Greensmaster 3300/3400 Page 6 -- 15 Electrical System
Verify Diagnostic Display Output Functions
The Diagnostic Display has the ability to detect which
outputsolenoidsorrelaysareturnedonbytheTECcon-
troller.Thisisaquickwaytodetermineifamachinemal-
function is electrical or hydraulic.
NOTE: Anopenoutput(e.g.anunpluggedconnectoror
a broken wire) cannot be detected with the Diagnostic
Display.
1. Park machine on a level s urface, lower the cutting
units, engage the parking brake and stop the engine.
2. Remove right side cover next to operator seat to al-
low access to access TEC controller. Locate wire har-
ness and connectors near TEC controller. Carefully
unplug loopback connector from harness connector
(Fig. 16).
3. ConnecttheDiagnosticDisplayconnectortothehar-
nessconnector.Makesurecorrectoverlaydecalisposi-
tioned on the Diagnostic Display (see Special Tools in
this chapter).
4. Turn the ignition switch to the RUN position.
NOTE: The red textonthe overlay decal refers tocon-
troller inputs and the green text refers to controller out-
puts.
5. The green “OUTPUTS DISPLAYED” LED, on lower
right columnof the DiagnosticDisplay, shouldbe illumi-
nated. If “INPUTS DISPLAYED” LED is illuminated,
press the toggle button on the Diagnostic Display to
change the LED to “OUTPUTS DISPLAYED”.
NOTE: It may be necessary to toggle between “IN-
PUTSDISPLAYED”and“OUTPUTSDISPLAYED”sev-
eraltimes toperform thefollowingstep. Tochange from
inputstooutputs,presstogglebuttononce.Thismaybe
done as often as required. Do not press and hold
toggle button.
6. Sit on seat, start engine and attempt to operate the
desiredfunctionofthemachine.Theappropriateoutput
LED’sshould illuminate onthe Diagnostic Display toin-
dicate that the TEC controller is turning onthatfunction
(see Diagnostic Display Outputs and LED Operation
chart on next page). The outputs can be checked with
the ignition switch in the RUN position and the engine
not running.
NOTE: Ifthe“DIAG.LAMP
”output LEDis blinking,this
indicates that the TEC controller has detected a fault
during machine operation. Refer to Diagnostic Light in
this section for information on retrieval and clearing of
controller faults.
A. IfthecorrectoutputLED’sdonotilluminate,verify
thatther equired inputswitchesare inthenecessary
positions to allow that function to occur (see TEC
Controller Logic Chart in this s ection). Verify correct
switch function.
B. If the output LED’s are on as specified, but the
machine does not function properly, consider that
the controller is operating correctly and a problem
existswithsomeothercomponent.Inspectelectrical
components and circuit for the affected function.
Also, suspecta non-electrical problem (e.g.hydrau-
lic component problem). Repair as necessary.
C. If each input switch is in the correct position and
functioning correctly, but the output LED’s are not
correctly illuminated, this may indicate a controller
problem. If thisoccurs,contact your Toro Distributor
for assistance.
7. After output function testing is completed, discon-
nect the Diagnostic Display from wire harness. Plug
loopbackconnector intoharnessconnector. Installright
side cover next to operator seat.
1. TEC controller location 2. Loopback connector
Figure 16
1
2
Electrical
System
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