System Overview

System overview

General




The start inhibition system is a comprehensive function of the vehicle security system. The logic for start inhibition is in the engine control module (ECM). The system for start inhibition reads off a number of values from the controller area network (CAN). These values are used to determine whether the criteria for the engine control module (ECM) to activate the starter motor are met. The system for start inhibition reads off whether the immobilizer check is OK or not. For further information, see Function Function
There are a number of functions in the car's security system:
- Immobilizer
- Steering wheel lock
- Key lock
- Key warning.
- Alcolock (option 2009-)
- Remote-controlled immobilization (2010-, option, only certain markets)
The various functions depend on different control modules and components.

The following are included in the immobilizer system:
- Central electronic module (CEM)
- Keyless vehicle module (KVM) (only vehicles with the keyless entry system)
- Start control module (SCU)
- Steering Column Lock Module (SCL) (does not apply to USA/CDN market for 2009-).
- Engine control module (ECM)
- Brake control module (BCM)
- Driver information module (DIM)
- Phone module (PHM) (only vehicles with remote-controlled immobilization).

The following are included in the steering column lock system:
- Central electronic module (CEM)
- Steering Column Lock Module (SCL) (does not apply to USA/CDN market for 2009-).
- Engine control module (ECM)
- Brake control module (BCM)
- Transmission control module (TCM)

The following are included in the key lock system:
- Central electronic module (CEM)
- Start control module (SCU)
- Transmission control module (TCM)

The following are included in the key warning system:
- Central electronic module (CEM)
- Driver information module (DIM)

The alcolock system (option 2009-) includes:
- Central electronic module (CEM)
- Driver information module (DIM)
- Remote Receiver Module (RRX)
For further information about the different functions, see: Function Function

Definitions:
Activated system: The system means that the vehicle cannot be started.
Deactivated system: Key check has been carried out and the key has been approved. The system permits the car to start.

Signals
The tables below summarize the input and output signals to the units in the system for the immobilizer. The signal types are divided into directly connected signals, serial communication and controller area network (CAN) communication.