Engine Control Module (ECM), Coding

Code Control Module (Function 07)

NOTE:
- During control module identification, a 5-digit code must always be indicated.
- If control module does not indicate coding corresponding to vehicle, or if control module has been replaced, code it as follows.

Special tools and equipment
- VAG1551 Scan Tool (ST) with VAG1551/3B cable

Procedure
- Connect VAG1551 scan tool (VAG1552). Then switch ignition on and select the Engine Control Module (ECM) using address word 01.

Connecting scan tool and selecting ECM.

Indicated on display:


Rapid data transfer HELP
Select function XX


- Press 0 and 7 for the function "Code Control Module", and then press Q to exit from input mode.

Indicated on display:


Code control module
Enter code number XXXXX (0-32000)


- Enter appropriate code number for this vehicle, and press Q to exit from input mode.

Coding versions:


NOTE: The code number is put together as shown in the following example:







Display will indicate the control module identification and the coding, e.g.:


022906032C MOTRONIC ME7.1 GV003 ->
Coding 00013 WSC 00000


If this is indicated on the display, an unapproved code number has been entered.


Function is unknown or can ->
not be performed at the moment.


- Press the -> button.
- Press buttons -0- and -6- to select "End Output" function 06. Press -Q- button to confirm input.
- Switch ignition off.
- Check DTC memory, repair any malfunctions and then erase DTC memory.


NOTE: The Motronic control module uses the coding indicated on the display only after the ignition has been switched off once. Incorrect coding causes:


- Driveability problems (shifting pressure, tip-in shock etc.)
- Increased fuel consumption
- Increased emissions values
- The storage of non-existent malfunctions in DTC memory
- Necessary functions not being performed (oxygen sensor regulation, activation of the EVAP canister system, etc.)
- Reduction in transmission service life