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

Fig 1: V.A.G 1551 Scan Tool Display - Checking Engine Control Module (ECM) Coding (1 Of 3)

• Press -Q- button to confirm input.

  Indicated on display (ECM identification and coding)

  Fig 2: V.A.G 1551 Scan Tool Display - Checking Engine Control Module (ECM) Coding (2 Of 3)

  
  ECM CODING AND MODEL
  
  

  Coding	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

Fig 3: V.A.G 1551 Scan Tool Display - Checking Engine Control Module (ECM) Coding (3 Of 3)

• Press buttons -0- and -6- to select "End Output" (scan tool function 06), and press -Q- button to confirm input.