Yamaha MT-09 2021 - Page 497

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SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
P1004 Intake air pressure
sensor 1 and intake
air pressure sensor
2: output voltage de-
viation error.
• Intake pressure
sensor 1 hose or
intake pressure
sensor 2 hose is
detached,
clogged, kinked or
bent.
• Defective intake
air pressure sen-
sor 1 or intake air
pressure sensor 2.
• Malfunction in
ECU.
Engine is difficult to
start.
Engine idling speed
is unstable.
Increased exhaust
emissions.
Loss of engine pow-
er.
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
pressure difference.
O
2
feedback is not
carried out.
ISC feedback is not
carried out.
ISC learning is not
carried out.
Cruise control sys-
tem cannot be oper-
ated. (for
MTN890D)
P1600 Lean angle sensor:
open or short circuit
detected.
• Open or short cir-
cuit in wire har-
ness.
• Malfunction in
IMU.
• Malfunction in
ECU.
Engine cannot be
started.
Engine cannot be
started.
Cruise control sys-
tem cannot be oper-
ated. (for
MTN890D)
P1601 Sidestand switch:
open or short circuit
of the blue/yellow
lead of the ECU is
detected.
• Defective coupler
between relay unit
and ECU.
• Open or short cir-
cuit in wire har-
ness between
relay unit and
ECU.
• Defective coupler
between sidestand
switch and relay
unit.
• Open or short cir-
cuit in wire har-
ness between
sidestand switch
and relay unit.
• Defective side-
stand switch.
• Malfunction in
ECU.
Engine cannot be
started.
Engine is forcefully
stopped (the injector
output is stopped).
Cruise control sys-
tem cannot be oper-
ated. (for
MTN890D)
DTC Item
Probable cause of
malfunction
Vehicle symptom
Fail-safe system
operation