FUEL INJECTION SYSTEM
TIP
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Information about each diagnostic code number is organiz
ed
in this manual
as
follows:
• If a diagnostic code number has a correspondi
ng
fault code number, the information is shown in
"TROUBLESHOOTING DETAILS". (Refer to "TROUBLESHOOTING DETAILS"
on
page 8·38.)
• If a diagnostic code number does not have a corresponding fault code number, the information is
shown in "DIAGNOSTIC CODE TABLE". (Refer to "SELF-DIAGNOSTIC FUNCTI
ON
AND DIAG·
NOSTIC CODE TABLE" on page 9-5.)
9. Connect the wi
re
ha
rn
ess coupl
er
to the fuel pump.
EA
$1
A
CH
ll
2
YAMAHA
DIAGNOSTIC TOOL
This model uses the Yamaha diagnostic tool to identify malfunctions.
For information about
us
ing the Yamaha diagnostic tool, refer to the operation manual that is included
with the tool.
Yamaha
diagnostic
tool
90890-03215
Features
of
the Yamaha diagnostic tool
You can use the Yamaha diagnost
ic
tool to identify
ma
lfunctions quicker than wi
th
conventiona
l·
methods.
By connecting the adapter interface, which is connected to the USB port of a computer, to a vehicle's
ECU using the communication cabl
e,
you can displ
ay
information that is necessary for
id
enti
fy
ing mal-
functions and for
ma
intenance to display on the computer. The displayed information includes the sen·
sor output data and information recorded in the ECU.
Functions of the Yamaha diagnostic tool
Fault diagnosis mode:
Function diagnostic mode:
Inspection mode:
CO adjustment mode:
Monitori
ng
mode:
Logging mode:
View log:
ECU rewrite:
Fault codes recorded
on
the ECU are read, and the contents are
displayed.
The
fr
eeze frame data (FFD) is the operation data when a
ma
l·
function was detected. This data
can
be used to identify when
the malfuncti
on
occurred and check the engine conditions and
running conditions when it occurred.
Check the operation
of
the output value
of
each sensor and actu-
ator.
Determine whether each sensor or actuator is functioning prop-
erly.
Adjust the concentrati
on
of
CO admissions during idling.
Displays a graph
of
sensor output valu
es
for
ac
tual operating
conditions.
Records and saves the sensor output value in
ac
tual d
ri
ving con-
ditions.
Displays the logging
da
ta.
If necessary, the ECU is rewritten using ECU rewrite data pro-
vided by Yamaha.
Ignition timing adjustment, etc. cannot
be
changed from the veh
i-
cle's original state.
However, the diagnostic tool cannot
be
used to
fr
eely change the basic vehicle functions, such
as
ad·
justing t
he
ignition timi
ng
.
Connecting the Yamaha diagnostic tool
Remove the protective
cap
"1
",
and then connect the Yamaha diagnostic tool "2" to the coupler.
8-37
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