Understanding The Diagnostic Light; Diagnostic Ace Display - Toro 31230 Operator's Manual

Testing the Safety-Interlock System
Service Interval: Before each use or daily
If the safety system does not operate as described below, have
an Authorized Service Dealer repair the system immediately.
1. Sit on the seat, engage the parking brake, and move
the PTO to the O
N
The engine should not start.
2. Sit on the seat, engage the parking brake, move the
PTO to the O position, and engage the traction
FF
pedal. Try starting the engine: The engine should not
start.
3. Sit on the seat, engage the parking brake, move the
PTO switch to the O
pedal to return to the N
engine. While the engine is running, release the parking
brake, engage the PTO and rise slightly from the seat:
The engine should stop within 2 seconds.
4. With an empty seat, engage the parking brake, move the
PTO switch to the O
pedal to the N
EUTRAL
the engine is running, engage the traction pedal; the
engine should stop within 2 seconds.
5. With an empty seat, disengage the parking brake, move
the PTO switch to the O
traction pedal to return to the N
starting the engine: The engine should not start.
Understanding the Diagnostic
Light
The machine comes with a diagnostic light that indicates if
the electronic controller senses an electronic malfunction.
The diagnostic light is located on the control panel
17). When the electronic controller is functioning correctly
and the key switch is moved to the O
diagnostic light will turn on for 3 seconds and turn off to
indicate that the light is working properly. If the engine
shuts off, the light will turn on steady until you change the
key position. The light blinks if the controller detects a
malfunction in the electrical system. The light stops blinking
and automatically resets when you turn the key switch to the
O position when the fault has been resolved.
FF
position. Try starting the engine:
position, and allow the traction
FF
position. Start the
EUTRAL
position and move the traction
FF
position. Start the engine. While
position, and allow the
FF
position. Try
EUTRAL
(Figure
position, the controller
N
1. Diagnostic light
When the controller diagnostic light blinks, 1 of the following
problems has been detected by the controller:
•
An output has been shorted.
•
An output has an open circuit.
Use the diagnostic display to determine which output is
malfunctioning; refer to
(page 21).
If the diagnostic light does not come on when the key
switch is in the O position, this indicates that the electronic
N
controller is not operating. Possible causes are as follows:
•
The light is burned out.
•
The fuses are blown.
•
The electronic controller is not functioning correctly.
Check the electrical connections, input fuses, and diagnostic
light bulb to determine the malfunction. Ensure that the
loop-back connector is secured to the wire-harness connector.

Diagnostic Ace Display

The machine comes with an electronic controller which
controls most of the machine functions. The controller
determines what function is required for various input
switches (e.g., seat switch and key switch) 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.
Use the Diagnostic ACE display tool and overlay to help
verify and correct electrical functions of the machine. Contact
your Toro Distributor for assistance.
20
Figure 17
Checking the Interlock Switches