Yamaha R15 2022 Service Manual page 405

FUEL INJECTION SYSTEM TROUBLESHOOTING
Fault code No.
Item
5 Defective ignition coil.
6 Malfunction in ECU.
7 Delete the fault code and check
that the engine trouble warning
light goes off.
Fault code No. P0480
Fault code No.
Item
Fail-safe system
Diagnostic code No.
Tool display
Procedure
Probable cause of malfunc-
Item
tion and check
1 Connection of radiator fan motor
relay 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).
P0351
Ignition coil: open or short circuit is detected in the lead of the igni-
tion coil.
Measure the primary coil resis-
tance of the ignition coil (2.2–
2.6 Ω).
Replace the ignition coil, if out of
specification.
Execute the diagnostic mode.
(Code No. 30)
No spark → Replace the ECU.
Confirm that the fault code has
a condition of "Recover" using
the YDT, and then delete the
fault code.
P0480
Normal signal is not received from the radiator fan motor relay.
Able to start engine
Able to drive vehicle
51
Actuates the radiator fan motor relay five times at five-second intervals.
The check indicator on the YDT screen come on each time the radiator
fan motor relay is actuated.
Check that the radiator fan motor relay is actuated five times by listening
for the operating sound.
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.
8-72
ELEC
Start the engine and let it idle for
approximately 5 seconds.
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.
Confirmation of service com-
pletion
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the YDT.
Condition is "Recover" → Go to
item 6 and finish the service.
Condition is "Malfunction" → Go
to item 2.
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the YDT.
Condition is "Recover" → Go to
item 6 and finish the service.
Condition is "Malfunction" → Go
to item 3.
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