Yamaha FX10X 2008, Service Manual

Page: 282 / 411

7-6
FI
FUEL INJECTION SYSTEM
TROUBLESHOOTING CHART
Engine operation is not normal or the warning light and self-diagnostic warning indicator on the LCD flash.
* The warning light and self-diagnostic warning indicator on the LCD may not flash even if the engine operation is
not normal.
The warning light and self-diagnostic warning indica-
tor on the LCD flash.
Check the fault code number displayed on the meter.
Identify the system with the malfunction. (Refer to
“Self-Diagnostic-Function table”.)
Identify the probable cause of the malfunction. (Refer
to “Fault code table”.)
Check and repair the probable cause of the malfunction.
Fault code No. No fault code No.
Check and repair.
(Refer to “TROUBLE-
SHOOTING
DETAILS”.)
Monitor the operation of
the sensors and actua-
tors in the diagnostic
mode. (Refer to “Diag-
nostic mode table”.) Check and repair.
Perform the fuel injection system reinstatement
action. (Refer to “Reinstatement method” in “TROU-
BLESHOOTING DETAILS”.)
Turn the main switch off, turn the main switch back
on, and then check if the fault code number is still dis-
played.
Repairs completed
Fault code number not displayed
Erasing the malfunction history:*
The malfunction history is stored even if the main switch is turned off.
The malfunction history must be erased in the diagnostic mode. (Refer to the “Diagnostic mode table (Diagnostic code
No. 62)”.)
* Operated when the warning light
and self-diagnosis warning indicator
flash.
The warning light and self-diagnostic warning indica-
tor on the LCD does not flash.
Check the operation of the following sensors and
actuators in the diagnostic mode. (Refer to “Diagnos-
tic mode table”.)
01: Throttle position sen-
sor (throttle angle)
03, 04:Intake air pres-
sure
05: Intake air tempera-
ture
06: Coolant temperature
07: Snowmobile speed
pulse
09: Fuel system voltage
(battery voltage)
30: Cylinder-#1 ignition
coil
31: Cylinder-#2 ignition
coil
32: Cylinder-#3 ignition
coil
36: Injector #1
37: Injector #2
38: Injector #3
Engine malfunction
Defective sensor or
actuator
Check and repair the
inner parts of the
engine. (Refer to
CHAPTER 5.)
Check and repair the
corresponding sen-
sor or actuator.
Check the engine condition.
Fault code number
displayed
OK NG
NG
OK
OK OK