Some phenomena that occur during the diagnosis of the ABS system
Phenomenon | Explanation of the phenomenon |
Sound during system health check | When starting the engine, sometimes a dull sound may come from the engine compartment. This is a sign that the control procedures for checking the performance of the ABS system are being carried out |
Sounds of the ABS system | 1. The sound of the pump motor running inside the ABS hydraulic unit (howling sound).
2. Sound accompanied by vibration of the brake pedal (scraping). 3. During the operation of the ABS system, the sounds of the inlet part of the car as a result of periodically pressing and releasing the brake pedal (turning the brakes on and off). (thud: suspension: squeak: tires) |
ABS system operation (long stopping distance) | On gravel and snowy roads, the stopping distance of a vehicle with ABS may sometimes exceed that of a vehicle with standard brakes. Therefore, advise drivers not to be too confident and, for safety reasons, slow down when driving on such roads |
Pulsating feeling in the brake pedal | Pulsation in the brake pedal is a sign of normal operation of the ABS system |
* The phenomena listed in the table that occur during normal operation of the ABS system are not abnormal. The conditions for detecting faults during diagnostics may vary depending on the fault codes. When rechecking for symptoms (after clearing diagnostic trouble codes) make sure that the test conditions specified in «Comments» after the fault codes listed below.