Yamaha MBK X-MAX 300 2017 Service Manual page 361

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: no normal signals are received from the ignition circuit.
Measure the primary coil resis-
tance of the ignition coil.
Refer to "CHECKING THE IG-
NITION COIL" on page 8-132.
Replace if out of specification.
Execute the diagnostic mode.
(Code No. 30)
No spark → Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-128.
Confirm that the fault code has
a condition of "Recover" using
the Yamaha diagnostic tool, and
then delete the fault code.
P0480
No normal signals are received from the radiator fan motor relay.
Radiator fan motor relay: open circuit detected.
Able to start engine
Able to drive vehicle
—
—
—
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.
8-56
FUEL INJECTION SYSTEM
Start the engine and let it idle for
approximately 5 seconds.
Check the condition of the fault
code using the malfunction
mode of the Yamaha diagnostic
tool.
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-
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha di-
agnostic tool.
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 Yamaha di-
agnostic tool.
Condition is "Recover" → Go to
item 6 and finish the service.
Condition is "Malfunction" → Go
to item 3.
pletion