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CHAPTER 4
MAINTENANCE AND SERVICE INSTRUCTIONS
4.1 MAINTENANCE INSTRUCTIONS
The Universal II has no user-serviceable parts, but steps can be taken to extend its trouble-free operation.
• Periodically check cabling for insulation cracking and wire connections for frayed wires.
• Insure there is no standing water around the enclosure.
• Check all mounting hardware to insure proper tightness.
4.2 ELECTRICAL TROUBLESHOOTING
4.2.1 Operating Environment
One of the most common causes of improper operation is trying to operate outside of the stated system requirements. (See section
1.4.1 for DC power requirements). A good method of checking the voltage at the Universal II is to connect a voltmeter to the wires/
pins of the Peripheral Power Output on the DC Power/Signal cable (pins 22 and 25). Refer to section 2.4 and Figure 2-8 for additional
information. This will give a good indication of power loss across the DC cabling. For long runs, it may be necessary to add an inter-
mediate junction box in the DC cable so that DC power can be applied closer to the Universal II.
4.2.2 Common Electrical Issues
Symptom
Potential Cause
What to Check
Totally
Inoperative
Lack of Power
Remove the Power/Signal Cable connector
from the Universal II box. Check for voltage
approximately equal to vehicle battery
voltage between pins 1 and 2.
Another method is to place your ear close
to the Universal II, during power-up. A
relay energizing should occur with an
accompanying “click” sound.
Not Enabled
Remove the Power/Signal Cable connector
from the Universal II box. Check for
continuity between pin 13 and pin 1, or pin 13
and pin 2.
With the system powered and fully
connected, measure the voltage on any one
of the switch inputs that are either floating
or unconnected.
Internal Fuse Blown
Leaving the Power/Signal Cable connected,
remove the Monitor Cable. Check the
voltage between pin 22 and 25 (Peripheral
Power) on the Power/Signal Cable, and check
the voltage between pin A and E of the
Monitor Cable jack on the Universal II.
Switches
function
properly, but
CAN Joystick
and other
network devices
do not
CAN bus is improperly
wired
Check CAN bus wiring
CAN bus is improperly
terminated
Turn off system power and remove the
Power/Signal Cable connector. Measure the
resistance between pins 23 and 24.
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