Multi Pro 1200/1250 Page 9 -- 17 Sonic Boom System (Optional Kit)
Diagnostic Display
The Sonic Boom System is equipped with an electronic
control unit (ECU) which controls machine sonic boom
electrical functions. The ECU monitors various input
switches(e.g.boomactuatorswitches,sonicboomsen-
sors) and energizes outputs to actuate relays for ap-
propriate machine functions.
For the ECU to control the machine as desired, each of
the inputs (switches and sensors) and outputs (relays)
must be connected and functioning properly.
The Diagnostic Display (see Special Tools in this chap-
ter)isatooltohelpthetechnicianverifycorrectelectrical
functions of the machine.
IMPORTANT: The Diagnostic Display must not be
left connected to the machine. It is not designed to
withstand the environment of the machine’s every
dayuse.WhenuseoftheDiagnosticDisplayiscom-
pleted, disconnect it from the machine and recon-
nectloopbackconnectortoharnessconnector.The
machine will not operate without the loopback con-
nector installed on t he harness. Store the Diagnos-
tic Display in a dry, secure, indoor location and not
on machine.
Verify Diagnostic Display Input Functions
1. Park vehicle on a level surface, stop the engine and
apply the parking brake.
2. Locate Sonic Boom wire harness communication
port and loopback connector under the vehicle dash
panel. Carefully unplug loopback connector from har-
ness connector.
3. Connect the Diagnostic Display connector to the
wire harness connector. Make sure correct overlay de-
cal is positioned on the Diagnostic Display (Fig. 7).
4. Turn the vehicle ignition switch to the ON position,
but do not start vehicle.
NOTE: The red text on the Diagnostic D isplay overlay
decal refers to input switches and the green text refers
to ECU outputs.
5. Make sure that the “INPUTS DISPLAYED” LED, on
lower right column of the Diagnostic Display, is illumi-
nated. If “OUTPUTS DISPLAYED” LED is illuminated,
press the toggle button on the Diagnostic Display to
change to “INPUTS DISPLAYED” LED.
CAUTION
When testing ECU inputs with the Diagnostic
Display,boomactuatorsmay beenergizedcaus-
ing the spray booms to move. Be cautious of po-
tentialsprayer component movement whileveri-
fying inputs with the Diagnostic Display.
6. The D iagnostic Display will illuminate the LED
associatedwitheachoftheinputswhenthatinputswitch
isclosed.Individually,changeeachoftheswitchesfrom
opentoclosed(e.g.togglesonicmodeswitch),andnote
that the appropriate LED on the Diagnostic Display will
illuminatewhenthecorrespondingswitchisclosed.Re-
peat on each switch that is possible to be changed by
hand (see Inputs and LED Operation chart on following
page).
7. If appropriate LED does not toggle on and off when
switch state is changed, check all wiring and connec-
tions to that switch and/or test switch. Replace any de-
fective switches and repair any damaged wiring.
8. After input functions testing is complete, disconnect
theDiagnosticD isplay connectorfromtheharnesscon-
nector and plug loopback connector into wire harness.
Figure 7
Sonic Boom
System
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