Troubleshooting
For effective troubleshooting and repairs, there must be
a good understanding of the electrical circuits and com-
ponents used on this machine (see Chapter 9 -- Electri-
cal Diagrams).
CAUTION
Remove all jewelry, especially rings and
watches, before doing any electrical trouble-
shooting or testing. Disconnect the battery
cables unless the test requires battery voltage.
If the machine has any interlock switches by--passed,
reconnect the switches for proper safety and trouble-
shooting.
NOTE: Use the Diagnostic Display (see Special Tools
in this chapter) to test Electronic Control Module inputs
and outputs when troubleshooting an electrical problem
on your Groundsmaster.
Diagnostic Display
Groundsmaster 4500--D and 4700--D machines are
equipped with one (GM 4500--D) or two (GM 4700--D)
Toro Electronic Controllers (TEC) which control ma-
chine electrical functions. The controllers monitor vari-
ous input switches (e.g. ignition switch, seat switch,
neutral switch) and energize outputs to actuate sole-
noids or relays for the requested machine function.
Verify Diagnostic Display Input Functions
1.
decks, stop the engine and apply the parking brake.
Park machine on a level surface, lower the cutting
2.
Remove plate in front of seat to allow access to wire
harness loop back connector. Locate wire harness and
loop back connector (Fig. 8). Carefully unplug loop back
connector from harness connector.
For the TEC to control the machine as desired, each of
the inputs (switches and sensors) and outputs (sole-
noids and relays) must be connected and functioning
properly.
3.
Connect the Diagnostic Display connector to the
wire harness connector. Make sure correct overlay de-
cal is positioned on the Diagnostic Display (Figs. 9 and
10).
The Diagnostic Display (see Special Tools in this chap-
ter)isatooltohelpthetechnicianverifycorrectelectrical
functions of the machine.
4.
Turn the ignition switch to the ON position, but do not
start machine.
IMPORTANT: The Diagnostic Display must not be
left connected to the machine. It is not designed to
withstand the environment of the machine’s every
dayuse.WhenuseoftheDiagnosticDisplayiscom-
pleted, disconnect it from the machine and recon-
nect loopback connector to harness connector.The
machine will not operate without the loopback con-
nector installed on the harness. Store the Diagnos-
tic Display in a dry, secure, indoor location and not
on machine.
NOTE: The red text on the Diagnostic Display overlay
decal refers to input switches and the green text refers
to TEC outputs.
3
1
CAUTION
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 the operation of the
interlockswitchesdailyforproperoperation.Re-
place any malfunctioning switches before oper-
ating the machine.
2
Figure 8
1.
2.
Wire harness connector
Loop back connector
3. Diagnostic display
Electrical System
Page 5 -- 6
Groundsmaster 4500--D/4700--D
| Categories | Lawn Mower Manual, Sprinkler and Irrigation Manuals, Toro Sprinkler and Irrigation Manuals |
|---|---|
| Tags | Toro Groundsmaster 30857, Toro Groundsmaster 30858, Toro Groundsmaster 4500 D, Toro Groundsmaster 4700 D |
| Download File |
|
| Document Type | Service Manual |
| Language | English |
| Product Brand | Toro. Customer Service Representatives are available by phone:
Monday - Friday 7:30 a.m. to 9:00 p.m. (CDT) - Saturday 8:00 a.m. to 8:00 p.m. (CDT) - Sunday 10:00 a.m. to 8:00 p.m. (CDT)
Canada 1-888-225-4886 USA 1-888-384-9939, Lawn Mower |
| Document File Type | |
| Publisher | toro.com |
| Wikipedia's Page | Toro Company |
| Copyright | Attribution Non-commercial |
(0 votes, average: 0 out of 5)