Toro Groundsmaster 4000-D Service Manual page 241

IMPORTANT: When testing for wire harness con-
tinuity at the connector for the TEC controller, take
care to not damage the connector pins with multi-
meter test leads. If connector pins are enlarged or
damaged during testing, connector repair will be
necessary for proper machine operation.
The machine electrical schematic and wire harness
drawings in Chapter 10 -- Foldout Drawings can be used
to identify possible circuit problems between the control-
lers and the input/output devices (e.g. switches and
solenoid coils).
Because of the solid state circuitry built into the TEC
controllers, there is no method to test a controller direct-
ly. A controller may be damaged if an attempt is made
to test it with an electrical test device (e.g. digital multi-
meter or test light).
If removal of the TEC controllers is necessary, label the
controllers to make sure they are properly connected to
the machine. The two (2) TEC controllers are visually
identical but they have different software and therefore
cannot be interchanged. The power mount (item 5 in
Fig. 64) can be separated from the operator platform
and carefully lifted from the platform to access the con-
troller fasteners.
NOTE: The TEC controllers used on the Groundsmas-
ter 4000--D and 4010--D are matched for correct ma-
chine operation. If either of these components are
replaced for any reason, system software needs to be
reprogrammed by your Toro Distributor.
IMPORTANT: Before performing any welding on
your Groundsmaster, disconnect both positive and
negative battery cables from the battery, disconnect
the wire harness connector from both of the TEC
controllers and disconnect the terminal connector
from the alternator. Also, disconnect and remove
the engine ECU from the machine before welding.
These steps will prevent damage to the machine
electrical system.
Groundsmaster 4000--D/4010--D
12V POWER
(7.5A FUSES)
12V LOGIC
POWER
(2 AMP FUSE)
VOLTAGE
OUT
IGNITION
SWITCH
INPUTS
DIGITAL
INPUTS
(OPEN/
CLOSED)
ANALOG
INPUTS
(VARIABLE)
WIRE HARNESS CONNECTOR FOR
TEC CONTROLLERS
41
31
21
11
1
Page 5 - - 51
OUTPUTS
OUTPUTS
OUTPUTS
COMM
PORT
CAN BUS
GROUND
Figure 66
50
40
NOTE TAB
10
POSITION
Figure 67
Electrical System
(PWR 2)
(PWR 3)
(PWR 4)
30
20