The ignition and recharging circuit comprises the battery, starter motor and alternator.

The battery (12V) is low maintenance type.

The starter motor consists of a d.c. motor supplied by the battery and an excitation electromagnet.

When the ignition key is turned as far as it will go (AVV), the motor windings are supplied to generate the electromagnetic forces that are used to turn the starter motor pinion. This simultaneously activates the electromagnet that operates the mechanism, which causes the pinion to mesh with the flywheel ring gear and thus turn the crankshaft.

The alternator recharges the battery during normal engine rotation.

The alternator shaft (rotor) is turned by the crankshaft via a belt. When supplied by an excitation current, the rotor generates a magnetic field that sets up an alternating current in the fixed winding (stator).

A diode rectifier bridge at the back of the alternator allows the alternating current to be transformed into a direct current that is sent to recharge the battery.

A voltage regulator built into the alternator maintains the power supply at a constant voltage (around 14 V) throughout all load variation and engine speed ranges.

Recharging system efficiency is controlled by the Body Computer, which measures the D+ signal from the alternator with the engine running.

If the voltage measured is insufficient, the warning light in the instrument panel is switched on as well as the display of a message.

On request, an upgraded alternator (150 A) for connection to oversized cable cross-sections may be fitted.