Yamaha MT-09 2021 Service Manual page 489

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC Item
P0122 [P0122] Throttle po-
P0123 sition sensor:
P0222 ground short circuit
P0223 detected.
P2135 [P0123] Throttle po-
sition sensor: open
or power short cir-
cuit detected.
[P0222] Throttle po-
sition sensor: open
or ground short cir-
cuit detected.
[P0223] Throttle po-
sition sensor: power
short circuit detect-
ed.
[P2135] Throttle po-
sition sensor: output
voltage deviation er-
ror.
P0132 O sensor: deterio-
2
ration detected
Probable cause of
malfunction
[P0122, P0222] Low
voltage of the throt-
tle position sensor
circuit (0.25 V or
less)
[P0123, P0223]
High voltage of the
throttle position sen-
sor circuit (4.75 V or
more)
[P2135] Difference
in output voltage 1
and output voltage 2
of the throttle posi-
tion sensor
• Defective coupler
between throttle
position sensor
and ECU.
• Open or short cir-
cuit in wire har-
ness between
throttle position
sensor and ECU.
• Improperly in-
stalled throttle po-
sition sensor.
• Defective throttle
position sensor.
• Malfunction in
ECU.
High voltage of the
O sensor circuit
2
(4.8 V or more)
• Improperly in-
stalled O sensor.
2
• Defective coupler
between O sen-
2
sor and ECU.
• Open or short cir-
cuit in wire har-
ness between O
2
sensor and ECU.
• Incorrect fuel pres-
sure.
• Defective O sen-
2
sor.
• Malfunction in
ECU.
9-59
Vehicle symptom
Engine idling speed
is high.
Engine idling speed
is unstable.
Engine response is
poor.
Loss of engine pow-
er.
Deceleration is
poor.
Increased exhaust
emissions.
Vehicle cannot be
driven.
Increased exhaust
emissions.
Fail-safe system
operation
Change in the throt-
tle opening is 0
(transient control is
not carried out).
D–j is fixed.
Throttle opening is
fixed to 125 [°].
O feedback is not
2
carried out.
Fuel is not cut off
due to the throttle
opening.
Output is restricted.
ISC feedback is not
carried out.
ISC learning is not
carried out.
O sensor heater
2
driving is not carried
out.
QSS is not carried
out.
Cruise control sys-
tem cannot be oper-
ated. (for
MTN890D)
O feedback is not
2
carried out.
O feedback learn-
2
ing is not carried
out.
QSS is not carried
out.
Cruise control sys-
tem cannot be oper-
ated. (for
MTN890D)