Engine Control Module (ECM), Coding

NOTE:
- A 5-character code must always be displayed during the control module identification.
- The control module must be recorded if the vehicle relevant coding is not displayed or the control module has been Replaced.


Special tools and equipment
- Scan tool VAG 1551 with cable VAG 1551/3

Work sequence
- Connect the scan tool VAG 1551 (VAG 1552). Then switch ignition on and select engine control module with the "Address word" 01.

(Connecting scan tool and selecting engine control module). Refer to "VAG 1551 Scan Tool" [1][2][3][4][5]Connecting VAG 1551 Scan Tool

Indicated on display:


Rapid data transfer HELP
Select function XX


- Press keys 0 and 7 for the function "Code control module" and confirm entry with Q key.

Indicated on display:


Coding control module Q
Enter code number XXXXX (0-32000)


- Enter the relevant code number for this vehicle and confirm with Q key.

Coding variations.

Display indicates control module identification and coding, e.g.:


06A906032CM 1.8L R4/5VT G 0001 ->
Coding 06530 WSC 00000


Indicated on display when a non-authorized code number has been entered.


Function is not recognized or cannot ->
be performed at the moment


- Press the -> key.
- Press keys 0 and 6 for the "End output" function and confirm input with the Q key.
- Switch off ignition.


NOTE: The code module entered and shown on the display will not be used by the Motronic control module until the ignition has been switched off Once, An incorrect coding leads to:
- Engine running faults (gear change jerks, load change jerks, etc.).
- Increased fuel consumption
- Increased exhaust gas emissions
- Faults stored in DTC memory which are not actually present
- Functions will not be performed (Oxygen sensor control, activation of the activated charcoal filter system, etc.).
- On front wheel drive vehicles the traction control will not function (TC warning lamp comes on)
- Reduced transmission life


Engine Control Module, Coding Variations







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