Engine Control Module: Testing and Inspection

Control Module, Coding


NOTE:
- If the correct coding for the vehicle is not displayed, or if the control module has been replaced, the control module must be coded.
- The code table is valid for current chassis forms of the Audi A6 as well as for the off road version "All road".


- Connect vehicle diagnostic, testing and information system VAS5051 or VAG1551 scan tool and select engine electronics control module by entering address word "01". When doing this the ignition must be switched on. Connecting VAS 5051 Scan Tool

The display of VAG1551 will show the control module coding (example).


4B0907551.. 2.7 L V6/5VT G 0002 ->
Coding 06712 WSC 06388


The relevant vehicle coding must be displayed, note coding table.

Coding variations of Engine Control Module (ECM).







NOTE:
- TLEV Transient Low Emission Vehicles. ESP = Electronic Stability Program
- If the vehicle is equipped with ESP can be identified at the ESP switch in the dash panel
- Anti Slip Regulation is often abbreviated as "ASR ". Electronic Stability Program is abbreviated as "ESP"
- Check for ESP switch in the center console to determine whether the vehicle is equipped with ESP.
- Audi allroad vehicles are always equipped with ESP On the third digit of the control module coding the Engine Control Module (ECM) is informed about whether a post-switch stage (low range) is installed (characteristic: Switch for post-switch stage at shift handle). This differentiation is required on vehicles with manual transmission. All road vehicles with automatic transmission never have a post-switch stage.
- For standard Audi A6, notes regarding post-switch stage (also in code table) can be disregarded.

Indicated code number consists of the following (example):







NOTE: TLEV = Transient Low Emission Vehicles. ESP = Electronic Stability Program


If an incorrect coding is displayed:
- Press -> button.

When indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons "07" for the function "Code Control Module" and press Q button to confirm input.

When indicated on display


Code Control Module Q
Input code number XXXXX (0-32000)


If this message appears:


Function unknown or ->
Cannot be carried out currently


Check in parts catalog if the correct control module has been installed (part number; possibly the control module cannot be coded). It also possible that an incorrect code number was entered. If necessary repeat coding.

- Press -> button.

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -6- to select function "End Output" and confirm entry with -Q- button.