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Electrical system
Speed sensor
Function
To indicate the vehicle speed by reading the rear
wheel turning speed.
Operation / Operating principle
HALL effect sensor: a square-wave pulse is gen-
erated with voltage between 12 V and 0.3-0.4V
approx.
Level in electrical circuit diagram:
Speed sensor
Location:
•
Sensor: on swingarm, right side, near
the rear brake calliper
•
Connector: near the upper retainer of
the rear shock absorber
Pin-out:
1. Supply voltage (green)
2. Output signal (grey/white)
3. Ground (blue/orange)
PIN:
•
PINS 1-3 Voltage: approx. 12 V
•
PINS 2-3 Voltage: variable 0.4V-12V
(by turning the rear wheel)
AXONE: ELECTRICAL ERRORS
Speed sensor - invalid signal.
Error cause
•
Error signal if a speed below the default value set by the manufacturer for the running vehicle
is detected. Possibly shorted to ground, battery or speed sensor circuit open: lack of supply
from the control unit also possible.
Troubleshooting
CARRY OUT THE CASCADE OPERATIONS UNTIL THE FAILURE IS FOUND
•
Check correct position of the sensor in its fitting.
•
Check that the air gap thickness is correct (0.6 ÷ 2.2 mm - 0.024 - 0.087 in)
•
Check voltage between PINS 1-3 of the sensor. In case of null voltage, check continuity
between PIN 1 of the sensor and PIN 17 of the ECU BLUE connector.
•
Check PIN 17 of the BLUE connector.
ELE SYS - 60
STELVIO 4V - 1200
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