Troubleshooting (Gr3200); Ace Troubleshooting Guide (Gr3200) - Toro Greensmaster 3200 Service Manual

Troubleshooting (GR3200)

For all electrical problems, use ACE Troubleshoot-
ing Guide. The handheld Diagnostic ACE display al-
lows electrical problems to be found quickly.

ACE Troubleshooting Guide (GR3200)

Diagnostic Light
The GR 3200 is equipped with a diagnostic light that in-
dicates if the Electronic Controller Unit (ECU) is func-
tioning correctly. This light is green, and it is located
under the seat and on the bracket supporting the fuse
block. The diagnostic light will be on when the ECU is
functioning correctly and the ignition switch is to the ON
position. The light will flash if the ECU detects any of the
following malfunctions in the electrical system (Fig. 5):
1. An electrically "open" condition.
2. An electrically "shorted" condition.
3. There is an over temperature condition in the
ECU circuitry.
Figure 5
Diagnostic ACE Display
The GR 3200 is equipped with an ECU that controls
most of the machine functions. The controller deter-
mines which function is required for various input switch
conditions (i.e. seat switch, ignition switch, etc.) by pro-
ducing various outputs to actuate solenoids or relays.
Each of the input switches, output solenoids, and relays
must be connected and functioning properly for the ECU
to properly control the machine.
The Diagnostic ACE display will help the user verify cor-
rect electrical functions of the machine.
Electrical System
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If any interlock switches are by–passed, they must be
reconnected for proper troubleshooting and safety.
Figure 6
Verify Input Function (Fig. 6)
1. Park machine on a level surface, lower the cutting
units, stop the engine and engage the parking brake.
2. Lift up the seat. Locate wire harness and loopback
connector. Carefully unplug loopback connector from
harness connector.
3. Connect Diagnostic ACE display connector to the
harness connector. Make sure correct overlay decal is
positioned on Diagnostic ACE display.
4. Turn Ignition switch to ON; do not start machine.
Note: The red text on the overlay decal refers to input
switches and the green text refers to output switches.
5. The Inputs Displayed LED on lower right column of
the Diagnostic ACE should be lighted. If the Outputs Dis-
played LED is lighted, press and release Toggle Input/
Output button on Diagnostic ACE to change to the
Inputs Displayed LED. Do not hold button down.
Note: The Diagnostic ACE will illuminate a LED
associated with each input when its associated input
switch is closed.
6. Change each switch individually from open to
closed (i.e., sit on seat, engage traction pedal, etc.).
A. Observe that the appropriate LED on Diagnostic
ACE blinks on and off when its corresponding
switch is opened and closed.
B. Check each switch that can be actuated by
hand.
7. If switch is closed and appropriate LED does not
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Greensmaster 3200/3200–D