APRILIA RSV4 RR 2017 Service Station Manual page 148

Electrical system
Speed sensor
FRONT VEHICLE ABS SENSOR
Function:
Generates a signal used by the ABS control unit
to determine the speed value of the wheel.
Operation / Operating principle:
Magneto-resistive sensor: generates a square
wave signal with an amplitude of approximately 1V
between PIN3 and PIN12 of the ABS control unit.
Electrical circuit diagram - Level in electrical
circuit diagram:
Traction control - Speed sensor
Position on vehicle:
On left-hand stanchion of fork, near the brake cal-
liper mounting bracket
Position of connector (if applicable):
Under the right dynamic air intake.
Pin-out:
•
PIN1 - Power feed negative/Signal
negative (white)
•
PIN2 - Power feed positive/Signal pos-
itive (white/brown)
DIAGNOSTIC TOOL
Parameters:
Speed (km/h) - Front wheel speed.
DIAGNOSTIC TOOL: ELECTRICAL ERRORS
C1033 Front wheel speed sensor
Electrical diagnosis:
Open circuit, short circuit to negative or short circuit to positive.
Error cause:
•
Open circuit: circuit interruption detected.
•
Short-circuit to negative: null voltage detected on PIN 3 of the ABS control unit.
•
Short-circuit to positive: excessive voltage detected on PIN 3 of the ABS control unit.
Troubleshooting:
Open circuit:
- Check the connectors on the component and on the ABS control unit.
- Check the integrity and continuity of the wiring harnesses:
ELE SYS - 148
RSV4 RR-RF