Advanced Driver Automatic Safety (ADAS)
ADAS stands for Advanced Driver Automatic Safety. This is a term that encompasses a number of safety, stability and control systems integrated to modern vehicles. While the design of these systems is largely manufacturer specific, there are only a select handful of sensor and actuator component suppliers. With varying integrations, the foundation of these new features largely remains the core ABS drivers have grown accustomed to.
There are two ways for an ADAS system to be calibrated. One method involves using targets mounted to a fixture at precise distances form the sensors. The targets have patterns, that are usually vehicle specific, the camera recognizes or that can reflect the beam. The re-calibration process is initialized with a scan tool. The other method that is proving promising is dynamic calibration, more simply referred to as “self-learning” systems. The self-learn process still requires activation with a scan tool and and sometimes predefined test drive scenarios.
Cameras Under Glass
Most higher-level vehicles equipped with ADAS have a camera mounted behind the windshield for features such as lane departure, automatic braking and even autonomous steering. If the windshield is replaced as part of a repair, some of the sensors may need to be re-calibrated. A trained professional will need to use a scan tool to verify operation and calibrate the camera using the correct procedures and proper tooling. This applies even if the camera was NOT replaced.
Steering Angle Sensor
If a vehicle has ABS and stability control, it most certainly has a steering angle sensor somewhere on the steering column. This sensor supplies data that is core to the proper performance of most all the ADAS functions. If data from the steering angle sensor is not plausible or missing, it will deactivate almost every active safety system on a vehicle.
Lane Departure Warning
Abbreviated LDW on most dash boards, lane departure warning is one of the most common of the newer ADAS features.
Automatic collision detection and avoidance is the most touted benefit of the ADAS systems.
Blind Spots Sensing
Blind-spot monitoring on late-model vehicles is often the first exposure to ADAS we have as drivers. Most use lights in the side mirrors or pulse-sense (i.e. seat or steering wheel) for communicating to the driver an object is in the blind-spot. Usually, blind-spot systems have sensors located on each side of the rear bumper cover. The sensors use a low-energy radar to determine the presence of objects nearby. Excessive dirt and buildup, damage, or a body shop painting over the sensor lens can hinder its performance. When the vehicle’s computer senses an issue with the system, it can present a message to the driver via the information display and also store a diagnostic code in the computer’s memory.