Voltage Regulator Check; Recharge System Voltage Check; Choke Inspection - PIAGGIO XEVO 125 Euro 3 Service Station Manual

XEVO 125 Euro 3

Voltage regulator check

With a perfectly charged battery and lights off,
measure voltage at the battery poles with a high
running engine.
The voltage should not exceed 15.2 Volt.
In case higher voltages are detected, replace the
regulator.
In case of voltage values lower than 14 Volt, check
the stator and the corresponding cable harness.

Recharge system voltage check

Connect an ammeter induction clamp to the volt-
age regulator positive terminal, measure the bat-
tery voltage and turning on the vehicles lights with
engine off, wait for the voltage to set at about 12
V. Start the engine and measure the current gen-
erated by the system with lights on and a high
running engine.
In case the generated current value is lower than
10A, repeat the test using a new regulator and/
stator alternatively.

Choke Inspection

Refer to the engine section to check the resistance
and operating conditions of the component. As re-
gards voltage supply, keep the connector connec-
ted to the system and check that the two terminals
receive battery voltage when the engine is on (see
figure).
If voltage is detected, replace the automatic starter
as it is surely failing.
If no voltage is detected, connect the multimeter
negative terminal to the ground lead and the pos-
itive terminal to the automatic starter orange cable;
with the key switch set to «ON» check whether
there is battery voltage; if there is no voltage,
Electrical system
ELE SYS - 17