Yamaha Tracer MT09TRAH 2017 Service Manual page 467

Fault code No.
Item
3-10 [For P2122/P2123] Short circuit
Between accelerator position sensor output terminal (white) "a" of ECU coupler and any other ECU
coupler terminal "b".
If there is continuity, replace the wire harness.
3-11 [For P2127/P2128] Short circuit
Between accelerator position sensor output terminal (black) "a" of ECU coupler and any other ECU
coupler terminal "b".
If there is continuity, replace the wire harness.
4 Installed condition of accelera-
tor position sensor.
5 Accelerator position sensor
resistance.
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.
b
b
Check for looseness or pinch-
ing.
Improperly installed sensor 
Reinstall or adjust the sensor.
Refer to "ADJUSTING THE
ACCELERATOR POSITION
SENSOR" on page 7-13.
Measure the accelerator posi-
tion sensor resistance.
black/blue–blue
Refer to "CHECKING THE
ACCELERATOR POSITION
SENSOR" on page 8-170.
8-96
FUEL INJECTION SYSTEM
a
a
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha
diagnostic tool.
Condition is "Recovered"  Go
to item 8 and finish the service.
Condition is "Detected"  Go to
item 5.
Turn the main switch to "ON",
and then check the condition of
the fault code using the mal-
function mode of the Yamaha
diagnostic tool.
Condition is "Recovered"  Go
to item 8 and finish the service.
Condition is "Detected"  Go to
item 6.