Engine Control Module (ECM) coding, checking
If vehicle coding information is not as specified:
- Replace ECM.NOTE:
- Vehicle information is "hard coded" into the ECM. Service coding of the ECM is not possible.
- Coding versions may be checked (only) using the VAG1551 or VAG1552 Scan Tool (ST).
- While checking coding versions, the 5-digit ECM code must always be displayed.
- Connect VAG1551 or VAG1552 Scan Tool (ST) and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (ignition switched on). See VAG1551 OR VAG1552 SCAN TOOL (ST), CONNECTING AND SELECTING "ENGINE ELECTRONICS" ADDRESS WORD 01 .
Indicated on display
- Press -Q- button to confirm input.
Indicated on display (ECM identification and coding)
ECM CODING AND MODELCoding Model 01273 A8 4.2 liter, engine code ABZ 01153 A8 3.7 liter, engine code AEW - Advance program sequence by pressing button.
Indicated on display
- Press buttons -0- and -6- to select "End Output" (scan tool function 06), and press -Q- button to confirm input.