Yamaha R15 2022 Service Manual page 399

FUEL INJECTION SYSTEM TROUBLESHOOTING
Fault code No.
Item
3 Wire harness continuity.
4 Defective O sensor heater.
2
5 Malfunction in ECU.
6 Delete the fault code and check
that the engine trouble warning
light goes off.
P0030
O sensor: defective heater or heater driver ON/OFF command and
2
error signal is mismatching.
Open or short circuit → Properly
connect or replace the wire har-
ness.
Between ECU coupler and O
sensor coupler.
pink/black–pink/black
Between O sensor coupler and
2
joint coupler #1.
brown–brown
Between joint coupler #1 and
main switch coupler.
brown–brown
Between main switch and main
fuse.
red–red
Between main fuse and battery
terminal.
red-red
Replace the O
2
Replace the ECU.
Confirm that the fault code has
a condition of "Recover" using
the YDT, and then delete the
fault code.
8-66
Turn the main switch to "ON",
and then check the fault code
using the malfunction mode of
the YDT.
2
Condition is "Recover" → Go to
item 6 and finish the service.
Condition is "Malfunction" →
Start the engine, and then
check the fault code.
Condition is "Recover" → Go to
item 6 and finish the service.
Condition is "Malfunction" → Go
to item 4.
TIP
For this check, also set the
engine stop/start switch to "ON".
sensor. 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 6 and finish the service.
Condition is "Malfunction" →
Start the engine, and then
check the fault code.
Condition is "Recover" → Go to
item 6 and finish the service.
Condition is "Malfunction" → Go
to item 5.
TIP
For this check, also set the
engine stop/start switch to "ON".
Service is finished.
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