APRILIA TUONO V4 R 2010 Service Station Manual page 147

TUONO V4 R
•
If too high: too high a voltage has been detected at PIN 42. If too low: too low a voltage has
been detected at PIN 42. The instrument panel does not indicate the presence of this error
even in the ATT status.
Troubleshooting
•
If too high: check correct operation of the voltage regulator.
•
If too low: check voltage regulator connectors, engine - vehicle cable harness connector and
the control unit connector (paying special attention to possible oxidation): if not OK, restore;
if OK, check that red/white cable resistance from the voltage regulator connector to the
control unit connector is a few tenths of Ohm: if not OK, restore cable harness; if OK, check
correct operation of the electrical alternator: if not OK, restore; if OK, check operation of the
voltage regulator
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 gener-
ated with voltage between 10 V and 0 V with metal
ground near the sensor V
Level in wiring diagram:
Speed sensor
Location:
•
sensor: on rear wheel fork, right side
•
connector: on right side rear frame
(three-way white connector)
Pin out:
1. Power supply voltage (12V)
2. Output signal
3. Ground connection
DIAGNOSIS INSTRUMENT: PARAMETERS
Vehicle speed:km/h
CAUTION
BEFORE CARRYING OUT ANY TROUBLESHOOTING,
CAREFULLY READ THE GENERAL TROUBLESHOOTING
CONCEPTS FOR ELECTRICAL DEVICES AT THE BEGIN-
NING OF THE CHECK AND CONTROL SECTION IN THE
ELECTRICAL SYSTEM CHAPTER.
WARNING
Electrical system
ELE SYS - 147