Calibration of driver assistance systems after suspension work
Advanced driver assistance systems (ADAS) are becoming increasingly common in modern cars. With their profound expertise, workshops play a decisive role in ensuring that their function is fully guaranteed even after modifications and repair of the suspension. It is often necessary to teach the ADAS with regard to the new control situation. A good and practical example is the installation of sports suspensions, as offered also by BILSTEIN: https://www.repxpert.co.uk/en/schaeffler-products#!/products//Chassis/Suspension~2FDamping. However, this also applies to the mere installation of shock absorbers or springs.
Another interesting problem that can also occur after the installation of suspension components are noises that are difficult to localise. REPXPERT hast two practical tips for this problem:
Which assistance systems usually require calibration?
Calibration is particularly necessary for cars with automatic headlight range adjustment, electronic damping force adjustment, lane departure warning or distance control. Only in this way can the on-board sensors correctly detect the new control position. Otherwise, they react independently to changed conditions after conversions and often come to the wrong conclusion: if the vehicle is lower, for example, the height sensors may detect a deviation from the normal position and attribute this to a heavy load. Furthermore, yaw rate, wheel speed, radar and lidar sensors as well as the front camera can be irritated.
By the way, when installing new shock absorbers, it is often not only the driver assistance systems that need to be “calibrated”. For more information, see our practical tip on groove adjustment: https://www.repxpert.co.uk/en/garage-tips/bilstein-shock-absorber.
After which work is calibration necessary?
- After removal/installation of shock absorbers or suspension
- After removal/installation of height sensors, control arms, unit carriers
- After replacement of control units
Example for lowering: What work steps are required and when?
- Tighten the fastening screws of the suspension components so that they are stress-free
- Perform a test run for settling
- Wheel alignment & adjustment according to manufacturer’s specifications
- Calibration of the assistance systems relevant for the suspension
Which malfunctions are to be expected?
Damping force tuning: Permanent setting of firmer characteristics. This means that almost no change is recognised in the different driving modes.
Electronic headlight range adjustment: The light cone is too low and leads to poor visibility or is too high and blinds oncoming traffic.
Lane departure warning & distance control: The course of the road is detected incorrectly, regulation is too early or too late, display of error messages up to system safety shutdown.
If you have any further questions, please call the BILSTEIN Technical Support at
+49 2333 791-4222 or send an e-mail to email@example.com. Another interesting option are the training courses offered by BILSTEIN (now also virtually). Registration and further information by contacting the e-mail address firstname.lastname@example.org or https://workshop.bilstein.com/en/trainings-and-courses/.