Checking The Interlock; Switches - Toro 03806 Operator's Manual

Checking the Interlock

Switches

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, the Enable/Disable
switch is in Disable and the Lower Mow/Raise
control is in the neutral position. In addition,
the engine will stop when the traction pedal is
depressed with either the operator off the seat or
the parking brake engaged.
To verify 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 loopback connector. Carefully unplug
loopback connector from harness connector
(Figure 26).
Figure 26
1. Loop-back connector
3. Connect the Diagnostic ACE display connector
to the harness connector (Figure 27). Make
sure correct overlay decal is positioned on
Diagnostic ACE display.
Figure 27
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 and release the toggle
button, on Diagnostic ACE, to change LED to
"inputs displayed". Do not hold button down.
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 blink on and off when
corresponding 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 damaged switches and
repair any damaged 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.
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