APRILIA SHIVER 900 Service Station Manual page 134

Electrical system
•
Connect to the ABS control unit diagnosis.
LOGIC ERRORS
Speed sensor
5D91 the signal changes in intermittent manner
•
faulty sensor or signal interference.
Troubleshooting:
•
Check speed sensor retainer. If it is not OK, restore it. If it is OK, check if the tone wheel is
dirty, deformed or wrongly fixed. If any of this happens, replace the tone wheel. Otherwise,
replace the speed sensor.
5D92 the signal becomes weak periodically
•
Possible tone wheel fault due to deformations or dirt; the surface of the wheel bearings may
be deteriorated. In very rare cases, abnormal tone wheel vibrations.
Troubleshooting:
•
Check if the tone wheel is dirty, deformed or wrongly fixed. If the tone wheel is not OK,
replace it. If it is OK, check for possible faults in the wheel bearings and if it is not OK, replace
the bearings.
5D93 no signal or speed to low compared to the rear wheel
•
Faulty sensor or missing sensor/tone wheel. Or excessive distance between the sensor and
the tone wheel or tone wheel with wrong number of teeth.
Troubleshooting:
•
Check that the speed sensor and the tone wheel are installed. If they are not, install them.
If they are, check the speed sensor retainer. If it is not OK, restore it. If it is, check if the tone
wheel has the correct number of teeth or if it is dirty, deformed or wrongly fixed. If it is not
OK, replace the tone wheel and if it is OK, replace the speed sensor.
5D94 no acceleration after pressure reduction
•
Faulty sensor or missing sensor/tone wheel or excessive distance between the sensor and
the tone wheel.
Troubleshooting:
•
Check that the speed sensor and the tone wheel are installed. If they are not, install them.
If they are, check the speed sensor retainer. If it is not OK, restore it. If it is, check if the tone
wheel has the correct number of teeth or if it is dirty, deformed or wrongly fixed. If it is not
OK, replace the tone wheel and if it is OK, replace the speed sensor.
5D95 excessive measured speed
•
Faulty sensor or tone wheel, or tone wheel with wrong number of teeth or wrong tyre size.
Troubleshooting:
ELE SYS - 134
SHIVER 900