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Diagnostic ACE Display
The machine is equipped with an electronic controller
which controls most machine functions. The controller
determines what function is required for various input
switches (i.e. seat switch, key switch, etc.) and turns on the
outputs to actuate solenoids or relays for the requested
machine function.
For the electronic controller to control the machine as
desired, each of the input switches, output solenoids and
relays must be connected and functioning properly.
The Diagnostic ACE and overlay are tools to help the user
verify correct electrical functions of the machine. If you do
not have a Diagnostic ACE , contact your Authorized Toro
Distributor.
Checking the Interlock
Switches
Caution
If safety interlock switches are disconnected or
damaged the machine could operate unexpectedly,
causing personal injury.
• Do not tamper with the interlock switches.
• Check the operation of the interlock switches
daily and replace any damaged switches before
operating the machine.
• Replace switches every two years regardless of
whether they are operating properly or not.
The purpose of the interlock switches are to prevent the
engine from cranking or starting unless the traction pedal is
in NEUTRAL, to ensure cutting units disengage when
raised or when operator leaves the seat. In addition, the
engine will stop when the traction pedal is depressed with
operator off the seat.
Verifying Interlock Switch 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 loop back
connector from harness connector (Fig. 29).
1
1. Wire harness and connectors
3. Connect the Diagnostic ACE display connector
(Fig. 28) to the harness connector. Make sure correct
overlay decal is positioned on Diagnostic ACE display.
1
1. 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 "inputs displayed" LED, on lower right column of
the Diagnostic ACE, should be illuminated. If "outputs
displayed" LED is illuminated, press the toggle button,
on Diagnostic ACE, to change LED to "inputs
displayed".
6. The Diagnostic ACE 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, engage traction pedal, etc.), and
note that the appropriate LED on Diagnostic ACE will
29
Figure 29
Figure 30
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