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 for fuse
F3 of the engine compartment unit B1 and sent to
pin 76 of connector B of M54 (start-up request signal).
However, start-up only occurs in the presence
of an enablement signal - from pin 42 of connector A of the robotized
gearbox control unit
M54. This excites start-up enablement relay
T20 located in engine bay control unit B1: the relay - supplied
with ignition on (15/54) from a line protected by fuse F16 of
B1 - sends a power supply to pin 50 of 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.