Calibrating adaptive cruise control — AUDI

🧭 Before you start

Fits: Audi A6/A7 C7 (4G, 2011–2018); platform code 4X

• Special tools named: VAS 6430

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• Distance (A) = 120 cm ± 2.5 cm, measured from ACC reflective mirror, AudiVAS 6430/3 to surface of Audi rings.Do not take hold of the cross bar when moving the VAS 6430.
• In area (A), align number (2) on rotary knob with mark on mirror (number 2 on rotary knob must face vehicle).

📋 Procedure

1. Attach quick-release clamps to rear wheels.
2. Attach wheel alignment sensors to rear wheels.
3. Carry out wheel rim runout compensation for rear wheels.
4. Connect battery charger Electrical system27Battery; Charging battery.
5. Set front wheels to straight-ahead position.

6. Connect up vehicle diagnostic tester to vehicle and run diagnostic cable out through open window.
7. Switch off exterior lights on vehicle.
8. Close all vehicle doors.
9. Press button to select ACC adjustment procedure in wheel alignment computer. [Note: This step is necessary if you have not already adjusted/calibrated the camera for the night vision system.If the camera for the night vision system has already been adjusted/calibrated, it is not necessary to re-position the ACC setting deviceVAS 6430.] [Note: Before performing ACC adjustment, check that the two sensors for adaptive cruise control and their brackets and fasteners are properly secured and inspect them for signs of impacts and/or extraneous damage. Service any damaged components as necessary. Similarly, check that the front bumper cover is securely attached and inspect for damage and cracks. Service any damaged components as necessary.]
10. Detach air intake grille (1) (both sides) General body repairs, exterior63Bumper (rear); Removing and installing attachments.
11. Remove any dirt from sensor lens.
12. Connect vehicle diagnosis, testing and information systemVAS 5051 B to vehicle. (Run diagnosis cable through open window.)
13. Position ACC setting deviceVAS 6430 so that distance (A) is attained between ACC reflective mirror, AudiVAS 6430/3 (in centre position) and Audi rings. [Note: Distance (A) = 120 cm ± 2.5 cm, measured from ACC reflective mirror, AudiVAS 6430/3 to surface of Audi rings.Do not take hold of the cross bar when moving the VAS 6430.]
14. Attach front wheel alignment sensors (1) to VAS 6430.
15. Fit ACC reflective mirror, Audi on right side next to vertical slide, as shown in illustration.
16. In area (A), align number (2) on rotary knob with mark on mirror (number 2 on rotary knob must face vehicle).
17. Set up VAS 6430 by moving it from side to side (arrows B).
18. Use adjusting screws (1), (2) and (3) to bring spirit levels (A) and (B) on VAS 6430 into horizontal position.
19. Using crank handle (arrow) on VAS 6430, set mirror (4) so that laser beam coincides with centre of sensor lens in vertical plane. If necessary, re-position mirror (4) laterally on cross bar so that laser beam coincides with centre of sensor lens in horizontal plane.
20. Set identical individual front axle toe values with fine adjustment screw (5).
21. Balance out spirit levels (2) on wheel alignment sensors (1).
22. Then check again that laser beam (3) from VAS 6430 coincides with sensor lens. [Note: VAS 6430 is correctly aligned if the laser beam still coincides with the sensor lens at this stage, after the identical toe values have been set.The alignment of VAS 6430 must be repeated if the laser beam does not coincide with the sensor lens.]
23. Switch on diagnostic tester.
24. Switch on ignition.
25. Touch the Guided Fault Finding button on the display screen.
26. Select the following:
27. Confirm the entered information.
28. Press the Go to button and select the option "“Function/component selection”".
29. Select the relevant program in "“Guided Functions”".
30. For fine adjustment of adaptive cruise control unit J428 in "“Guided Functions”", use screws (1) (bottom) and (2) (top).
31. For fine adjustment of control unit 2 for adaptive cruise control J850 in "“Guided Functions”", use screws (1) (bottom) and (2) (top).
32. ⚠ ACC adjustment is not completed until diagnostic tester displays "“Final control element diagnosis ended”". — Switch off ignition.
33. Detach connector of diagnosis cable at diagnostic connection.
34. Disconnect battery charger Electrical system27Battery; Charging battery.
35. Install air intake grille General body repairs, exterior63Bumper (rear); Removing and installing attachments.

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