Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
Test sequence
- If cruise control is inoperative on models with 1.9L TDI engine, check if system is activated. Refer to Cruise control system - 1.9L TDI, activating .
- If cruise control is inoperative on models with 1.8L Turbo engines, 2.8L VR6 engines and 2.0L engines, code AVH & AZG, check if system is activated. Refer to Cruise control system - 1.8L Turbo, 2.0L (codes AVH & AZG) and 2.8L VR6, activating .
- Press buttons -0- and -1- to select Address word 01: "Engine electronics".
Display will appear as shown (gasoline engine example only)
| 06A906018AB Motronic M5.9.2 HS V06 → Coding 00000 WSC 00000 |
- Press → button.
Display will appear as shown
| Rapid data transfer HELP Select function XX |
- Press buttons -0- and -8- to select Function 08: "Read measuring value block".
- Press -Q- button to enter input.
Display will appear as shown
| Read measuring value block HELP Input Display group number XXX |
For 1.8L, 2.0L and 2.8L gasoline engines:
- Press buttons -0-, -6- and -6- to select "Display group 66".
For 1.9L TDI engine:
- Press buttons -0-, -0- and -6- to select "Display group 06".
Continued for all engines:
- Press -Q- button to enter input.
Display will appear as shown
| Read measuring value block XX → 1 2 3 4 |
- Note values in display fields 2 - 4 and refer to the following engine type specific tables to interpret values:
- 1.8L Turbo and 2.8L VR6. Refer to 1.8L TURBO AND 2.8L VR6 & 2.0L (CODES AVH & AZG) .
- 2.0L (code AEG). Refer to 2.0L (code AEG) .
- 2.0L (codes AVH & AZG). Refer to 1.8L TURBO AND 2.8L VR6 & 2.0L (CODES AVH & AZG) .
- 1.9L TDI. Refer to 1.9L TDI .
- The road speed signal input to the ECM for cruise control function can be confirmed by performing a road test and observing that the km/h value indicated in display field 1 changes.
- Always observe the appropriate safety precautions during road test
Refer to 01 ON BOARD DIAGNOSTIC (OBD) for 1.8 LITER 4-CYL. 5V TURBO FUEL INJECTION & IGNITION, ENGINE CODE(S): AWD, 01 ON BOARD DIAGNOSTIC (OBD) for 1.8 LITER 4-CYL. 5V TURBO FUEL INJECTION IGNITION, ENGINE CODE(S): AWW, AWP, 01 ON BOARD DIAGNOSTIC (OBD) for 1.9 LITER 4-CYL. 2V TDI FUEL INJECTION GLOW PLUG, ENGINE CODE ALH, FROM MY 2002, 01 ON BOARD DIAGNOSTIC (OBD) for 1.9 LITER 4-CYL. 2V TDI FUEL INJECTION GLOW PLUG, ENGINE CODE: ALH, MY 1999-2001, 01 ON BOARD DIAGNOSTIC (OBD) for 2.8 LITER VR6 2V FUEL INJECTION IGNITION and 01 ON BOARD DIAGNOSTIC (OBD) for 2.8 LITER VR6 4V FUEL INJECTION IGNITION. .
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.