Yamaha XVS950CU 2014, Service Manual

Page: 441 / 580

FUEL INJECTION SYSTEM
7-50
4 Wire harness continuity. Open or short circuit
→
Re-
place the wire harness.
Between intake air pressure
sensor coupler and ECU
coupler.
pink/white–pink/white
Between intake air pressure
sensor coupler and joint cou-
pler.
blue–blue
black/blue–black/blue
Between joint coupler and
ECU coupler.
blue–blue
black/blue–black/blue
Turn the main switch to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 5.
5 Installed condition of intake
air pressure sensor.
Check for looseness or
pinching. Improperly installed sensor
→
Reinstall or replace the
sensor.
Turn the main switch to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 6.
6 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)
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.
Replace if defective.
Refer to “CHECKING THE
INTAKE AIR PRESSURE
SENSOR” on page 7-168.
Turn the main switch to “ON”.
Fault code number is not dis-
played
→
Service is finished.
Fault code number is dis-
played
→
Go to item 7.
7 Malfunction in ECU. Replace the ECU.
Fault code No. 13
Item Intake air pressure sensor: open or short circuit detected.