Message Center becomes an output voltmeter

OUT=x.xV

The output voltage can be monitored to ensure that it increases and decreases with the INC and DEC
switches.
Check that the remote throttle switch is active at the ECM. Use a meter or diagnostic reader (DDR).
Most engines require this input before they will utilize a remote throttle signal.
The governor may or may not be used to satisfy this requirement. The OEM is best able to answer this
question. If the governor is being used, then the signal should be at pin 11 and the output to the engine
found at pin 12 after a MODE is selected. Check that the relay is switching and that terminal 11 and 12
of the 12 pin connector have continuity. If a mode can be selected, the governor output is changing, and
the relay closes then the governor is not the problem.
Contact the OEM for further assistance.