Check Interlock Switches; Verify Output Functions - Toro Reelmaster 5500-D Service Manual

Check Interlock Switches

The purpose of the interlock switches is to prevent the
engine from cranking or starting unless the traction ped-
al is in NEUTRAL, the Enable / Disable switch is in DIS-
ABLE and the Lower Mow / Raise control is in the neutral
position. The engine will stop when the traction pedal is
depressed with operator off the seat. In addition, the en-
gine will stop if the traction pedal is depressed and the
parking brake is engaged.
The interlock switches are for the protection of
the operator and bystanders and to ensure cor-
rect operation of the machine. Do not bypass or
disconnect switches. Check operation of the
switches daily to make sure the interlock system
is operating properly. If a switch is defective, re-
place it before operating. Do not rely on safety
switches entirely - use common sense!
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
connectors near controller. Carefully unplug loop back
connector from harness connector.
3. Connect the Diagnostic ACE display connector to
the harness connector. Make sure correct overlay decal
is positioned on Diagnostic ACE display.
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 the toggle button on
Diagnostic ACE to change to "inputs displayed" LED.
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 defec-
tive switches and repair any defective wiring.
Electrical System (Rev. C)
CAUTION
1. Diagnostic ACE
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.

Verify Output Functions

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
connectors near controller. Carefully unplug loopback
connector from harness connector.
3. Connect the Diagnostic ACE connector to the har-
ness connector. Make sure correct overlay decal is posi-
tioned on Diagnostic ACE.
4. Turn the key switch to the ON position, but do not
start machine.
5. The "outputs displayed" LED, on lower right column
of Diagnostic ACE, should be illuminated. If "inputs dis-
played" LED is illuminated, press the toggle button on
the Diagnostic ACE to change the LED to "outputs dis-
played".
Note: It may be necessary to toggle between "inputs
displayed" and "outputs displayed" several times to do
the following step. To toggle back and forth, press toggle
button once. This may be done as often as required. Do
not hold button.
6. Sit on seat and attempt to operate the desired func-
tion of the machine. If you need help verifying the correct
input settings for each function, see Logic Chart. The
appropriate output LED's should illuminate to indicate
that the ECU is turning on that function.
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Figure 7
2. Loopback connector
Reelmaster 5500-D