Yamaha R15 2022 Service Manual page 397

FUEL INJECTION SYSTEM TROUBLESHOOTING
Fault code No.
Item
4 Installed condition of throttle
body sensor assembly.
5 Defective throttle position sen-
sor.
6 Malfunction in ECU.
7 Delete the fault code and check
that the engine trouble warning
light goes off.
P0122, P0123
[P0122] Throttle position sensor: open or short to ground circuit is
detected.
[P0123] Throttle position sensor: short to power circuit is detected.
Check for looseness or pinch-
ing.
Improperly installed sensor →
Reinstall.
Check throttle position sensor
signal.
Execute the diagnostic mode.
(Code No. 01)
When the throttle valves are ful-
ly closed:
A value of 13-21 is indicated.
When throttle valves are fully
open:
A value of 92-107 is indicated.
An indicated value is out of the
specified range → Replace the
throttle body.
Replace the ECU.
Confirm that the fault code has
a condition of "Recover" using
the YDT, and then delete the
fault code.
8-64
ELEC
Turn the main switch to "ON",
and then check the fault code
using the malfunction mode of
the YDT.
Condition is "Recover" → Go to
item 7 and finish the service.
Condition is "Malfunction" → Go
to item 5.
Turn the main switch to "ON",
and then check the fault code
using the malfunction mode of
the YDT.
Condition is "Recover" → Go to
item 7 and finish the service.
Condition is "Malfunction" → Go
to item 6.
Service is finished.
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