Yamaha YFM70RY Service Manual page 330

Fault code No. 14
Diagnostic code No.
Order Item/components and probable
cause
1 Intake air pressure sensor hose.
2 Intake air pressure sensor malfunction
at intermediate electrical potential.
3 Connections
• Intake air pressure sensor coupler
• Main wire harness-ECU coupler
4 Defective intake air pressure sensor.
Symptom Intake air pressure sensor: hose line malfunction
(clogged or detached hose).
d03 Intake air pressure sensor
FUEL INJECTION SYSTEM
Check or maintenance job
• Check the intake air pressure
sensor hose condition.
• Repair or replace the sensor
hose.
• Check and repair the connec-
tion.
• Replace it if there is a malfunc-
tion.
• Check the coupler for any pins
that may have pulled out.
• Check the locking condition of
the coupler.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
• Execute the diagnostic mode.
(Code No. d03)
• Replace if defective.
Refer to "CHECKING THE IN-
TAKE AIR PRESSURE SEN-
SOR" on page 8-73.
8-41
Reinstatement
method
Starting the en-
gine and oper-
ating it at idle.