APRILIA RS 125 Euro 4 Service Manual page 126

Electrical system
Electrical circuit diagram - Level in electrical
circuit diagram:
ABS system
Position on vehicle:
On LH stanchion of fork, near the brake calliper
mounting bracket
CAUTION
THE DISTANCE BETWEEN THE ABS SENSOR AND THE
PHONIC WHEEL MUST BE BETWEEN 0.3 mm (0.012 in)
AND 2 mm (0.079 in).
Position of connector (if applicable):
Inside the chassis, on the RH side, near the battery.
Pin-out:
•
PIN1 - Power feed negative/Signal negative (white)
•
PIN2 - Power feed positive/Signal positive (white/brown)
Diagnostic tool - Parameters and statuses
•
Vehicle speed - (km/h)
Diagnostic tool - Errors
C1024 Comparison of front and rear wheel - Excessive difference.
Error cause
Incorrect wheel or tone wheel dimensions.
Troubleshooting
- Check the type and dimensions of the installed tyres.
- Check the type and dimensions of the installed tone wheels.
C1033 Front wheel speed sensor electrical diagnosis - open circuit, shorted to negative or shorted
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:
•
between PIN 3 of the ABS control unit and PIN 1 of the sensor (white cable)
•
between PIN 12 of the ABS control unit and PIN 2 of the sensor (white/brown cable)
Short-circuit to negative:
- Disconnect the sensor connector.
- Check the ground insulation of the two PINs.
ELE SYS - 126
RS 125 - Tuono 125 - Euro 4