Toro GroundsmasterR 4300-D Service Manual page 159

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" LED.
6. The Diagnostic Display will illuminate the LED
associated with each of the inputs when that input is in
the position identified on the Diagnostic Display overlay.
Individually, change the position of each of the inputs
(i.e. sit on seat, press traction pedal, etc.), and note that
the appropriate LED on the Diagnostic Display toggles
on and off when the input state is changed (see chart be-
low). Repeat for all inputs that can be changed by hand.
7. If appropriate LED does not toggle on and off when
input state is changed, check all wiring and connections
to the switch for that input and/or test switch (see Com-
Diagnostic Display
TEC Controller Inputs
PARKING BRAKE OFF
TRACTION NEUTRAL
SEAT SWITCH
TRANSPORT OFF
JOYSTICK RAISE
JOYSTICK LOWER
PTO ENABLE
OIL PRES LOW
TEMP WARNING
TEMP SHUTDOWN
ALT FAULT
KEY START
(NOTE: Turn PTO switch ON so en-
gine will not start when turning ignition
switch to START)
KEY RUN
Groundsmaster 4300--D
ponent Testing in this chapter). Replace all defective
switches and repair any damaged wiring.
NOTE: The TEMP WARNING and ALT FAULT TEC
controller inputs can not be reliably tested by grounding
the harness leads at the engine temperature sensor or
alternator. If engine temperature is very excessive or al-
ternator is faulty, a TEC controller fault should have
been detected. Refer to Diagnostic Light in this section
for information on retrieval and clearing of TEC control-
ler faults.
NOTE: When the ignition switch is 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
LED Operation
Parking brake released: LED ON
Parking brake applied: LED OFF
Traction pedal in neutral: LED ON
Traction pedal in forward or reverse: LED OFF
Seat occupied: LED ON
Seat NOT occupied: LED OFF
Mow speed limiter in MOW: LED ON
Mow speed limiter in TRANSPORT: LED OFF
Joystick moved rearward: LED ON
Joystick in neutral: LED OFF
Joystick moved forward: LED ON
Joystick in neutral: LED OFF
PTO switch ON: LED ON
PTO switch OFF: LED OFF
Engine not running OR low engine oil pressure: LED ON
Engine oil pressure OK: LED OFF
Excessive engine temperature: LED ON
Normal engine temperature: LED OFF
Very excessive engine temperature: LED ON
Normal engine temperature: LED OFF
Engine not running or alternator faulty: LED ON
Alternator OK: LED OFF
Ignition switch in START: LED ON
Ignition switch in RUN: LED OFF
Ignition switch in RUN or START: LED ON
Page 5 - - 9 Electrical System