Yamaha R15 2022, Service Manual

Page: 387 / 497

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FUEL INJECTION SYSTEM TROUBLESHOOTING
– + ELEC
4 Installed condition of throttle
body sensor assembly. Check for looseness or pinch-
ing.
Improperly installed sensor
→
Reinstall.
Turn the main switch to “ON”,
and then check the fault code
using the malfunction mode of
the YDT.
Condition is “Recover”
→
Go to
item 7 and finish the service.
Condition is “Malfunction”
→
Go
to item 5.
5 Defective intake air pressure
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) 3.98V
1000 m (3300 ft) above sea lev-
el: Approx. 90 kPa (675.1
mmHg, 26.6 inHg) 3.55V
2000 m (6700 ft) above sea lev-
el: Approx. 80 kPa (600.0
mmHg, 23.6 inHg) 3.15V
3000 m (9800 ft) above sea lev-
el: Approx. 70 kPa (525.0
mmHg, 20.7 inHg) 2.76V
When engine is cranking: Make
sure that the indication value
changes.
The value does not change
when engine is cranking.
→
Re-
place the throttle body assem-
bly.
Crank the engine, and then
check the fault code using the
malfunction mode of the
YDT.
Condition is “Recover”
→
Go to
item 7 and finish the service.
Condition is “Malfunction”
→
Go
to item 6.
6 Malfunction in ECU. Replace the ECU. Service is finished.
7 Delete the fault code and check
that the engine trouble warning
light goes off. Confirm that the fault code has
a condition of “Recover” using
the YDT, and then delete the
fault code.
Fault code No. P0107, P0108
Item
[P0107] Intake air pressure sensor: open or short to ground circuit is
detected.
[P0108] Intake air pressure sensor: short to power circuit is detected.
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