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Multi Pro 5700--DPage 7.1 -- 24Sonic Boom System (Optional Kit)
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. 12).
Power is provided to the ECU when the vehicle ignition
switch is ON. A 5 amp fuse providescircuit 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 compo-
nents as inputs: thesonic 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 s ix (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 itwith an electrical
test device (e.g. digital multimeter or test light).
IMPORTANT: Before performing welding on the ma-
chine, disconnect both cables from the battery and
disconnect wire harness connector from the ECU.
These steps will prevent damage to the machine
electrical system.
1. Mount plate
2. Electronic control unit
3. Sonic boom fuse block
4. Relay (6 used)
Figure 12
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