Sea-doo GTX Limited iS 255 2009, Shop Manual

Page: 375 / 555

Section 05 ELECTRICAL SYSTEM
Subsection 07 (GAUGE)
If the MODE switch is pressed, 2 diodes are by-
passed. The remaining two diodes in the circuit
drop 1.2 Vdc (at pin B).
If the SET switch is pressed, 1 diode is bypassed.
The remaining three diodes in the circuit drop 1.8
Vdc (at pin B).
The gauge senses these voltages through pin 17
of the gauge connector, and interprets them as
signals that tell it which switch is activated. The
same is true for the UP/DOWN arrow switches,
iS switches and VTS switches on their respective
circuits.
If the command generated by the closure of a
switch concerns another module, a circuit within
the gauge will translate it to CAN protocol and
transmit it through the CAN bus. The applicable
module will react to the command, carry out the
function, and transmit the result back through the
CAN bus.
The information center will use the signals from
the switches and the transmitted information
from the other modules, convert them to an in-
dication, and cancel the command signal it sent
out once the function has been carried out.
Command signals from the MODE and SET
switches are used by the information center
only. VTS and iS switch commands are translate
and sent to the modules. The UP/DOWN arrow
switch commands are used by the gauge for cer-
tain functions and settings only. The UP/DOWN
button command signals will also be translated
and sent out through the CAN bus to be used by
the ECM for the CRUISE and SLOW SPEED func-
tions (increasing or decreasing speed when the
functions are active), and by the iBR for iBR gate
positioning in SLOW SPEED mode of operation.
NOTE: The above stated voltages vary slightly de-
pending on the actual voltage applied to the circuit
and the current flow through the diodes. When
using a Fluke 115 multimeter for testing in diode
test mode, the voltage and current applied by the
multimeter are lower than in circuit. The quality
of probe contact, the actual probes and leads, and
the precision of the meter calibration will all affect
the results, which will most likely be slightly lower
than nominal values stated.
MODE/SET and UP/DOWN Arrow
Buttons Test Using B.U.D.S.
1. Connect the watercraft to the latest B.U.D.S.
software. Refer to
COMMUNICATION TOOLS
AND B.U.D.S. SOFTWARE
.
2. Press the START/STOP button to energize the
electrical system.
NOTE: You will need to press the START button
every three minutes or the electrical system will
shut off.
3. Select the Read Data button.
4. Choose the Monitoring tab at the top of the
page.
5. At the bottom LH side of the monitoring page,
select the Cluster tab.
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1. Read Data button
2. Monitoring tab
3. Cluster tab
4. Switch inputs field
6. Press each of the MODE/SET and UP/DOWN
arrow buttons and look for the applicable indica-
tor light to come on in the
Switch inputs field
on lower RH side of the cluster page (Mode ,
Set , UP or Down).
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SWITCH INPUTS
1. MODE/SET and UP/DOWN arrow button indicator lights
If each of the gauge button indicator lights come
on when the applicable switch is pressed, the
problem may be related to the information center.
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