Yamaha Tracer MT09TRAH 2017 Service Manual page 412

Fault code No.
Item
3-8 [For P0107/P0108] Short circuit
Between intake air pressure sensor 1 output terminal (pink) "a" of ECU coupler and any other ECU
coupler terminal "b".
If there is continuity, replace the wire harness.
4 Installed condition of intake air
pressure sensor 1.
5 Defective intake air pressure
sensor 1.
6 Malfunction in ECU.
P0107, P0108
[P0107] Intake air pressure sensor 1: ground short circuit detected.
[P0108] Intake air pressure sensor 1: open or power short circuit
detected.
b
Check for looseness or pinch-
ing.
Improperly installed sensor 
Reinstall or replace the sensor.
Execute the diagnostic mode.
(Code No. 03)
When engine is stopped:
Atmospheric pressure at the
current altitude and weather
conditions is indicated.
At sea level: Approx. 101 kPa
(757.6 mmHg, 29.8 inHg)
1000 m (3300 ft) above sea
level: Approx. 90 kPa (675.1
mmHg, 26.6 inHg)
2000 m (6700 ft) above sea
level: Approx. 80 kPa (600.0
mmHg, 23.6 inHg)
3000 m (9800 ft) above sea
level: Approx. 70 kPa (525.0
mmHg, 20.7 inHg)
When engine is cranking: Make
sure that the indication value
changes.
The value does not change
when engine is cranking. 
Check the intake air pressure
sensor 1.
Replace if defective.
Refer to "CHECKING THE
INTAKE AIR PRESSURE SEN-
SOR" on page 8-172.
Replace the ECU.
Refer to "REPLACING THE
ECU (Engine Control Unit)" on
page 8-157.
8-41
FUEL INJECTION SYSTEM
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 7 and finish the service.
Condition is "Detected"  Go to
item 5.
Crank the engine, 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 6.
Service is finished.