Yamaha FX10X 2008, Service Manual

Page: 287 / 411

7-11
FI
FUEL INJECTION SYSTEM
Diagnostic mode table
Switch the meter display from the regular mode to the diagnostic mode. To switch the display, refer to “DIAG-
NOSTIC MODE”.
NOTE:
• Check the intake air temperature and coolant temperature as close as possible to the intake air temperature
sensor and the coolant temperature sensor respectively.
• If it is not possible to check the intake air temperature, use the ambient temperature as reference.
Diagnostic
code No.
Item Description of action
Data displayed on meter
(reference value)
01
Throttle angle Displays the throttle angle.
• Check with throttle fully closed.
• Check with throttle fully open. 0 ~ 125 degrees
• Fully closed position (15 ~ 18)
• Fully open position (94 ~ 100)
03
Intake air pressure sensor
1 (atmospheric pressure
and intake air pressure) Displays the intake air pressure for cylinders #1, #2, and
#3. • Not cranking: atmospheric
pressure
• Cranking: intake air pressure
decreases to less than the
atmospheric pressure.
04
Intake air pressure sensor
2 (atmospheric pressure
and intake air pressure) Displays the intake air pressure for cylinder #1. • Not cranking: atmospheric
pressure
• Cranking: intake air pressure
decreases to less than the
atmospheric pressure.
05
Intake air temperature Displays the intake air temperature.
• Check the temperature in the air filter case. Compare it to the value dis-
played on the meter. (Minimum
displayed value: –30 [°C])
06
Coolant temperature Displays the coolant temperature.
• Check the temperature of the coolant. Compare it to the value dis-
played on the meter. (Minimum
displayed value: –30 [°C])
07
Snowmobile speed pulse Displays the cumulative number of snowmobile pulses
that are generated when the track is spun. (0 ~ 999; resets to 0 after 999)
OK if the numbers appear on
the meter.
09
Fuel system voltage (bat-
tery voltage) Displays the fuel system voltage (battery voltage). 0 ~ 18.7 V
Normally, approximately 12.0 V
24
Throttle switch Displays that the switch is on or off. Throttle open: on
Throttle closed: off
26
Grip warmer operation If the grip warmer side of the grip/thumb warmer adjust-
ment switch is pushed, actuates the grip warmer and
displays the self-diagnosis warning indicator for 120 sec-
onds. —
27
Thumb warmer operation If the grip warmer side of the grip/thumb warmer adjust-
ment switch is pushed, actuates the thumb warmer and
displays the self-diagnosis warning indicator for 120 sec-
onds. —
30
Cylinder-#1 ignition coil If the grip warmer side of the grip/thumb warmer adjust-
ment switch is pushed, actuates the cylinder-#1 ignition
coil and displays the self-diagnosis warning indicator
(five times at one-second intervals). After pushing the switch, check
that a spark is produced five
times.
31
Cylinder-#2 ignition coil If the grip warmer side of the grip/thumb warmer adjust-
ment switch is pushed, actuates the cylinder-#2 ignition
coil and displays the self-diagnosis warning indicator
(five times at one-second intervals). After pushing the switch, check
that a spark is produced five
times.
32
Cylinder-#3 ignition coil If the grip warmer side of the grip/thumb warmer adjust-
ment switch is pushed, actuates the cylinder-#3 ignition
coil and displays the self-diagnosis warning indicator
(five times at one-second intervals). After pushing the switch, check
that a spark is produced five
times.
36
Injector #1 If the grip warmer side of the grip/thumb warmer adjust-
ment switch is pushed, actuates injector #1 and displays
the self-diagnosis warning indicator (five times at one-
second intervals). After pushing the switch, check
that the injector operates five
times by listening to its operat-
ing sound.