Toro GROUNDSMASTER 580-D 30581 Operator's Manual page 22

Operation
1. Electronic controller light
When the controller diagnostic light blinks, one of the
following outputs has been detected in the controller:
1. One of the outputs has been shorted.
2. One of the outputs is open circuited.
Using the diagnostic display, determine which output is
malfunctioning; refer to Checking Interlock Switches.
If the diagnostic light is not illuminated when the key
switch is in the ON position, this indicates that the
electronic controller is not operating. Possible causes are:
1. The loopback is not connected.
2. Fuses are blown.
3. The light is burned out.
4. Not functioning correctly.
5. Fusible links are blown
Check electrical connections, input fuses and the diagnostic
light bulb to determine malfunction. Make sure the
loopback connector is secured to the wire harness
connector.
Note: If the diagnostic light flashes during normal operation
of the machine, do not turn off the machine, toggle to the
output and touch any switch. The LED will flash, indicating
the source of the failure.
DIAGNOSTIC ACE DISPLAY
The GM 580-D is equipped with an electronic controller
that controls most machine functions. The controller
determines which 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
22
Figure 26
relays must be connected and functioning properly.
The Diagnostic ACE display is a tool to help the user verify
the correct electrical functions of the machine.
CHECKING INTERLOCK
SWITCHES
The purpose of the interlock switches is to prevent the
engine from cranking or starting, unless the traction pedal is
in NEUTRAL, to ensure the cutting units disengage when
raised or when the operator leaves the seat. In addition, the
engine will stop when the traction pedal is depressed when
the operator is not seated.
To verify interlock switch function:
CAUTION
The interlock switches are for the protection of the
operator and bystanders, and to ensure correct
operation of the machine, so do not bypass or
disconnect them. Check operation of the switches
daily to assure the interlock system is operating. If a
switch is defective, replace it before operating. The
controller has the ability to detect bypassed switches
and may prevent the operation of the machine if
switches are bypassed. Do not rely entirely on safety
switches—use common sense.
1. Park the machine on a level surface, lower the
cutting units, stop the engine and engage the
parking brake.
2. Open the control panel cover. Locate the wire
harness and connectors near the controller.
Carefully unplug the loopback connector from the
harness connector (Fig. 27).