VESPA 946 E4 EMEA 2021 Manual page 96

Electrical system
ground on the serial line. Under normal operating
conditions, after switching to «ON», the voltage
read with a multimeter has medium values equal
to 6-7 V.
In case of code 1, the voltage will be about 11V
high. Detecting this condition, disconnect the con-
nector from the injection control unit and repeat the
control.
CAUTION
IF THE VOLTAGE ON THE SERIAL TURNS TO 0 VOLT, THE
ANTENNA IS CERTAINLY DAMAGED. OTHERWISE IF DE-
TECTING HIGH VOLTAGE, THERE COULD BE A DAMAGE
INSIDE THE CONTROL UNIT.
Diagnostic code - 2 flashes
A two-flash code shows a system where the con-
trol unit does not show the transponder signal. This
might depend on the inefficiency of the Immobilizer
antenna or the transponder.
Turn the switch to ON using several keys: if the
code is repeated even with the Master key, check
the antenna wiring and change it if necessary. If
this is not the case, replace the defective key and/
or reprogram the control unit. Replace the control
unit if the problem continues.
Diagnostic code - 3 flashes
A three-flash code indicates a system where the
control unit does not recognise the key. Turn the
switch to ON using several keys: if the error code
is repeated even with the Master key, replace the
control unit. If this is not the case, reprogram the
decoder.
Battery recharge circuit
The charging circuit consists of three-phase alternator and a permanent magneto flywheel.
The alternator is directly connected to the voltage regulator.
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Vespa 946 E4-E5 EMEA-USA-ASIA (2021-)