System Overview

System overview

General







The purpose of the starter motor (6/25) is to turn the engine at start-up. The starter motor is positioned on the side of the cylinder block towards the transmission. A solenoid engages a pinion with the gear collar on the flywheel / flange of the engine. When the engine is started and the engine speed exceeds the starter motor speed, the pinion disengages. This prevents the starter motor over-revving.

This type of starter motor is equipped with permanent magnets instead of field winding (except for the V8 engine whcich has field windings).

The starter motor gives the greatest torque at low rpm at the same time as the voltage current through the starter motor is greatest.

NOTE: The engagement time for the starter motor must not exceed 20-30 seconds. Longer engagement time results in the starter motor overheating and becoming damaged.

The starter motor solenoid is controlled by a starter motor relay (2/35). The relay, in turn, is controlled by the ignition switch (3/1) together with either the central electronic module (CEM) (4/56) or the engine control module (ECM). The engine management system of the vehicle determines whether the starter motor relay is regulated by the central electronic module (CEM) or the engine control module (ECM). For information on connection, see the wiring diagram.