APRILIA RSV4 RR Service Station Manual page 156

Electrical system
Value drawn from the signal read without taking
into account any recovery
CAUTION
PAY ATTENTION TO THE POSITIVE BATTERY CABLE,
WHICH MUST PASS BELOW THE UPPER PART OF THE
FRAME.
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.
DIAGNOSIS INSTRUMENT: LOGIC ERRORS
Battery voltage P0560
•
too high/too low
Error cause
•
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
VEHICLE FRONT SPEED SENSOR
Function:
To generate a signal that the ABS control unit con-
verts into wheel speed.
Operation / Operating principle:
Magnetoresistive sensor: a square-wave pulse is
generated with width of approximately 1V across
PIN3 and PIN6.
Electrical circuit diagram - Level in wiring dia-
gram:
Traction control.
ELE SYS - 156
RSV4 RR/RF