184002211 - E5010 STARTING AND RECHARGING - FUNCTIONAL DESCRIPTION (Robotized gearbox)

Operational description

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