Yamaha YZF-R1 Series Service Manual page 538

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC Item
P0117 [P0117] Coolant tem-
P0118 perature sensor:
ground short circuit
detected.
[P0118] Coolant tem-
perature sensor: open
or power short circuit
detected.
P0122 [P0122] Throttle posi-
P0123 tion sensor: ground
P0222 short circuit detected.
P0223 [P0123] Throttle posi-
P2135 tion sensor: open or
power short circuit de-
tected.
[P0222] Throttle posi-
tion sensor: open or
ground short circuit
detected.
[P0223] Throttle posi-
tion sensor: power
short circuit detected.
[P2135] Throttle posi-
tion sensor: output
voltage deviation er-
ror.
Probable cause of
malfunction
Engine is difficult to
[P0117] Low voltage
of the coolant tem- start.
perature sensor circuit Increased exhaust
(0.1 V or less) emissions.
Engine idling speed is
[P0118] High voltage
of the coolant tem- unstable.
perature sensor circuit
(4.9 V or more)
• Defective coupler
between coolant
temperature sensor
and ECU.
• Open or short cir-
cuit in wire harness
between coolant
temperature sensor
and ECU.
• Improperly installed
coolant temperature
sensor.
• Defective coolant
temperature sensor.
• Malfunction in ECU.
Engine idling speed is
[P0122, P0222] Low
voltage of the throttle high.
position sensor circuit Engine idling speed is
(0.25 V or less) unstable.
Engine response is
[P0123, P0223] High
voltage of the throttle poor.
position sensor circuit Loss of engine power.
(4.75 V or more) Deceleration is poor.
[P2135] Difference in Increased exhaust
emissions.
output voltage 1 and
output voltage 2 of the Vehicle cannot be
throttle position sen- driven.
sor
• Defective coupler
between throttle po-
sition sensor and
ECU.
• Open or short cir-
cuit in wire harness
between throttle po-
sition sensor and
ECU.
• Improperly installed
throttle position sen-
sor.
• Defective throttle po-
sition sensor.
• Malfunction in ECU.
9-41
Fail-safe system op-
Vehicle symptom
The radiator fan motor
relay is on only when
the vehicle is traveling
at low speeds.
O
2
carried out.
ISC feedback is not
carried out.
ISC learning is not
carried out.
The coolant tempera-
ture is fixed to 60 [°C].
QSS is not carried
out.
Engine brake man-
agement: control val-
ue is fixed.
Change in the throttle
opening is 0 (transient
control is not carried
out).
D–j is fixed.
Throttle opening is
fixed to 125 [°].
O
2
carried out.
Fuel is not cut off due
to the throttle open-
ing.
Output is restricted.
Air induction system
solenoid is turned on
all the time (air induc-
tion system air cut
off).
ISC feedback is not
carried out.
ISC learning is not
carried out.
O
2
ing is not carried out.
QSS is not carried
out.
Engine brake man-
agement: control
mode is fixed.
eration
feedback is not
feedback is not
sensor heater driv-