Yamaha TMAX XP530E-A 2017 Service Manual page 654

SELF-DIAGNOSTIC FUNCTION AND DIAGNOSTIC CODE TABLE
Fault
Item
code No.
P2122 [P2122] Accelerator
P2123 position sensor (open
P2127 or ground short cir-
P2128 cuit detected)
P2138 [P2123] Accelerator
position sensor
(power short circuit
detected)
[P2127] Accelerator
position sensor
(ground short circuit
detected)
[P2128] Accelerator
position sensor (open
or power short circuit
detected)
[P2138] Accelerator
position sensor (out-
put voltage deviation
error)
P2158 Front wheel sensor
(no normal signals are
received from the
front wheel sensor)
P2195 O sensor (no signals
2
are received from the
O sensor.)
2
Probable cause of
malfunction
[P2122, P2127] Low
voltage of the acceler-
ator position sensor
circuit (0.25 V or less)
[P2123, P2128] High
voltage of the acceler-
ator 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 harness
between accelera-
tor position sensor
and ECU.
• Improperly installed
accelerator position
sensor.
• Defective accelera-
tor position sensor.
• Malfunction in ECU.
• Open or short cir-
cuit in wire harness
between front wheel
sensor and ECU.
• Defective front
wheel sensor.
• Malfunction in ECU.
• Signal voltage is
0.25–0.53 V.
• Improperly installed
O sensor.
2
• Defective coupler
between O sensor
2
and ECU.
• Open or short cir-
cuit in wire harness
between O sensor
2
and ECU.
• Defective O
sensor.
2
• Malfunction in ECU.
9-11
Vehicle symptom
Engine response is
poor.
Loss of engine power.
Engine idling speed is
unstable.
Engine response is
poor.
Loss of engine power.
Engine idling speed is
unstable.
Traction control does
not work.
Traction control sys-
tem indicator on the
meter comes on.
Traction control sys-
tem switch is dis-
abled. (Traction
control system indica-
tor on the meter goes
OFF)
Increased exhaust
emissions.
(ECU)
Fail-safe system
operation
No change in acceler-
ator opening. (Tran-
sient control is not
carried out.)
Accelerator opening is
fixed to 0[].
O feedback is not
2
carried out.
YCC-T evacuation is
activated.
Fuel cut is prohibited
by accelerator open-
ing.
Output is restricted.
ISC feedback is not
carried out.
ISC learning is not
carried out.
Cruise control system
cannot be operated.
Traction control does
not work.
Cruise control system
cannot be operated.
O feedback is not
2
carried out.
O feedback learning
2
is not carried out.
Cruise control system
cannot be operated.