Voltage Regulator Check; Cold Short Circuit Current - APRILIA RS4 125 Service Station Manual

Electrical system
RPM
RMS DC current (Arms) (average of the 3 stage
currents)
Voltage on battery poles with engine speed always between 3000 - 5000 RPM
•
Start the engine, after about one minute of operating bring the speed to 3000-5000 RPM,
then measure with a tester the voltage at the battery poles that must always be between
13V and 15V. Otherwise, if the correct operation of the alternator has already been checked,
replace the regulator.
CAUTION
PERFORM THE CHECK DESCRIBED ABOVE WITH A BATTERY IN GOOD CONDITION (START
VOLTAGE ABOUT 13V) MAKING SURE THAT THERE ARE NO ELEMENTS IN THE SHORT CIR-
CUIT.

Voltage regulator check

•
Output voltage 13.5 V - 15 V
•
Output current higher than 10 A (with
load)
ELE SYS - 102
C
OLD SHORT CIRCUIT CURRENT
2000
12 - 18
4000 6000
12 - 18 12 - 18
RS4 125
8000
12 - 18