Yamaha WR250R Service Manual page 318

Fault code No. 22
Diagnostic monitoring
code No.
Order Item/components and probable cause
1 Installed condition of intake air tempera-
ture sensor.
2 Connected state of connector
Intake air temperature sensor coupler
G
Main wire harness ECU coupler
G
3 Open or short circuit in wire harness and/
or sub lead.
4 Defective intake air temperature sensor.
Fault code No. 30
Diagnostic monitoring
code No.
Order Item/components and probable cause
1 The vehicle has overturned.
2 Installed condition of the lean angle sen-
sor
3 Connected state of connector
Lean angle sensor coupler
G
Main wire harness ECU coupler
G
4 Defective lean angle sensor.
Symptom Intake air temperature sensor-open or short circuit detected.
05 Intake air temperature sensor
Check or maintenance job
G
G
G
G
G
G
(Black/Blue–Black/Blue)
(Brown/White–Brown/White)
G
G
Refer to "CHECKING THE IN-
TAKE AIR TEMPERATURE SEN-
SOR" on page 8-80.
Latch up detected.
Symptom
No normal signal is received from the lean angle sensor.
08 Lean angle sensor
Check or maintenance job
G
G
G
G
G
G
G
8-47
FUEL INJECTION SYSTEM
Check the installed area for loose-
ness or pinching.
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 it securely.
Repair or replace if there is an
open or short circuit.
Between intake air temperature
sensor coupler and ECU coupler.
Execute the diagnostic monitoring
mode. (Code No.05)
Replace if defective.
Raise the vehicle upright.
Check the installed area for loose-
ness or pinching.
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 it securely.
Execute the diagnostic monitoring
mode. (Code No.08)
Replace if defective.
Reinstatement
method
Turning the main
switch ON.
Reinstatement
method
Turning the main
switch ON (how-
ever, the engine
cannot be
restarted unless
the main switch
is first turned
OFF).