Yamaha YZF-R15, Service Manual

Page: 303 / 338

8-45
FUEL INJECTION SYSTEM
Fault code No. 16 Symptom Throttle position sensor is stuck.
Diagnostic code No. 01 Throttle position sensor
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Installed condition of throttle position
sensor. • Check for looseness or pinch-
ing.
• Check that the sensor is in-
stalled in the specified position.
2 Defective throttle position sensor. • Execute the diagnostic mode.
(Code No.01)
• Replace the throttle body if de-
fective.
Refer to “CHECKING THE
THROTTLE BODY SENSOR
ASSEMBLY” on page 8-72.
CAUTION:
Do not remove the throttle
body sensor assembly from
Fault code No. 21 Symptom Coolant temperature sensor-open or short circuit detect-
ed.
Diagnostic code No. 06 Coolant temperature sensor
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Installed condition of coolant tempera-
ture sensor Check the installed area for
looseness or pinching. Turning the
main switch
ON.
2 Connected state of connector
• Coolant temperature sensor coupler
• Main wire harness ECU coupler • 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.
3 Open or short circuit in wire harness
and/or sub lead. • Repair or replace if there is an
open or short circuit.
• Main wire harness
(black/blue–black/blue)
(green/red–green/red)
4 Defective coolant temperature sensor. • Execute the diagnostic monitor-
ing mode. (Code No.06)
• Replace if defective.
Refer to “CHECKING THE
COOLANT TEMPERATURE
SENSOR” on page 8-71.
8-46
FUEL INJECTION SYSTEM
Fault code No. 22 Symptom Intake air temperature sensor: open or short circuit de-
tected.
Diagnostic code No. 05 Intake air temperature sensor
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Connections
• Sensor module coupler.
• Main wire harness ECU coupler • Check the couplers for any pins
that may be pulled out.
• Check the locking condition of
the couplers.
• If there is a malfunction, repair it
and connect the coupler se-
curely.
Turning the
main switch
ON.
2 Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between throttle body sensor
assembly coupler and ECU
coupler.
(brown/white–brown/white)
(black/blue–black/blue)
3 Defective intake air temperature sen-
sor. • Execute the diagnostic mode.
(Code No.05)
• Replace the throttle body if de-
fective.
Refer to “CHECKING THE
THROTTLE BODY SENSOR
ASSEMBLY” on page 8-72.
CAUTION:
Do not remove the throttle
body sensor assembly from
the throttle body.
Turning the main
switch on then
open & close the
throttle valve.