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blink on and off when corresponding switch is closed
and opened. Repeat on each switch that it is possible to
be changed by hand.
7. If switch is closed and appropriate LED does not blink
on and off, check all wiring and connections to switch
and/or check switches with an ohm meter. Replace any
defective switches and repair any defective wiring.
8. Now start engine and raise and lower each cutting unit.
Note the appropriate LED on the Diagnostic ACE (i.e.
LED is illuminated when cutting unit is lowered and
LED is not illuminated when cutting unit is raised).
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.
Verifying Output Function
1. Park machine on a level surface, lower the cutting units,
stop the engine and engage the parking brake.
2. Open control panel cover. Locate wire harness and
connectors near controller. Carefully unplug loopback
connector from harness connector.
3. Connect the Diagnostic ACE connector to the harness
connector. Make sure correct overlay decal is positioned
on Diagnostic ACE.
4. Turn the key switch to the ON position, but do not start
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 column of
Diagnostic ACE, should be illuminated. If "inputs
displayed" LED is illuminated, press the toggle button,
on Diagnostic ACE, to change LED to "outputs
displayed".
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 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. (If you need help verifying the
correct input settings for each function, refer to the
Logic Chart on page 32) The appropriate output LED's
should illuminate to indicate that the ECU is turning on
that function. (Refer to the logic chart to be certain of
the specified output LED's).
Note: If any output LED is blinking, this indicates an
electrical problem with that OUTPUT. Repair / replace
defective electrical parts immediately. To reset a blinking
LED, turn the key switch "OFF", then back "ON".
If no output LED's are blinking, but the correct output
LED's do not illuminate, verify that all the input switches
work by following the instructions on how to verify
interlock switches. Verify correct switch function.
If the output LED's 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
LED's for "START", "MONITOR" 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, be certain to check the electrical
circuit with a volt / ohm meter to verify that no electrical
problem exists to these functions.
If electronic controller experiences an output failure for
either the cruise control or one of the cutting units, the
controller will disable the machine function.
Indications that this is the cause of the problem include:
• Flashing green diagnostic light
• Diagnostic ACE will illuminate the "output fail" LED.
• Diagnostic ACE will flash which output failed.
• Machine will not respond to ignition key inputs.
The above indicates an ECU problem, contact your local
Authorized Toro Distributor for assistance.
If each output switch is in the correct position and
functioning correctly, but the output LED's are not
correctly illuminated, this indicates an ECU problem. If this
occurs, contact your Toro Distributor for assistance.
Important
The Diagnostic ACE display should not be
left connected to the machine. It is not designed to
withstand the environment of the machine's every day use.
When done using Diagnostic ACE, disconnect it from the
machine and reconnect loopback connector to harness
connector. Machine will not operate without loopback
connector installed on harness. Store Diagnostic ACE in
dry, secure location in shop, not on machine.
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