Using The Tdm Display/Controller Screens For Troubleshooting - Toro Groundmaster Series Service Manual

Using the TDM Display/Controller Screens for
Troubleshooting
Troubleshooting: Cutting Unit (or attachment) Problems
The TDM display/controller Main Information Screens can be used to check
the operation of various components. The neutral, parking brake, cutting unit
lift/lower, seat, and glow plug (model 31902 and 31903) icons represent the
switch activity and can be used to verify the switch and its circuit wiring integrity.
The battery icon can be used to check battery voltage and circuit wiring integrity
when the engine is not running, and to check charging system activity and circuit
wiring integrity when the engine is running.
The TDM display/controller Diagnostics>Input/Output screens can be very helpful
when troubleshooting machine operation issues. Electrical components and their
circuit wiring can be evaluated quickly using the Input/Output screens prior to
testing the component individually. The Input/Output screens show the current
state of the inputs and the outputs required to allow the machine cutting unit
lift/lower, PTO, and engine operation to proceed. Refer to
(page 6–3) for a guide to the various TDM display/controller screens.
It may be necessary to start and run the engine, raise and lower
the cutting unit (or attachments), or otherwise operate the machine
during the troubleshooting process. Make sure the machine is
in a well ventilated area and keep away from the cutting unit (or
attachments) and all moving parts while troubleshooting to prevent
personal injury.
If a machine operation is malfunctioning, the following procedure can help
identify the component or circuit wiring causing the malfunction.
1. Park machine on a level surface, lower the cutting unit (or attachment) if
possible and stop engine.
2. Set the key switch to the R
3. Use the screen select button to navigate to the TDM display/controller
Diagnostics> Input/Output>Input screen for the desired machine operation.
Engine has been selected for this example.
Manually operate the input component. The component state on the input
display should alternate ON (check-mark in box) and OFF (empty box) as the
component is cycled. If ON and OFF do not alternate on the input display
while operating the component, the component or its circuit wiring is faulty
and should be tested; refer to
As an example; the neutral input should display ON (checked) while the
traction pedal is at rest. The input should display OFF (empty box) when the
traction pedal is pressed in either the forward or reverse direction. The input
should display ON (checked box) when the traction pedal is released. Based
on the input check boxes shown in this example (refer to
• the traction pedal is in Neutral
• the operator is sitting in the seat while testing the traction pedal
• the parking brake is disengaged
• the engine is not running
CAUTION
position.
UN
Testing the Electrical Components (page
Page 3–12
TDM Display/Controller
Figure 6):
Groundsmaster ® 3200, 3300 and 3310
19240SL Rev A
6–9).