11
UAS P-Series Service Manual 574-848-2200
Symptom
Possible Cause
4.4
Module power input or ground
is exposed to radiated noise
from wire harness or motors
4.3
Poor ground connection
4.2
FOB 3-volt battery is low
4.1
Interference
4.5
Module component damaged
or defective
4.6
Other equipment installed in
vehicle causing voltage drop
when initially turning on
.
4.4.1
Disconnect module power input or ground from main wire
harness.
4.4.2
Run new wire from vehicle battery to Red wire.
4.4.3
Remove black wire on module from vehicle wire harness
and install on the vehicle frame for a new chassis ground
or battery ground.
4.3.1
Remove any paint or residue from metal, use an external
tooth star washer and tighten new chassis ground
terminal securely to vehicle frame.
4.2.1
Replace battery if voltage is 2.8 volts or below (All FOBs
use: Lithium Coin Style - #CR2032)
4.5.1
Contact Utilimaster customer service and return unit for
repair.
4.6.1
Disconnect all other equipment from ground and power.
Check range. If ok, run power and ground directly from
battery.
Corrective Action
4.0
Poor range 0’ to 5’
(pulsating 0’ to 5’)
4.1.1
Electromagnetic interference (EMI) can be generated by
motors, welding equipment, relays, RF from other radio
frequency devices, etc. which may be in close proximity
to the module or FOB.
4.1.2
Move vehicle out of range of EMI caused by high levels
of radio frequency from devices such as welding equip-
ment, as this is a temporary problem.
