APRILIA SHIVER 900, Service Station Manual

Page: 172 / 444

•
The throttle valve power supply voltage is too low to correctly perform the self-learning test
(at each key ON). The instrument panel indicates this error by lighting up in a fixed manner
the MI warning light.
Troubleshooting:
•
Remove the presence of errors that prevent throttle self-learning.
P0639 Rear throttle valve position error - EPOS error
•
Misalignment between control and activation
Error cause:
•
The throttle valve mechanical control could be damaged.
Troubleshooting:
•
Replace the throttle body.
P1401 Rear throttle valve mechanical springs self-learning (opening)
Functional diagnosis:
•
Test failed
Error cause:
•
The recognition of this error is enabled during the throttle self-learning procedure.
•
Throttle valve return time, in the position maintained by the springs, outside of the specified
limits: the causes can be a deterioration of spring performance or excessive throttle valve
friction (at each key ON)
This error is indicated by lighting up in a fixed manner the MI warning light.
Troubleshooting:
•
Using the diagnostic tool, erase the error, then perform the throttle self-learning procedure.
If the error is displayed again, it may mean a mechanical problem at the throttle boy.
•
Check the cleanliness of the throttle body and the intake duct. Check if there are any me-
chanical ruptures. Replace the throttle body, if necessary.
P1407 Front throttle valve mechanical springs self-learning (opening)
Functional diagnosis:
•
Test failed
Error cause:
•
The recognition of this error is enabled during the throttle self-learning procedure.
•
Throttle valve return time, in the position maintained by the springs, outside of the specified
limits: the causes can be a deterioration of spring performance or excessive throttle valve
friction (at each key ON)
This error is indicated by lighting up in a fixed manner the MI warning light.
Troubleshooting:
Electrical system
SHIVER 900
ELE SYS - 172