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6.
The Diagnostic ACE will illuminate the LED asso-
ciated 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, engage the traction pedal,
etc.), and note that the appropriate LED on
Diagnostic ACE will blink on and off when corre-
sponding switch is closed. Repeat on each switch
that is possible to be changed by hand.
7.
If switch is closed and appropriate LED does not
turn on, check all wiring and connections to switch
and/or check switches with an ohm meter. Replace
any defective switches and repair any defective
wiring.
The Diagnostic ACE also has the ability to detect which
output solenoids or relays are turned on. This is a quick
way to determine if a machine malfunction is electrical
or hydraulic.
To verify output function:
1.
Park the machine on a level surface, lower the cut-
ting units, stop the engine and engage the parking
brake.
2.
Open the control panel cover. Locate the wire har-
ness and connectors near the controller. Carefully
unplug the loopback connector from the harness
connector. Set the height-of-cut selector knob to
position "A".
3.
Connect the Diagnostic ACE connector to the har-
ness connector. Make sure the correct overlay decal
is positioned on Diagnostic ACE.
4.
Turn the key switch to the ON position, but do not
start the machine.
Note: The red text on the overlay decal refers to
input switches and the green text refers to outputs.
5.
The "outputs displayed" LED, on lower right col-
umn of the Diagnostic ACE, should be illuminated.
If the "inputs displayed' LED is illuminated, press
the toggle button on Diagnostic ACE to change
LED to "outputs displayed".
24
Note: It may be necessary to toggle between
"inputs displayed" and "outputs displayed" several
times to do the following step. To toggle back and
forth, press the toggle button once. This may be
done as often as required. DO NOT HOLD THE
BUTTON.
6.
Sit on the seat and attempt to operate the desired
function of the machine. The appropriate output
LEDs should illuminate to indicate that the ECU is
turning on that function. (Refer to the list below to
be certain of the specified output LEDs.
Note: If any output LED is blinking, this indicates an
electrical problem with that OUTPUT. Repair or replace
defective electrical parts immediately. To reset a blink-
ing LED, turn the key switch to "OFF", then back to
"ON".
If no output LEDs are blinking, but the correct output
LEDs do not illuminate, verify that the required input
switches are in the correct positions for the function to
occur.
If the output LEDs are on as specified, but the machine
does not function properly, this indicates a non-electrical
problem. Repair as necessary.
Note: Due to electrical system constraints, the output
LEDs for "START", "PREHEAT" and "ETR/ALT"
may not blink even though an electrical problem may
exist for those functions. If the machine problem appears
to be with one of these functions, check the electrical
circuit with a volt/ohm meter to verify that no electrical
problem exists to these functions.
If each input switch is in the correct position and func-
tioning correctly, but the output LEDs are not correctly
illuminated, this indicates an ECU problem. If this
occurs, contact your Toro Distributor for assistance.
IMPORTANT: The Diagnostic ACE display must not
be left connected to the machine. It is not designed to
withstand the environment of the machine's every
day use. When finished using the Diagnostic ACE,
disconnect it from the machine and reconnect the
loopback connector to the harness connector. The
machine will not operate without the loopback con-
nector installed on the harness. Store the Diagnostic
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