Toro Reelmaster 3550-D Service Manual page 180

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 TEC inputs and the green text refers to
TEC outputs.
5. The "inputs displayed" LED, on lower right column of
the Diagnostic Display, should be illuminated. 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 Table 2: Diagnostic Display In-
puts).
Diagnostic Display Inputs
ENGINE TEMP (A)
P BRAKE OFF
NEUTRAL
LOWER REEL
RAISE REEL
PTO
MOW
ALT. L
ENGINE OIL PRESSURE
SEAT
BACKLAP
TURN AROUND SWITCH
(RM 3555−D/3575−D)
Electrical System
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 alternator, engine temp
and engine oil pressure should be illuminated. To test
these inputs, disconnect the wire harness connector
from the specific sensor and the appropriate LED should
go off after a few second delay. When the harness con-
nector 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 wire harness
connector and plug loop−back connector into wire har-
ness. Install cover onto control panel.
Diagnostic Display LED Operation
Engine coolant temperature high, sensor and circuit wiring OK: LED ON
Coolant temperature low, sensor or circuit wiring faulty: LED OFF
Parking brake disengaged: LED ON
Parking brake engaged: LED OFF
Traction pedal in neutral: LED ON
Traction pedal in forward or reverse: LED OFF
Lower/raise control lever in LOWER position: LED ON
Lower/raise control lever NOT in LOWER position: LED OFF
Lower/raise control lever in RAISE position: LED ON
Lower/raise control lever NOT in RAISE position: LED OFF
Enable/disable switch in ON position (pulled out): LED ON
Enable/disable switch in OFF position (pushed in): LED OFF
Mow/transport slide in the MOW position: LED ON
Mow/transport slide in the TRANSPORT position: LED OFF
Engine not running OR alternator faulty: LED ON
Alternator OK: LED OFF
Engine not running OR low engine oil pressure: LED ON
Engine oil pressure OK: LED OFF
Operator seat occupied: LED ON
Operator seat empty: LED OFF
Cutting reels in backlap position: LED ON
Cutting reels NOT in backlap position: LED OFF
Lift arms at/or below turn around position: LED ON
Lift arms above turn around position: LED OFF
Table 2: Diagnostic Display Inputs
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