Toro 03530 Operator's Manual page 23

ate LED on Diagnostic ACE will blink on and
off when corresponding switch is closed. Repeat
on each switch that it is possible to be changed
by hand.
7. If the switch is closed and the appropriate LED
does not turn on, check all wiring and connec-
tions to the switch and/or check the switches
with an ohm meter. Replace any defective
switches and repair any defective wiring.
The Diagnostic ACE also has the ability to detect
which output solenoids or relays are on. This is a
quick way to determine if a machine malfunction is
electrical or hydraulic.
To verify output function:
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 controller.
Carefully unplug the loopback connector from
the harness connector. Set the height-of-cut
selector knob to position "A".
3. Connect the Diagnostic ACE connector to the
harness connector. Make sure the correct over-
lay decal is positioned on the Diagnostic ACE.
4. Turn the key switch to the ON position, but do
not start the machine.
Note: The red text on the overlay decal refers to
input switches and the green text refers to out-
puts.
5. The "outputs displayed" LED, on the lower-
right column of the Diagnostic ACE, should be
illuminated. If the "inputs displayed" LED is
illuminated, press the toggle button, on the
Diagnostic ACE to change the LED to "outputs
displayed".
Note: It may be necessary to toggle between
"inputs displayed" and "outputs dis-
played" several times to do the following
step. To toggle back and forth, press the
toggle button once. This may be done as
often as required. DO NOT HOLD THE
BUTTON.
6. Sit on the seat and attempt to operate the desired
function of the machine. The appropriate output
LED's should illuminate to indicate that the
ECU is turning on that function.
Note: If any output LED is blinking, this indi-
cates an electrical problem with that
OUTPUT. Repair / replace defective
electrical parts immediately. To reset a
blinking LED, turn the key switch
"OFF", then back "ON".
If no output LED's are blinking, but the correct out-
put LED's do not illuminate, verify that the required
input switches are in the necessary positions to allow
that function to occur. Verify correct switch function.
If the output LED's are on as specified, but the
machine does not function properly, this indicates a
non-electrical problem. Repair as necessary.
Note: Due to electrical system constraints, the output
LED's for "START", "PREHEAT" and
"ETR/ALT" may not blink even though an elec-
trical problem may exist for those functions. If
the machine problem appears to be with one of
these functions, be certain to check the electrical
circuit with a volt / ohm meter to verify that no
electrical problem exists to these functions.
If each output switch is in the correct position and
functioning correctly, but the output LED's are not
correctly illuminated, this indicates an ECU problem.
If this occurs, contact your Toro Distributor for assis-
tance.
IMPORTANT: The Diagnostic ACE display must
not be left connected to the machine. It is not
designed to withstand the environment of the
machine's every day use. When done using
Diagnostic ACE, disconnect it from the machine
and reconnect loopback connector to harness con-
nector. Machine will not operate without loop-
back connector installed on harness. Store
Diagnostic ACE in dry, secure location in shop,
not on machine.
Operating Instructions
23