When ignition switch
H1
is turned
to the extreme position (AVV) - pin 50 - the solenoid winding is
energized - pin 50 - for the starter motor
A20
.
This supply comes from the battery via the
line of fuse
F3 of the engine compartment unit B1 and sent to
pin 76 of connector B of M54 (start-up request signal).
Starting, however, only takes place if there
is an enablement signal - from pin 42 of connector A of the robotized
gearbox control unit
M54: this energizes the starting enablement
relay T20, located in the engine compartment junction unit B1 and
the relay, with an ignition-operated supply (15/54) from the line
protected by fuse F16 of B1, sends a supply to pin 50 of the starter
motor A20.
The supply controlled by the ignition (15/54)
reaches pin 28 of connector A of
M54 See E7051 ROBOTIZED GEARBOX
.
Pin 30 of
A20
, the actual starter
motor, receives the voltage coming directly from the battery
A1
.
The direct current generated by the alternator
A10
(pin B+) is sent to the battery
A1
, passing through
the motor
A20
.
When the alternator does not turn, and so
does not recharge the battery, an earth signal is sent from pin
D+ to the Body Computer
M1
- pin 19 of connector A: this
is connected via the CAN line to the instrument panel
E50
and
manages, as described above, the switching on of the recharging
warning light on the instrument panel.