Engine Control Module (ECM), Coding

Engine Control Module, Coding


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


Special tools and equipment
- VAG1551 scan tool with VAG1551/3B cable

Work sequence
- Connect VAG1551 scan tool (VAG1552). Switch ignition on and select engine control module with "Address word" 01. (Connecting scan tool and selecting engine control module). Refer to "VAG1551 Scan Tool Tools and Equipment

Indicated on display


Rapid data transfer HELP
Select function XX


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

Indicated on display


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


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

Control module identification and coding are indicated on display e.g.:


06A906032DL 1,8L R4/5VT G 0001 ->
Coding 07500 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 -> key.
- Press keys 0 and 6 for "End output" function and confirm input with Q key.
- Switch ignition off.


NOTE:
The code unit 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 malfunctions (gear change jerks, load change jerks, etc.)
- Increased fuel consumption
- Increased exhaust gas emissions
- Codes stored in DTC memory which are not actually present
- Functions will not be performed (oxygen sensor control, activation of the Evaporative Emission (EVAP) system, etc.).
- On front wheel drive vehicles the traction control will not function (TC warning lamp comes on)
- Reduced transmission life


Coding variations of engine control module