Tec--5002 Controller - Toro Groundsmaster 4000-D Service Manual

TEC- -5002 Controller
Groundsmaster 4000--D machines use a Toro Electron-
ic Controller (TEC) to control the operation of the hy-
1
draulic cooling fan. The controller is attached to the
operator platform under the console housing cover (Fig.
32).
Logic power is provided to the controller as long as the
battery cables are connected to the battery. A 2 amp
fuse in a fuse holder near the battery provides circuit
protection for this logic power to the controller.
2
The TEC--5002 controller monitors the states of the fol-
lowing components as inputs: ignition switch, hydraulic
temperature sender, engine coolant temperature send-
er and cooling fan switch.
Figure 32
The TEC--5002 controller controls electrical output to
the engine cooling fan hydraulic valve solenoid coils 1. Fuses 2. TEC location
(speed and direction). Circuit protection for TEC--5002
outputs is provided by fuse F9 (7.5 amp).
Because of the solid state circuitry built into the TEC,
there is no method to test the controller directly. The con-
troller may be damaged if an attempt is made to test it
with an electrical test device (e.g. digital multimeter or
test light).
Groundsmaster 4000--D Page 5 - - 21 Electrical System