Yamaha MBK X-MAX 300 2017 Service Manual page 359

Fault code No.
Item
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).
3 Wire harness continuity.
4 Installed condition of crankshaft
position sensor.
Check for looseness or pinch-
ing.
5 Defective crankshaft position
sensor.
6 Malfunction in ECU.
7 Delete the fault code and check
that the engine trouble warning
light goes off.
Fault code No. P0351
Fault code No.
Item
Fail-safe system
Diagnostic code No.
P0335
Crankshaft position sensor: no normal signals are received from the
crankshaft position sensor.
Improperly connected → Con-
nect the coupler securely or re-
place the wire harness.
Open or short circuit → Replace
the wire harness.
Between crankshaft position
sensor coupler and ECU cou-
pler.
white/red–white/red
black/blue–black/blue
Improperly installed sensor →
Reinstall or replace the sensor.
Refer to "GENERATOR AND
STARTER CLUTCH" on page
5-46.
Check the crankshaft position
sensor.
Refer to "CHECKING THE
CRANKSHAFT POSITION
SENSOR" on page 8-134.
Replace if defective.
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.
P0351
Ignition coil: no normal signals are received from the ignition circuit.
Unable to start engine
Unable to drive vehicle
30
8-54
FUEL INJECTION SYSTEM
Crank the engine, and then
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 3.
Crank the engine, and then
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 4.
Crank the engine, and then
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 5.
Crank the engine, and then
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.