Toro Groundsmaster 4100-D Service Manual page 193

4. Turn the ignition switch to the ON position, but do not
start machine.
NOTE: The red text on the Diagnostic Display overlay
decal refers to input switches and the green text refers
to TEC outputs.
5. Make sure that the "INPUTS DISPLAYED" LED, on
lower right column of the Diagnostic Display, is illumi-
nated. If "OUTPUTS DISPLAYED" LED is illuminated,
press the toggle button on the Diagnostic Display to
change to "INPUTS DISPLAYED" LED.
6. The Diagnostic Display will illuminate the LED
associated with each of the inputs when that input switch
is closed. Individually, change each of the switches from
open to closed (i.e., sit on seat, press traction pedal,
etc.), and note that the appropriate LED on the Diagnos-
tic Display will illuminate when the corresponding switch
is closed. Repeat on each switch that is possible to be
changed by hand (see Inputs and LED Operation chart
on following page).
NOTE: When the Diagnostic Display is attached to the
wire harness connector and the ignition switch is in the
ON position, the input LED for hydraulic temp and cool-
ant temp should be illuminated. If the harness connector
is disconnected from the sensor for either of these in-
puts, the appropriate LED should go off after a few sec-
ond delay. Then, if the harness connector is reattached
to the sensor, the input LED should again illuminate after
a few seconds.
7. If appropriate LED does not toggle on and off when
switch state is changed, check all wiring and connec-
tions to that switch and/or test switch (see Component
Testing in this chapter). Replace any defective switches
and repair any damaged wiring.
8. After input functions testing is complete, disconnect
the Diagnostic Display connector from the harness con-
nector and plug loopback connector into wire harness.
Secure controller cover to machine.
Groundsmaster 4100--D/4110--D
TEC- -5002
MASTER
OVERLAY
TEC- -5001
SLAVE
OVERLAY
Page 5 - - 7
Figure 9
Figure 10
Electrical System