Yamaha MBK X-MAX 300 2017, Service Manual

Page: 361 / 462

FUEL INJECTION SYSTEM
8-56
Fault code No. P0480
5 Defective ignition coil. 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. 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.
6 Malfunction in ECU. Execute the diagnostic mode.
(Code No. 30)
No spark
→
Replace the ECU.
Refer to “REPLACING THE
ECU (Engine Control Unit)” on
page 8-128.
Service is finished.
7 Delete the fault code and check
that the engine trouble warning
light goes off. Confirm that the fault code has
a condition of “Recover” using
the Yamaha diagnostic tool, and
then delete the fault code.
Fault code No. P0351
Item Ignition coil: no normal signals are received from the ignition circuit.
Fault code No. P0480
Item
No normal signals are received from the radiator fan motor relay.
Radiator fan motor relay: open circuit detected.
Fail-safe system
Able to start engine
Able to drive vehicle
Diagnostic code No. —
Tool display —
Procedure —
Item
Probable cause of malfunc-
tion and check
Maintenance job
Confirmation of service com-
pletion
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). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
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.
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). Improperly connected
→
Con-
nect the coupler securely or re-
place the wire harness.
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.