3315693 - E5010 STARTING AND RECHARING - Functional description

Functional description

Engine start-up via starter motor A20 is controlled by start-up enablement relay J5. The relay is supplied from the battery via terminal unit A5 and start-up enablement MAXIFUSE B9. Ignition switch H1 receives battery power via the line of maxifuse ACC of B5 . When the ignition key for the switch H1 is turned to the extreme position (AVV) [START], if all the safety conditions are followed, the relay J5 is energized via the diode M11 which supplies the solenoid winding (pin 50) of the starter motor A20 . Pin 30 of A20 , the actual starter motor, is supplied with voltage directly from the battery via terminal unit A5 . A start-up signal - pin 50 of H1 is also directed to instrument panel E50 - pin 13 of connector A - whose internal software uses the information to set the system to 'engine running' status. (see E4010 INSTRUMENT PANEL) The start-up signal also reaches relay R1 , which supplies numerous ignition-operated lines (INT/A).(see also E1010 FUEL SYSTEM). The direct current generated by the alternator A10 (pin B+) is sent to the battery A1 through motor A20 . When the alternator is not turning, i.e. not charging the battery, an earth signal is sent from pin D+ to instrument panel E50 - pin 7 of connector A. Instrument panel E50 ingition-operated power supply (INT/A) passes through fuse F1 of junction unit B1 to pin 15 of connector A. With the engine switched off but the panel on (INT/A), the recharging warning light in the panel E50 is on because there is an earth signal at pin D+ of the alternator A10 . When the engine has been started up and the alternator is carrying out its recharging function, the warning light goes out because pin D+ has a +12V signal.