Yamaha YFM70RY Service Manual page 333

Fault code No. 22
Diagnostic code No.
Order Item/components and probable
cause
1 Installed condition of intake air tem-
perature sensor.
2 Connections
• Intake air temperature sensor cou-
pler
• Main wire harness-ECU coupler
3 Open or short circuit in wire harness.
4 Defective intake air temperature sen-
sor.
Fault code No. 30
Diagnostic code No.
Order Item/components and probable
cause
1 The vehicle has overturned.
2 Installed condition of the lean angle
sensor.
3 Connections
• Lean angle sensor coupler
• Main wire harness-ECU coupler
4 Defective lean angle sensor.
Symptom Intake air temperature sensor: open or short circuit de-
tected.
d05 Intake air temperature sensor
Symptom The vehicle has overturned.
d08 Lean angle sensor
FUEL INJECTION SYSTEM
Check or maintenance job
Check for looseness or pinching. Turning the
• 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.
• Repair or replace if there is an
open or short circuit.
• Between intake air temperature
sensor coupler and ECU cou-
pler.
(black/white–black/blue)
(brown/white–brown/white)
• Execute the diagnostic mode.
(Code No. d05)
• Replace if defective.
Refer to "CHECKING THE IN-
TAKE AIR TEMPERATURE
SENSOR" on page 8-73.
Check or maintenance job
Raise the vehicle upright.
Check for looseness or pinching.
• Check the coupler for any pins
that may be 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. d08)
• Replace if defective.
Refer to "CHECKING THE
LEAN ANGLE SENSOR" on
page 8-68.
8-44
Reinstatement
method
main switch to
"ON".
Reinstatement
method
Turning the
main switch to
"ON" (however,
the engine can-
not be restarted
unless the main
switch is first
turned "OFF").