caution - Toro

Electronic Control Unit (ECU)
The Sonic Boom System uses an electronic control unit
(ECU) to control electrical system operation. The ECU
is attached to a mounting plate under the vehicle dash
panel (Fig. 33).
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Power is provided to the ECU when the vehicle ignition
switch is ON. A 5 amp fuse provides circuit protection for
this logic power to the ECU. The fuse is located in the
Sonic Boom System fuse block.
The ECU monitors the states of the following components
as inputs: the sonic mode switch, the two (2) boom
actuator switches and the two (2) boom sonic sensors.
The ECU controls electrical output to the sonic boom
light and the six (6) relays that are part of the Sonic
Boom System. Circuit protection for the ECU outputs is
provided by a 10 amp fuse located in the Sonic Boom
System fuse block.
Because of the solid state circuitry built into the ECU,
there is no method to test it directly. The ECU may be
damaged if an attempt is made to test it with an electrical
test device (e.g. digital multimeter or test light).
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1. Mount plate
2. Electronic control unit
Figure 33
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3. Sonic boom fuse block
4. Relay (6 used)
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IMPORTANT: Before performing welding on the machine,
disconnect both cables from the battery and
disconnect wire harness connector from the ECU.
These steps will prevent damage to the machine
electrical system.
Sonic Boom System (Optional Kit)
Page 8.1 - 24
Rev. C Multi Pro 1200/1250