APRILIA RSV4 RR Service Station Manual page 498

Braking system
- Check the type and sizes of the fitted tyres.
- Check the type and sizes of the fitted tone wheels.
C1031 Rear wheel speed sensor electrical diagnosis - open circuit, shorted to negative or shorted
to positive.
Error cause
Open circuit: an interruption of the circuit has been detected.
Shorted to negative: no voltage has been detected at ABS control unit PIN 14.
Shorted to positive: an excessive voltage has been detected at ABS control unit PIN 14.
Troubleshooting
The circuit is open:
- Perform the check of the connectors on the components and the ABS control unit.
- Check the good condition and the wiring continuity:
•
between ABS control unit PIN 14 and sensor PIN 1 (Yellow cable)
•
between ABS control unit PIN 13 and sensor PIN 2 (Yellow/Brown cable)
Shorted to negative:
- Disconnect the sensor connector.
- Check the ground insulation of the two PIN.
- If there is no insulation, restore the cable harness, otherwise replace the sensor.
Shorted to positive:
- Disconnect the sensor connector.
- Check the battery supply insulation of the two PIN.
- If there is no insulation, restore the cable harness, otherwise replace the sensor.
C1032 Rear wheel speed sensor functional diagnosis - signal not valid.
Error cause
Possible tone wheel fault due to deformations or dirt.
Troubleshooting
- Check the tone wheel is in good condition and that it is clean.
- Check that the number of teeth on the tone wheel is correct.
- Check the correct positioning of the tone wheel and the sensor.
- Check the correct size of the tyre.
- If all the above tested have a positive result, replace the sensor.
C1033 Front wheel speed sensor electrical diagnosis - open circuit, shorted to negative or shorted
to positive.
Error cause
Open circuit: an interruption of the circuit has been detected.
Shorted to negative: no voltage has been detected at ABS control unit PIN 3.
Shorted to positive: an excessive voltage has been detected at ABS control unit PIN 3.
Troubleshooting
BRAK SYS - 498
RSV4 RR/RF