Factory Cat MINI-MAG SERIES, Service Manual

Page: 108 / 121

Mini-Mag Service Manual V1.0
13
13-30
CENTRAL COMMAND CONTROLLER
“BRUSH SWITCH”
does not work properly.
Operate machine
and verify the
customers
complaint.
Does the switch
work properly?
Instruct owner on
proper machine
operation
YES
Using a voltmeter set the meter
to DC volts. Connect the ( -)
probe of the meter to the ( - )
buss bar with a clip on your
meter probe. Measure at the
center tab of the Brush switch
switch. (dark blue wire)
Is there between
0.8 and 2.8 volts?
Place the ( + ) probe on
the center terminal of
the switch. (blue wire)
and the ( - ) probe on
the negative buss bar.
Turn the brush switch
on and measure the
voltage.
YES
At the 20 pin Molex connector
at the controller, back probe
pin #11 with the positive probe
of the meter and touch the
negative probe of the meter to
the negative buss bar.
Is there
between 0.8 and
2.8 volts?
Replace the
controller
NO
YES
Repair open circuit between pin #11
on the controller and center terminal
of the brush pressure the switch.
NO
MiniMAG – TRACTION DRIVE w/CCII
BRUSH SWITCH DIAGNOSIS
1 of 2
Turn on the scrub deck switch and then
drive the machine. Observe the LCD
display and see if the brush icon appears.
Repeat this with the one touch switch.
Did the icon
turn on?
Go to the BRUSH
MOTOR section
YES
NO
GO TO
PAGE 2
“A”
NO