Yamaha YZF-R1 2020 Service Manual page 542

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC Item
P0069 Intake air pressure
sensor or atmospher-
ic pressure sensor:
when the main switch
is turned to "ON", the
intake air pressure
sensor voltage and at-
mospheric pressure
sensor voltage differ
greatly.
P00D1 O sensor 1: heater
2
performance deterio-
ration
P00D3 O sensor 2: heater
2
performance deterio-
ration
Probable cause of
malfunction
• Malfunction in ECU.
• Intake air pressure
sensor hose is dis-
connected, clogged,
kinked, or pinched.
• Defective intake air
pressure sensor or
atmospheric pres-
sure sensor.
• Improperly installed
O sensor 1.
2
• Defective coupler
between O sensor
2
1 and ECU.
• Open or short cir-
cuit in wire harness
between O sensor
2
1 and ECU.
• Incorrect fuel pres-
sure.
• Defective O sensor
2
1.
• Malfunction in ECU.
• Improperly installed
O sensor 2.
2
• Defective coupler
between O sensor
2
2 and ECU.
• Open or short cir-
cuit in wire harness
between O sensor
2
2 and ECU.
• Incorrect fuel pres-
sure.
• Defective O sensor
2
2.
• Malfunction in ECU.
9-47
Vehicle symptom
Engine is difficult to
start.
Engine idling speed is
unstable.
Increased exhaust
emissions.
Loss of engine power.
Increased exhaust
emissions.
Increased exhaust
emissions.
Fail-safe system op-
eration
Intake air pressure is
fixed to 101.3 [kPa].
Intake air pressure
difference is fixed to 0
[kPa].
Atmospheric pres-
sure is fixed to 101.3
[kPa].
α–N is fixed.
Fuel is not cut off due
to the intake air pres-
sure difference.
Atmospheric pres-
sure sensor output
correction value is
fixed to 0.
O feedback is not
2
carried out.
ISC feedback is not
carried out.
ISC learning is not
carried out.
QSS is not carried
out.
O feedback is not
2
carried out.
O learning is not car-
2
ried out.
Air induction system
solenoid is turned on
all the time (air induc-
tion system air cut
off).
QSS is not carried
out.
O feedback is not
2
carried out.
O learning is not car-
2
ried out.
Air induction system
solenoid is turned on
all the time (air induc-
tion system air cut
off).
QSS is not carried
out.