Yamaha MT-09 2021 Service Manual page 492

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC Item
P0351 [P0351] Cylinder-#1
P0352 ignition coil: open or
P0353 short circuit detect-
ed in the primary
lead of the cylinder-
#1 ignition coil.
[P0352] Cylinder-#2
ignition coil: open or
short circuit detect-
ed in the primary
lead of the cylinder-
#2 ignition coil.
[P0353] Cylinder-#3
ignition coil: open or
short circuit detect-
ed in the primary
lead of the cylinder-
#3 ignition coil.
P0480 Radiator fan motor
relay: open or short
circuit detected.
P0458 Purge cut valve so-
lenoid: open circuit
detected.
Probable cause of
malfunction
• Defective coupler
between ignition
coil and ECU.
• Open or short cir-
cuit in wire har-
ness between
ignition coil and
ECU.
• Improperly in-
stalled ignition coil.
• Defective ignition
coil.
• Malfunction in
ECU.
• Open or short cir-
cuit in wire har-
ness.
• Disconnected cou-
pler.
• Defective radiator
fan motor relay.
• Defective radiator
fan motor relay
controller (Mal-
function in ECU).
• Open or short cir-
cuit in wire har-
ness.
• Defective purge
cut valve solenoid.
• Malfunction in
ECU.
9-62
Vehicle symptom
Engine stops.
Loss of engine pow-
er.
Engine is difficult to
start.
Engine cannot be
started.
Engine idling speed
is unstable.
Increased exhaust
emissions.
Engine is difficult to
start.
Loss of engine pow-
er.
Engine overheats.
Increased exhaust
emissions.
Vapor gas cannot
be purged from can-
ister.
Fail-safe system
operation
feedback is not
O
2
carried out.
ISC feedback is not
carried out.
ISC learning is not
carried out.
QSS is not carried
out.
Cruise control sys-
tem cannot be oper-
ated. (for
MTN890D)
Radiator fan motor
relay is off all the
time.
O feedback is not
2
carried out.
ISC feedback is not
carried out.
ISC learning is not
carried out.
Cruise control sys-
tem cannot be oper-
ated. (for
MTN890D)
Closing side on
purge cut valve so-
lenoid is fixed.