Yamaha MTN850-A 2017 Service Manual page 541

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
Fault
Item
code No.
P0351 [P0351] Cylinder-#1
P0352 ignition coil (open or
P0353 short circuit detected
in the primary lead of
the cylinder-#1 igni-
tion coil.)
[P0352] Cylinder-#2
ignition coil (open or
short circuit detected
in the primary lead of
the cylinder-#2 igni-
tion coil.)
[P0353] Cylinder-#3
ignition coil (open or
short circuit detected
in the primary lead of
the cylinder-#3 igni-
tion coil.)
P0500 [P0500, P1500] Rear
P1500 wheel sensor (no nor-
mal signals are
received from the rear
wheel sensor)
[P1500] Neutral
switch (open or short
circuit is detected)
[P1500] Clutch switch
(open or short circuit
is detected)
P0560 Charging voltage is
abnormal.
Probable cause of
malfunction
• 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 or short cir-
cuit in wire harness
between rear wheel
sensor and ABS
unit.
• Open or short cir-
cuit in wire harness
between ABS unit
and ECU.
• Open or short cir-
cuit in wire harness
between neutral
switch and ECU.
• Open or short cir-
cuit in wire harness
between clutch
switch and ECU.
• Defective rear wheel
sensor.
• Defective neutral
switch.
• Defective clutch
switch.
• Improper adjust-
ment of clutch lever.
• Malfunction in ECU.
• Battery overcharg-
ing (defective recti-
fier/regulator).
• Battery overcharg-
ing (broken or dis-
connected lead in
rectifier/regulator
wire harness).
• Battery over-dis-
charging (broken or
disconnected lead in
charging system).
• Battery over-dis-
charging (defective
rectifier/regulator).
9-8
Vehicle symptom
Engine stops.
Loss of engine power.
Engine is difficult to
start.
Engine cannot be
started.
Engine idling speed is
unstable.
Increased exhaust
emissions.
Vehicle speed is not
displayed on the
meter.
Engine stalls when
the vehicle is deceler-
ating to a stop.
Engine idling speed is
high.
Indication of the neu-
tral indicator light is
incorrect.
Engine cannot be
restarted when the
transmission is in
gear even with the
clutch lever squeezed.
Engine idling speed is
unstable.
Increased exhaust
emissions.
Traction control does
not work.
Engine is difficult to
start.
Increased exhaust
emissions.
Battery performance
has deteriorated or
battery is defective.
Fail-safe system
operation
Injection to the appli-
cable cylinder group is
cut off.
Air induction system
solenoid is turned on
all the time (air induc-
tion system air cut off).
O feedback is not
2
carried out.
ISC feedback is not
carried out.
ISC learning is not
carried out.
Vehicle speed dis-
played on the meter =
0 [km/h]
O feedback is not
2
carried out.
Fuel cut-off control
when the rear wheel
sensor or neutral
switch malfunctions is
carried out.
ISC feedback is not
carried out.
ISC learning is not
carried out.
Traction control does
not work.
O feedback is not
2
carried out.