Groundsmaster 4300--D Page 5 -- 9 Electrical System
5. The “INPUTS DISPLAYED” LED, on lower right col-
umn of the Diagnostic Display, should be illuminated. If
the green“OUTPUTS DISPLAYED” LED is illuminated,
press the toggle button on the Diagnostic Display to
change to “INPUTS DISPLAYED” L ED.
6. The Diagnostic Display will illuminate the LED
associated with each of the inputs when that input is in
thepositionidentifiedontheDiagnosticDisplayoverlay.
Individually, change the position of each of the inputs
(i.e.sit onseat,press tractionpedal, etc.),and notethat
the appropriate LED on the Diagnostic Display toggles
onandoffwhentheinputstateischanged(seechartbe-
low).Repeatfor allinputsthatcan bechangedbyhand.
7. If appropriate LED does not toggle on and off when
inputstateischanged,check allwiringandconnections
to the switch for that input and/or test switch (see Com-
ponent Testing in this chapter). Replace all defective
switches and repair any damaged wiring.
NOTE: The TEMP WARNING and ALT FAULT TEC
controllerinputs cannot bereliablytested bygrounding
the harness leads at the engine temperature sensor or
alternator.Ifenginetemperatureisveryexcessive oral-
ternator is faulty, a TEC c ontroller fault should have
been detected. Refer to Diagnostic Light in this section
for information on retrieval and clearing ofTEC control-
ler faults.
NOTE: When the ignition switchis in the OFF position,
all Diagnostic Display LED’s should be OFF.
8. After input function testing is completed, disconnect
the Diagnostic Display from wire harness. Plug loop-
back connector into harness connector. Install control
panel cover.
Diagnostic Display
TEC Controller Inputs
Diagnostic Display
LED Operation
PARKING BRAKE OFF Parking brake released: LED ON
Parking brake applied: LED OFF
TRACTION NEUTRAL Traction pedal in neutral: LED ON
Traction pedal in forward or reverse: LED OFF
SEAT SWITCH Seat occupied: LED ON
Seat NOT occupied: LED OFF
TRANSPORT OFF Mow speed limiter in MOW: LED ON
Mow speed limiter in TRANSPORT: LED OFF
JOYSTICK RAISE Joystick moved rearward: LED ON
Joystick in neutral: LED OFF
JOYSTICK LOWER Joystick moved forward: LED ON
Joystick in neutral: LED OFF
PTO ENABLE PTO switch ON: LED ON
PTO switch OFF: LED OFF
OIL PRES LOW Engine not running OR low engine oil pressure: LED ON
Engine oil pressure OK: LED OFF
TEMP WARNING Excessive engine temperature: LED ON
Normal engine temperature: LED OFF
TEMP SHUTDOWN Very excessive engine temperature: LED ON
Normal engine temperature: LED OFF
ALT FAULT Engine not running or alternator faulty: LED ON
Alternator OK: LED OFF
KEY START
(NOTE: Turn PTO switch ON so en-
gine will not start when turning ignition
switch to START)
Ignition switch in START: LED ON
Ignition switch in RUN: LED OFF
KEY RUN Ignition switch in RUN or START: LED ON
Electrical
System
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