10
UAS P-Series Service Manual 574-848-2200
Troubleshooting
System Testing
Use a digital or analog voltmeter to check power and voltage!
Do NOT use a test light.
1.0
No output on
module when FOB
button is pressed
1.1
No signal from FOB
1.2
One or more of the outputs
have failed
1.3
Module outputs OK, but
relays or equipment do not
operate
1.4
Fuse is blown
1.5
Wire harness problem
1.1.1
Verify that FOB is sending a signal.
See FOB Testing
.
1.2.1
Check the module LED. The output LED should turn ON
as long as relay is ON.
1.2.2
Press FOB button in sequence. Using a volt meter, check
each output. There should be +12V present when the
corresponding FOB button is pressed. If no outputs,
contact Utilimaster customer service.
1.3.1
Check wire and equipment for problem.
1.4.1
Check the fuse in fuse block. If fuse is blown, replace it.
1.5.1
Check input wire harness connections on J2-6 and J2-7.
If no voltage, correct wiring.
Symptom
Possible Cause
2.0
Module does not
operate (no heartbeat
LED)
2.1
Ground or power connection
to module has failed
2.2
Chassis ground connection
has failed
2.3
Module has failed
2.1.1
Check ground and power. Use a voltmeter probe when
checking voltage.
2.1.2
If either ground or power is not present, then locate failure
in wire harness and repair.
.
2.2.1
Check chassis ground connection, it should be clean and
tight, no paint on metal, an external tooth star washer
should be present, no rust or dirt in connection.
2.2.2
Chassis ground should be located on vehicle frame or
directly to battery
.
2.31
Check module LEDs. If they DO NOT flash each time a
corresponding channel is activated, the module has failed.
Contact Utilimaster customer service.
.
2.3.2
Check heartbeat LED. If it is not flashing, the module has
failed. Contact Utilimaster customer service.
Symptom
Possible Cause
3.0
No signal (code) being
transmitted
3.1
FOB battery voltage low
3.2
FOB code is incorrect
3.3
Button does NOT send a
signal when pressed
3.1.1
Check battery voltage, should be 3.0 VDC. Replace
battery if voltage is 2.8 VDC or less. (Signal strength is
dependent upon battery voltage.)
3.2.1
If FOB is sending a signal (LED turns ON), re-enroll
FOB to module. If unable to enroll FOB, contact
Utilimaster customer service.
3.3.1
If a signal is not transmitted by button, contact
Utilimaster customer service.
Symptom
Possible Cause
Corrective Action
Corrective Action
Corrective Action
