September, especially if it is as rainy as this year, is always a real detonator of electrical problems in any used car, regardless of brand and status. Alas, wires tend to wear out, glasses tend to leak, and no one has cancelled the consequences of the legendary Russian winter reagents. In tandem, this leads to the fact that even initially reliable cars can depict to their owner "Christmas garland" on the dashboard. And the most popular and frequently occurring light in the long list of faults would be, of course, the yellow icon of ABS.
The ABS system, a must-have feature in a car since some time, is designed to prevent the wheels from locking and, therefore, from losing control when braking. It consists of an electronic control unit, valves in the braking system and sensors on the wheels themselves. Practice suggests that they, the sensors, are most often the cause of the warning lamp on the dashboard.
Complicating matters is the fact that modern cars have a great variety of options on the ABS sensor - the anti-skid system, four-wheel drive and even the parking brake, for example - so the failure of the node can disable not only the anti-blocking function, but also a number of others related to it.The sensors installed in the hubs need to be taken out and cleaned periodically. With time and without care, they simply rot, crumble or turn to stone. Naturally, the contacts, which are in constant contact with water, oxidize. Alas, ABS sensor cleaning or diagnostic is not prescribed in repair manuals and service recommendations, that's why it is up to the car owner. But it is necessary to check them regularly.
The most popular cause of lamp actuation is a rotted wire or an oxidized contact. In this case, the repair can be done independently, having cleaned and patched up the affected unit, and the replacement of the wiring will cost inexpensive - about 1000 rubles. The sensor itself fails much less often and much later, so a check with a voltmeter will most likely show that the problem is in the contact, but not in the node.
The main enemy of the node, besides moisture, is, of course, winter salt and reagents. They quickly destroy the braid and already in the second or third year of operation begin to destroy the wiring.