Yamaha YZF-R125, Service Manual

Page: 316 / 356

FUEL INJECTION SYSTEM
8-45
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 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 8-73.
CAUTION:
ECA5D71011
Do not remove the throttle
body sensor assembly from
the throttle body.
Starting the en-
gine, operating
it at idle, then
by racing it.
Fault code No. 19 Symptom A break or disconnection of the blue/yellow lead of the
ECU is detected.
Diagnostic code No. 20 Sidestand switch
Order Item/components and probable
cause
Check or maintenance job Reinstatement
method
1 Connections
• Wire harness ECU coupler • Execute the diagnostic mode.
(Code No.20)
• 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.
Reconnect the
wiring and re-
tract the side-
stand.
2 Open or short circuit in wire harness. • Repair or replace if there is an
open or short circuit.
• Between ECU and blue/yellow
lead.
3 Defective sidestand switch. • Replace if defective.
Refer to “CHECKING THE
SWITCHES” on page 8-59.
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