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SCN Coding Function

Full variant coding

Special Functions

Injector coding and classification

Page 8


Autologic covers all vehicles from 1995 - 2011 Full technical specifications are available from www.autologic.com

SCN coding is used by an increasing number of ECU's as the method for coding. SCN coding replaces the old method of multiple options, where the user selects and edits each coding option. SCN coding codes the control module with predefined coding based on the VIN and part number.

has an SCN Coding fuction built-in, enabling the latest control modules on MERCEDES-BENZ vehicles.

users to code all

offers full variant coding on all modules. This gives users the ability to perform variant coding on any control module. Any new or existing control modules, can be coded to suit the options or requirements of that specific car. Retrofitting of components is also possible.


MERCEDES-BENZ tool provides special functions which the dealer

tool does not. Examples of these include TV activation and air bag unlocking


TVs by default, are restricted from being viewed whilst the car is in motion. Using

this limitation can be removed on a number of vehicles. Similarly, an airbag which is normally interlocked to a vehicle, can be unlocked to allow coding to be changed or the airbag fitted to another vehicle.

Injector coding / classification is an important function on the MERCEDES-BENZ software. This function will allow the user to replace the injectors for new and used parts and more importantly, the ECU will know the exact specification of the injector fitted. This process is critical as the IMA code is used by the controller to determine the injector fitted, which in turn determines how the fuel is delivered.

The WSP (Immobiliser) module has a unique method of coding the keys. This method requires the new key to be put in the ignition then a random generated number is

displayed on

and the correct code is then entered using

. All

vehicles fitted with a WSP will require this method to code new keys

Nick Cragg, SNS Liverpool Ltd, Liverpool, UK



Autologic covers all vehicles from 1989 - 2010 Full technical specifications are available from www.autologic.com

PORSCHE has full transponder key and key fob programming capability. New immobiliser modules can also be coded to the vehicle. Key and remote reprogramming can also be performed, eliminating the requirement to replace the the keys when replacing an alarm module.

Another feature is Control Module Substitution. This allows the user to trial a module from a donor car without locking it to the problem vehicle.

Trial substitution

Vehicle Handover is the process that initialises modules from their “In Transportation” state. The procedure is performed when new vehicles are delivered to customers and also after the replacement of certain ECUs.

A control module can be configured to function differently for various vehicle configurations. Examples include the language setting on the instrument cluster, roof operation from the key remote or the configuration of daytime running lamps. All new control modules need to be coded when first fitted to a vehicle. will determine the correct coding data based on the hardware fitted and the vehicle specification.

Many control modules are flash programmable. As part of on-going support, vehicle manufacturers periodically release updated software, often to overcome running

Instrument Cluster Replacement

issues. With updates as

PORSCHE, any workshop is in a position to carry out these is the only aftermarket diagnostic tool capable of full Flash


Mick Clare, Service Manager, Paragon, East Sussex, UK

Security System Programming

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