Yamaha MT-09 2021 Service Manual page 487

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC Item
P0112 [P0112] Intake air
P0113 temperature sensor:
ground short circuit
detected.
[P0113] Intake air
temperature sensor:
open or power short
circuit detected.
P0115 Coolant tempera-
ture sensor: signal
stuck
Probable cause of
malfunction
[P0112] Low voltage
of the intake air tem-
perature sensor cir-
cuit (0.1 V or less)
[P0113] High volt-
age of the intake air
temperature sensor
circuit (4.8 V or
more)
• Defective coupler
between intake air
temperature sen-
sor and ECU.
• Open or short cir-
cuit in wire har-
ness between
intake air tempera-
ture sensor and
ECU.
• Improperly in-
stalled intake air
temperature sen-
sor.
• Defective intake
air temperature
sensor.
• Malfunction in
ECU.
• Defective coolant
temperature sen-
sor.
• Malfunction in
ECU.
9-57
Vehicle symptom
Engine is difficult to
start.
Increased exhaust
emissions.
Engine idling speed
is unstable.
Engine is difficult to
start.
Increased exhaust
emissions.
Engine idling speed
is unstable.
Fail-safe system
operation
The intake air tem-
perature is fixed to
20 [°C].
O sensor heater
2
driving is not carried
out.
O feedback is not
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)
The radiator fan mo-
tor relay is on only
when the vehicle is
traveling at low
speeds.
O feedback is not
2
carried out.
ISC feedback is not
carried out.
ISC learning is not
carried out.
The coolant tem-
perature is fixed to
60 [°C].
QSS is not carried
out.
Cruise control sys-
tem cannot be oper-
ated. (for
MTN890D)