Yamaha R15 2022 Service Manual page 394

FUEL INJECTION SYSTEM TROUBLESHOOTING
Fault code No.
Item
7 Delete the fault code and check
that the engine trouble warning
light goes off.
Fault code No. P0122, P0123
Do not remove the throttle body sensor assembly from the throttle body.
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1 Connection of throttle body sen-
sor assembly coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
2 Connection of ECU coupler.
Check the locking condition of
the coupler.
Disconnect the coupler and
check the pins (bent or broken
terminals and locking condition
of the pins).
3 Wire harness continuity.
P0117, P0118
[P0117] Coolant temperature sensor: short to ground circuit is de-
tected.
[P0118] Coolant temperature sensor: open or short to power circuit
is detected.
Confirm that the fault code has
a condition of "Recover" using
the YDT, and then delete the
fault code.
P0122, P0123
[P0122] Throttle position sensor: open or short to ground circuit is
detected.
[P0123] Throttle position sensor: short to power circuit is detected.
Able to start engine
Able to drive vehicle
01
Throttle position sensor signal
• 13–21 (fully closed position)
• 92–107 (fully open position)
• Check with throttle valves fully closed.
• Check with throttle valves fully open.
Maintenance job
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
8-61
ELEC
Confirmation of service com-
pletion
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 2.
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 3.
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 4.
– +