Yamaha TMAX XP530E-A 2017 Service Manual page 497

Fault code No.
Item
3 Wire harness continuity.
3-1
1. Accelerator position sensor
2. ECU
3. Sensor input lead
4. Sensor output lead 1
5. Sensor output lead 2
6. Sensor ground lead
3-2 Disconnect the ECU coupler from the ECU.
Disconnect the accelerator position sensor coupler from the accelerator position sensor.
P2122, P2123, P2127, P2128, P2138
[P2122] Accelerator position sensor: open or ground short circuit
detected.
[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: output voltage deviation error.
Open or short circuit  Replace
the wire harness.
1
3
L
4
W
5
R
6
B/L
8-106
FUEL INJECTION SYSTEM
Push the ON/start switch, and
then check the condition of the
fault code using the malfunction
mode of the Yamaha diagnostic
tool.
Condition is "Recovered"  Go
to item 7 and finish the service.
Condition is "Detected"  Go to
item 4.
2
5V
L
W
5V
R
B/L