Yamaha YZFR1W 2007 Service Manual page 369

Fault code No. 21
Diagnostic code No.
Orde Item/components and probable
r cause
1 Connections
• Coolant temperature sensor coupler
• Main wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Defective coolant temperature sensor. • Execute the diagnostic mode.
Fault code No. 22
Diagnostic code No.
Orde Item/components and probable
r cause
1 Connections
• Air temperature sensor coupler
• Main wire harness ECU coupler
2 Open or short circuit in wire harness.
3 Defective air temperature sensor.
Coolant temperature sensor: open or short circuit
Symptom
detected.
06 Coolant temperature sensor
Check or maintenance job
• Check the coupler for any pins
• Check the locking condition of
• If there is a malfunction, repair it
• Repair or replace if there is an
• Between coolant temperature
• Replace if defective.
Symptom Air temperature sensor: open or short circuit detected.
05 Air temperature sensor
Check or maintenance job
• Check the coupler for any pins
• Check the locking condition of
• If there is a malfunction, repair it
• Repair or replace if there is an
• Between air temperature sensor
• Execute the diagnostic mode.
• Replace if defective.
8-50
FUEL INJECTION SYSTEM
that may have pulled out.
the couplers.
and connect the coupler
securely.
open or short circuit.
sensor coupler and ECU cou-
pler.
(Green/White–Green/White)
(Black/Blue–Black/Blue)
(Code No.06)
Refer to "CHECKING THE
COOLANT TEMPERATURE
SENSOR" on page 8-96.
that may have pulled out.
the coupler.
and connect the coupler
securely.
open or short circuit.
coupler and ECU coupler.
(Brown/White–Brown/White)
(Black/Blue–Black/Blue)
(Code No.05)
Refer to "CHECKING THE
INTAKE AIR TEMPERATURE
SENSOR" on page 8-99.
Reinstatement
method
Reinstated
automatically if
a normal signal
is received.
Reinstatement
method
Reinstated
automatically if
a normal signal
is received.