Service Manual

Reelmaster 7000
Page 5 - 35
Electrical System
Toro Electronic Controller (TEC)
The Reelmaster 7000 uses a Toro Electronic Controller
(TEC) to monitor the condition of various switches (in-
puts) and then directs power output to allow certain ma-
chine functions. The controller is located under the
operator seat (Fig. 49). The handheld Diagnostic Dis-
play (see Special Tools in this chapter) with the correct
overlay should be used when checking inputs and out-
puts of the controller used on your Reelmaster (see
Troubleshooting in this chapter).
Logic power is provided t o the controller as long as the
battery cables are connected to the battery. A 2 amp
fuse (F3- 1) provides circuit protection for this logic pow-
er to the controller.
Inputs from the ignition, traction neutral, parking brake,
PTO, seat, cutting unit lift, mow/transport, engine cool-
ing fan, backlap, reel position, hydraulic temperature,
engine oil pressure and engine coolant switches are all
monitored by the controller.
Current output to the mow circuit hydraulic valve sole-
noid coils, lift circuit hydraulic valve solenoid coils and
engine components (glow plug relay, start relay, fuel
pump and engine run solenoid) are controlled based on
the inputs received by the controller. Circuit protection
for the TEC outputs is provided by three (3) 7.5 amp
fuses (F3- 2, F3- 3 and F3- 4).
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 9 - 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). The connection terminal functions for
the TEC controller is shown in Figure 50.
Because of the solid state circuitry built into the control-
ler, there is no method to test the controller directly. The
controller may be damaged if an attempt is made to test
it with an electrical test device, such as a digital multime-
ter.
IMPORTANT: Before performing any welding on the
machine, disconnect both positive and negative
battery cables from the battery, disconnect the wire
harness connector from the TEC controller and dis -
connect the terminal connector from the alternator.
This will prevent damage to the electrical system of
your Reelmaster.
1. TEC controller
Figure 49
1
Figure 50
12V POWER
(7.5A FUSES)
12V LOGIC
IGNITION
SWITCH
INPUTS
DIGITAL
INPUTS
(OPEN/
ANALOG
INPUTS
POWER
(2 AMP FUSE)
CLOSED)
(VARIABLE)
+5 VOLTAGE
OUT
COMM
PORT
OUTPUTS
(PWR 2)
GROUND
OUTPUTS
(PWR 3)
OUTPUTS
(PWR 4)
TEC- 5002
Electrical
System