3315695 - E5010 STARTING AND RECHARING - Functional description

Functional description

Engine start-up via starter motor A20 is controlled by start-up enablement relay T20 located in engine compartment junction unit B1. The relay is supplied by the battery via fuse F3 of B1. The ignition switch H1 also receives a supply from the battery via line for fuse F3 of B1. 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 T20 is energized via the diode M11 which supplies the solenoid winding (pin 50) of the starter motor A20.

Functional description

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 . Pin 30 of A20 , the actual starter motor, is supplied with voltage directly from the battery via terminal unit A5 . this supply is interrupted by the SCB device for MAXIFUSE box B99 if the inertia switch I50 is operated. 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 (15/54) passes through fuse F6 of junction unit B2 and relay T1 to pin 15 of connector A.