When the ignition key is turned in the switch
H1
to the extreme position (START) - pin 50 - the winding
of the solenoid - pin 50 - of the starter motor
A20
is supplied.
This supply comes from the battery via the
line of maxifuse IGN of
B99
.
However, this supply only occurs in the
presence of an enablement signal - from pin 42 of connector A of
the SELESPEED control unit
M54
(while pin 76 of connector
B of
M54
receives the starting request signal); the starting
enablement relay
J05
- supplied under the ignition (15/54)
by the line protected by the fuse F16 of the engine compartment unit
B1
- then sends the 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
through 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 - 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
E50
.