With the Passive Entry / Key Less Go option fitted, the steering is locked electronically and the car cannot be started. Electronic steering lock control unit M089 is supplied directly from the battery at pin 3, via a line protected by fuse F63 of boot junction unit B045If the steering is locked electronically, the contact of relay R20 inside engine bay junction unit B001 is open. In this way, starter motor A020 does not receive ignition signal "50" from ignition switch H001.Operate the clutch pedal to release the steering lock See E7065 ELECTRIC STEERING LOCKSimultaneously, the driver turns ignition switch H001 as far as it will go ( AVV ) - pin 50 .This signal is sent to short-circuiting junction D097 A ( pin 4 ), that distributes it to steering lock control unit M089 ( pin 4 ) to let the unit know that car ignition has taken place, and to the second terminal of the coil of relay R20. The potential difference set up across the coil excites the contact of relay R20, which closes to allow the electromagnet (pin 50) of starter motor A020 to be supplied with power.This power supply leaves battery A001 via a line protected by fuse F03 of engine bay junction unit B001. See E1010 SUPPLYPin 30 of starter motor A020 is also divided into 2 separate connectors: connector A receives a power supply directly from battery A001.The direct current generated by alternator A010 is sent from pin B+ to battery A001, through connector B of starter motor A020. If the alternator will not turn and thus charge the battery, an earth signal is sent from pin D+ to Body Computer M001 (pin 19 connector A).This is then connected via the CAN network to instrument panel E050, which displays an alternator fault message on the instrument panel display.The car is also equipped with a battery disconnection switch inside the maxifuse junction unit on battery B099.In case of accident, the car inhibits the power supply to the fuel pump by means of inertia switch I050. See E1010 SUPPLYThe control unit then forwards this negative signal to pin 34 of connector F leading to the coil of the above battery disconnector. The contact is thus opened to prevent distribution of a +30 supply from the battery to all electric components in the car.When the clutch pedal is pressed, electric steering lock control unit M089 activates the driver recognition procedure and sends a negative signal from pin 8 to the coil of engine bay junction unit relay R20.which, once open, causes an earth signal to be sent to boot control unit M063 (pin 33 connector F).