APRILIA TUAREG 660 Service Station Manual page 117

TUAREG 660
Accelerate progressively until 5000 rpm and observe the maximum output current when the engine/
generator is cold.
Decrease the speed to approximately 3000 rpm or
anyway to close speeds that ensure stable rota-
tion.
During these checks, the generator is loaded with
the total power consumption of the vehicle and the
additional load until the total maximum output pow-
er is reached.
Wait a few minutes, checking that no sudden cur-
rent variations occur.
When the voltage regulator reaches the tempera-
ture, repeat the check at 5000 rpm, observing the
maximum output power with the hot generator and
stop the engine.
With the generator still hot, disconnect the addi-
tional load and check if the battery voltage or that
the regulator's output does not exceed 15 V for any
engine rpm.
If incorrect voltage values are detected, replace
the voltage regulator.
For vehicles with the voltage regulator placed far
from the battery, it is important to check both volt-
age values during the maximum output of the gen-
erator (the regulator's voltage and the battery
voltage).
Any difference of a few tenths of Volt must be con-
sidered normal, while more significant voltage
drops require checking and if necessary restoring
the proper conductivity of the wiring harness.
A significant voltage drop affects the proper re-
charge of the battery, while other components
maintain reasonable performance.
Regarding the voltage regulators, it is important to
remember that slight variations at the beginning of
the adjustment range are not considered faults
Electrical system
ELE SYS - 117