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Starting system (SCL), brief description

Starting system (SCL), brief description

Overview



Starter motor (4)

Column Integration Module, CIM (703a)

Engine Control Module (ECM)

Unit, ignition switch, ISM (20)

Transmission range switch/immobiliser switch, automatic (245/77)

Switch, coupling, immobiliser (411)

Relay, +50 (517)

Underhood Electrical Centre, UEC (342)


Description

Starter motor

When the engine is started and the engine speed exceeds the starter motor rpm, the pinion is disengaged from its shaft via a free wheel. This prevents the starter motor from overrevving.

The starter motor is fitted on to the engine block. A solenoid engages a pinion with the ring gear on the engine flywheel.

Ignition switch

The starter motor is activated when the ignition key is in the Start position. The ignition lock unit reads the key transponder code and sends this on the K-line to the steering column control module (CIM).

Column Integration Module

When the transponder code is approved, the steering column module (CIM) sends a signal to the ignition switch to allow the key to turn.

Engine control module

Once the control module receives a ready signal from CIM via a bus message, it grounds the starter relay control coil. All conditions for immobilization must be fulfilled before the CIM can send a ready signal to ECM. See Immobilization .

Gear selector, automatic

The gear selector on cars with automatic transmission allows start only when the selector lever is in position P or N.

Starting interlock contact, clutch pedal

Some cars with manual gearboxes made for the US/CA market are equipped with a contact for the clutch pedal that does not allow the car to be started unless the pedal is in the depressed position.