Diagnostic Display
Groundsmaster 4300--D machines are equipped with a
TEC controller which controls machine electrical func-
tions. The controller monitors various input switches
(e.g. ignition switch, seat switch, etc.) and energizes
outputs to actuate solenoids or relays for the requested
machine function.
3
For the controller to control the machine as desired,
each of the input switches, output solenoids and relays
must be connected and functioning properly.
2
1
The Diagnostic Display (see Special Tools in this chap-
ter)isatooltohelpthetechnicianverifycorrectelectrical
functions of the machine.
Figure 9
1. TEC controller location
2. Loopback connector
3.
Harness connector
IMPORTANT: The Diagnostic Display must not be
left connected to the machine. It is not designed to
withstand the environment of the machine’s every
dayuse.WhenuseoftheDiagnosticDisplayiscom-
pleted, disconnect it from the machine and recon-
nect loopback connector to harness connector.The
machine will not operate without the loopback con-
nector installed on the harness. Store the Diagnos-
tic Display in a dry, secure, indoor location, not on
machine.
1
Verify Diagnostic Display Input Functions
2
CAUTION
Figure 10
The interlock switches are for the protection of
the operator and bystanders and to ensure cor-
rect operation of the machine. Do not bypass or
disconnect switches. Check the operation of the
interlockswitchesdailyforproperoperation.Re-
place any malfunctioning switches before oper-
ating the machine.
1.
Diagnostic display
2.
Loopback connector
DIAGNOSTIC
DISPLAY
OVERLAY
117--0171
1.
decks, stop the engine and engage the parking brake.
Park machine on a level surface, lower the cutting
2.
connectors near TEC controller. Carefully unplug loop-
back connector from harness connector (Fig. 9).
Open control panel cover. Locate wire harness and
3.
ness connector (Fig. 10). Make sure correct overlay de-
cal is positioned on the Diagnostic Display (Fig. 11).
ConnecttheDiagnosticDisplayconnectortothehar-
4.
Turn the ignition switch to the RUN position, but do
not start machine.
NOTE: The red text on the overlay decal refers to con-
troller inputs and the green text refers to controller out-
puts.
Figure 11
Electrical System
Page 5 -- 8
Groundsmaster 4300--D
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