198000317 - E1010 POWER SUPPLY SYSTEM - FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

All electrical systems and circuits are supplied by battery A1.The main supply lines are protected by maxi fuses in the maxi fuse box on the battery B99, in particular:- F71: underfacia junction unit B2 supply;- F72: electric steering control unit supply M86    See E7045 ELECTRIC STEERING The supply for the engine compartment junction unit B1 - connector X - is direct.From there the junction unit under the dashboard B2 and the boot junction unit B45 are supplied via maxifuse F2; the ignition switch H1 is supplied via maxifuse F3There is an additional fuse box B98, next to the maxi fuse box on the battery on one side of the actual battery, with two MIDI maxi fuses which supply the additional heater.    See E6015 ADDITIONAL HEATERPower distribution to the vehicle (INT "ignition-operated, INT/A, "AVV", etc) is managed by the engine compartment junction unit B1 which is connected to ignition switch H1:- ignition switch H1 is supplied via maxifuse F3 of junction unit B1;- ignition switch H1 sends the ignition-controlled signal "15/54" to pin 30 of connector A of B1; the "INT" line, on the other hand, supplies the junction unit under the dashboard B2 - pin 11 of connector H;- ignition switch H1 sends the "AVV" signal which supplies the starter motor    See E5010 STARTING AND RECHARING - several circuits are disconnected in this position (INT/A line): pin 1 of connector H of the junction unit under the dashboard B2.