Checking The Interlock Switches - Toro 31230 Operator's Manual

Checking the Interlock
Switches
The interlock switches prevent the engine from cranking or
starting unless the traction pedal is in the N
and the PTO is disengaged. The engine should stop when
you press the traction pedal when you are not sitting on the
seat or if the parking brake is engaged.
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.
Verifying the Interlock Switch Function
1. Park the machine on a level surface, lower the
attachment, shut off the engine, and engage the parking
brake.
2. Raise the seat.
3. Locate the wire harness and connectors near the
controller (Figure 18).
Figure 18
1. Wire harness and connectors
4. Connect the Diagnostic ACE display tool connector to
the diagnostic connector
Note: Ensure that the correct overlay decal is
positioned on the Diagnostic ACE display.
position
EUTRAL
g018321
(Figure 19).
1. Diagnostic ACE
5. Turn the key switch to the O
start the engine.
Note: The red text on the overlay decal refers to input
switches and the green text refers to outputs.
6. The "inputs displayed" LED, on the lower right
column of the Diagnostic ACE, should be illuminated.
If the "outputs displayed" LED is illuminated, press
the toggle button on the Diagnostic ACE to change it
to "inputs displayed."
The Diagnostic ACE will illuminate the LED
associated with each of the inputs when you close that
input switch.
7. 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
blinks on and off when you close the corresponding
switch. Repeat this for all switches that you can change
manually.
8. If a switch is closed and the appropriate LED does not
turn on, check all wiring and connections to the switch
and/or check the switch with an ohm meter. Replace
all switches and repair wiring that are not functioning.
Note: The Diagnostic ACE also has the ability to detect
which output solenoids or relays are turned on. This is a
quick way to determine the source of the malfunction.
Verifying the Output Function
1. Park the machine on a level surface, lower the
attachment, shut off the engine, and engage the parking
brake.
2. Raise the seat.
3. Locate wire harness and connectors near the controller.
4. Carefully unplug the loopback connector from the
harness connector.
21
Figure 19
position, but do not
N