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Fault code No.
Item
2
Connection of wire harness
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.
4
Defective O
sensor heater.
2
5
Malfunction in ECU.
P0030
O
sensor heater: defective heater controller detected.
2
Improperly connected Con-
nect the coupler securely or
replace the wire harness.
Open or short circuit Properly
connect or replace the wire har-
ness.
Between O
sensor coupler and
2
ECU coupler.
black–black
Between joint coupler and fuel
injection system relay.
red/blue–red/blue
Replace the O
2
Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-230.
8-65
FUEL INJECTION SYSTEM
Push the ON/start switch, and
then check the condition of the
fault code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered" Go
to item 6 and finish the service.
Condition is "Detected" Start
the engine, and then check the
condition of the fault code.
Condition is "Recovered" Go
to item 6 and finish the service.
Condition is "Detected" Go to
item 3.
TIP
For this check, also set the
engine stop switch to "ON".
Push the ON/start switch, and
then check the condition of the
fault code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered" Go
to item 6 and finish the service.
Condition is "Detected" Start
the engine, and then check the
condition of the fault code.
Condition is "Recovered" Go
to item 6 and finish the service.
Condition is "Detected" Go to
item 4.
TIP
For this check, also set the
engine stop switch to "ON".
sensor.
Push the ON/start switch, and
then check the condition of the
fault code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered" Go
to item 6 and finish the service.
Condition is "Detected" Start
the engine, and then check the
condition of the fault code.
Condition is "Recovered" Go
to item 6 and finish the service.
Condition is "Detected" Go to
item 5.
TIP
For this check, also set the
engine stop switch to "ON".
Service is finished.
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Table of Contents
Troubleshooting
