3239426 - E5010 STARTING AND RECHARING - Functional description (Q-System)

Functional description

When the ignition key for the switch H1 is turned to the extreme position (AVV) [START], the solenoid winding (pin 50) of the starter motor A20 is supplied. This supply comes from the battery via the line of maxifuse IGN of B99 . This supply is only present if there is a safety signal - gear lever on P or N - coming from the unit on the gearbox L50 : this signal energizes the starting enablement relay J05 , so that it sends the supply to pin 50 of the starter motor A20 . Pin 30 of A20 , the actual starter motor, receives the voltage coming directly from the battery A1 . 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 and therefore not recharging the battery, an earth signal is sent from pin D+ to the rev counter module E15 , pin 7 of connector B. Module E15 receives a supply controlled by the ignition (INT) at pin 15 of connector A from the line protected by fuse F4 of the additional fuse box B98B : when this signal arrives, the 'recharging' warning light comes on. When the engine has been started up this signal becomes 12 V and the warning light goes out.