Yamaha MBK X-MAX 300 2017 Service Manual page 449

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
Fault code
Item
No.
P0335 Crankshaft position
sensor
(no normal signals are
received from the
crankshaft position
sensor)
P0351 Ignition system
(no normal signals are
received from the igni-
tion circuit)
P0480 Radiator fan motor re-
lay
(open circuit detect-
ed)
(no normal signals are
received from the ra-
diator fan motor relay)
P0500 Front wheel sensor
(no normal signals are
received from the
front wheel sensor)
Probable cause of
malfunction
• Defective coupler
between crankshaft
position sensor and
ECU.
• Open or short cir-
cuit in wire harness
between crankshaft
position sensor and
ECU.
• Improperly installed
crankshaft position
sensor.
• Defective stator coil.
• Defective crank-
shaft position sen-
sor.
• Malfunction in ECU.
• Defective coupler
between ignition coil
and ECU.
• Open or short cir-
cuit in wire harness
between ignition coil
and ECU.
• Improperly installed
ignition coil.
• Defective ignition
coil.
• Malfunction in ECU.
• Open circuit in wire
harness between ra-
diator fan motor re-
lay and ECU.
• Defective coupler
between radiator fan
motor relay and
ECU.
• Defective driver.
• Open circuit in radi-
ator fan motor relay.
• Malfunction in ECU.
• Open or short cir-
cuit in wire harness
between front wheel
sensor and ABS
unit.
• Open or short cir-
cuit in wire harness
between ABS unit
and ECU.
• Defective front
wheel sensor.
• Malfunction in ABS
unit.
• Malfunction in ECU.
9-4
Vehicle symptom
Engine cannot be
started.
Engine stops.
Loss of engine power.
Engine is difficult to
start.
Engine cannot be
started.
Engine is difficult to
start.
Loss of engine power.
Engine overheats.
Increased exhaust
emissions.
Vehicle speed is not
displayed on the me-
ter.
Engine stalls when
the vehicle is deceler-
ating to a stop.
Engine idling speed is
high.
Engine idling speed is
unstable.
Increased exhaust
emissions.
Fail-safe system op-
eration
Does not operate.
When engine is run-
ning: Engine is force-
fully stopped.
When engine is
stopped: Engine can-
not be started.
Injection is not car-
ried out.
—
O feedback is not
2
carried out.
ISC feedback is not
carried out.
ISC learning is not
carried out.