Yamaha XSR 900 2022 Service Manual page 476

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
DTC Item
P2122 [P2122] Accelerator
P2123 position sensor:
P2127 open or short to
P2128 ground circuit is de-
P2138 tected. Normal sig-
nal is not received
from the accelerator
position sensor.
[P2123] Accelerator
position sensor:
short to power cir-
cuit is detected.
Normal signal is not
received from the
accelerator position
sensor.
[P2127] Accelerator
position sensor:
open or short to
ground circuit is de-
tected. Normal sig-
nal is not received
from the accelerator
position sensor.
[P2128] Accelerator
position sensor:
short to power cir-
cuit is detected.
Normal signal is not
received from the
accelerator position
sensor.
[P2138] Deviation
error. Normal signal
is not received from
the accelerator posi-
tion sensor.
P2158 Front wheel sensor:
normal signal is not
received from the
front wheel sensor.
Probable cause of
malfunction
[P2122, P2127] Low
voltage of the accel-
erator position sen-
sor circuit (0.25 V or
less)
[P2123, P2128]
High voltage of the
accelerator position
sensor circuit (4.75
V or more)
[P2138] Difference
in output voltage 1
and output voltage 2
of the accelerator
position sensor
• Defective coupler
between accelera-
tor position sensor
and ECU.
• Open or short cir-
cuit in wire har-
ness between
accelerator posi-
tion sensor and
ECU.
• Improperly in-
stalled accelerator
position sensor.
• Defective acceler-
ator position sen-
sor.
• Malfunction in
ECU.
• Open or short cir-
cuit in wire har-
ness between
front wheel sensor
and ECU.
• Defective front
wheel sensor.
• Malfunction in
ECU.
9-70
Vehicle symptom
Engine response is
poor.
Loss of engine pow-
er.
Engine idling speed
is unstable.
Traction control
does not work.
Stability control indi-
cator light on the
meter comes on.
Traction control sys-
tem switch is dis-
abled. (Stability
control indicator
light on the meter
goes OFF.)
Fail-safe system
operation
No change in accel-
erator opening
(transient control is
not carried out).
Accelerator open-
ing is fixed to 0[°].
O feedback is not
2
carried out.
YCC-T evacuation
is activated.
Fuel cut is prohibit-
ed by accelerator
opening.
Output is restricted.
ISC feedback is not
carried out.
ISC learning is not
carried out.
Quick shift system is
not carried out.
Cruise control fixed
to OFF.
Traction control
does not work.
Cruise control fixed
to OFF.