939011444 - E1010 POWER SUPPLY SYSTEM - FUNCTIONAL DESCRIPTION

FUNCTIONAL DESCRIPTION

All electrical systems and circuits are supplied by battery A1.The main power supply lines are protected by maxi fuses in the maxi fuse box on the battery B99, in particular:- CVM: engine compartment junction unit B1 power supply - connector X;- CPL: junction unit under the dashboard B2 power supply - to pin A of connector C;- CPR : glowplugs control unit power supply (for Diesel engines only)    See E5050 DIESEL ENGINES ELECTRONIC MANAGEMENT The B99 fuse box includes the automatic battery disconnection device which, in emergencies, cuts off the power supply to the engine starting/ recharging cable.    See descriptions 5530 CURRENT GENERATION For Diesel engines only, there is an additional fuse box B98, next to the maxi fuse box on the battery (on one side of the battery itself), equipped with two MIDI maxi fuses which supply the additional heater.    See E6015 ADDITIONAL HEATERThe following, amongst others, are supplied by the engine compartment junction unit B1:- the steering lock node M89 (which "replaces" the ignition switch), fuse F3;- the junction unit under the dashboard B2 and the one in the luggage compartment B45 fuse F1.The distribution of the power supply to the vehicle (INT ignition-operated, 15/54, INT/A, "AVV", etc.) is managed by the steering lock control unit, and takes place in exactly the same way as on models with a traditional key.The power supply for the M89 control unit reaches pin C1 of M89 from the line protected by fuse F3 of the engine compartment junction unit B1 whilst pin A4 of M89 is earthed.The TEG inserted status is sent by the TEG Reader H3 via the CAN - pins 3 and 8. The same signal is sent, redundantly, to the steering lock node M89, from pin 2 and the latter, in turn, forwards it via the CAN.With the TEG inserted, numerous ignition-operated circuits and services are supplied (lines INT and 15/54): lines leaving pins A1 and B1 of M89.With the TEG inserted, without starting up (INT/A line): other circuits and services are supplied: from pins B3 and C8 of M89.