3363789 - E5010 STARTING AND RECHARING - Functional description (Smart gearbox)

Functional description

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 the maxifuse CVM of B99 and 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 SELESPEED 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 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 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.