APRILIA SHIVER 900 Service Station Manual page 169

SHIVER 900
tenths of an Ohm. Otherwise, restore the wiring harness; if ok, replace the complete throttle
body.
P2126 Rear throttle body potentiometer 2
Functional diagnosis:
•
Signal not plausible.
Error cause:
•
Signal outside the specified value determined based on the values of the intake pressure.
Troubleshooting:
•
Check the parameter of the Potentiometer 2 rear throttle valve (voltage) to know which signal
the control unit receives and to compare it to the Potentiometer 2 front throttle valve (volt-
age). Check the throttle body connector and the control unit connector. Check that cable
resistance between the throttle body connector (PIN 4) and the throttle control unit (PIN 21)
is a few tenths of an Ohm. Otherwise, restore the wiring harness; if ok, replace the complete
throttle body.
P1400 Front throttle valve Limp Home self-learning
Functional diagnosis:
•
Test failed.
Error cause:
•
Position of the throttle valve, maintained by the springs, outside the specified range (at each
key ON).
The instrument panel indicates this error by lighting up in a fixed manner the MI warning light.
Troubleshooting:
•
Check the cleanliness of the throttle body and the intake duct. If ok, replace the throttle body.
P1405 Front throttle valve mechanical (re-closing) springs self-learning
Functional diagnosis:
•
Test failed.
Error cause:
•
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).
Troubleshooting:
•
Check the cleanliness of the throttle body and the intake duct. If ok, replace the throttle body.
P1402 Front throttle valve minimum mechanical position self-learning
Functional diagnosis:
Electrical system
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