APRILIA MSS Mana GT ABS Service Station Manual page 92

Electrical system
REMOVAL
LOCATION ON THE VEHICLE:on the fork, left
side, under the parking brake calliper support.
CONNECTOR LOCATION (if available): under
the saddle, right side.
PINS
•
PIN 1- Ground connection (yellow)
•
PIN 2 - Power supply voltage/Output
signal (yellow/brown)
NAVIGATOR
Parameters: Speed (km/h) - Vehicle speed.
ELECTRICAL ERRORS
Speed sensor
5DA0 electric malfunction:Electrical fault in sensor or cable harness.
Troubleshooting:Check the sensor connector and the ABS control unit connector. If they are not OK,
restore the connectors. If they are OK, check continuity of the yellow/brown cable between PIN 2 of the
sensor on the cable harness side and PIN 11 of the ABS control unit connector. If there is no continuity,
restore them. If there is, PIN 2 of the sensor on the cable harness side, with the sensor disconnected
and key set to ON, must have 12V voltage approximately: if there is no voltage, check PIN 2 for continuity
with the vehicle ground connection: if it is grounded, restore the cable harness. If OK, replace the control
unit. If PIN 2 has approx. 12 V, check continuity of the yellow cable between PIN 1 of the sensor on the
cable harness side and PIN 12 of the ABS control unit connector. If this is not OK, restore the cable
harness. If it is OK, replace the sensor.
LOGIC ERRORS
Speed sensor
5DA1 the signal works irregularly: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.
5DA2 the signal decreases periodically: Possible tone wheel fault due to deformations or dirt; pos-
sible alterations on the wheel bearing surface. 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.
5DA3 no signal or speed measured too low in relation to the front 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.
ELE SYS - 92
MSS Mana GT ABS