Checking the voltage regulators
If a regulator is suspected of being defective, it should be repla-
ced, if possible, with one that is known to be in working order.
Alternatively, take a few measurements to determine whether it
is operating properly:
– While the engine is off, disconnect the regulator connector lo-
cated on the frame under the tank.
– Use a digital multimeter designed for measurements of up to
20,000 1.
Checking the charging voltage
NOTE: The following values should be regarded as valid only
when the battery is charged (minimum charge 90 per cent).
– Start the engine and turn on the low beam.
– Connect a voltmeter to the two battery connections.
– Rev the engine to 5000 rpm and read the voltage.
Nominal value: 14.0 - 15.0 V
If the measured value differs considerably from the nominal va-
lue, follow these step:
– Check the plug between the stator and the regulator-rectifier
and the plug between the regulator-rectifier and the wiring
harness.
– Check the stator.
– Replace the regulator-rectifier.
1 2 3 4
1
2
3
4
/
' ' '
/
/
/
' '
'
'
'
'
'
' '
Puntale ROSSO
Puntale NERO
'
= Corrisponte all’indicazione che fornisc
il tester quando i terminali ROSSO e NERO no
sono in contatto tra di loro.
7
11 - Electrical system Release 00 Date 02/2005
RED probe
BLACK probe
' = Corresponds to the multimeter reading when
the RED and BLACK terminals are not in contact
with one another.
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