A triggering witness is by no means a good sign. We can believe that it is simply a problem related to sensors . Nevertheless, it is essential to pay attention to it. What is the role of ABS? Why is the light on? What to do? We will answer all these questions, so that you can drive the smart forfour safely.
What is ABS on a smart forfour
ABS stands for Anti Blocking System . It is a system which offers the possibility of improving braking, especially during intensive braking. Before the invention of ABS, the brake pedal was directly connected to the pads. When the pedal was depressed, the pads tightened on the discs. The disadvantage with this process is that there is a risk of slipping. Thanks to sensors, ABS assesses braking. Instead of being pressed on the discs, the pressure will vary various times in a very short time, thus avoiding a blocking overall tires for your smart forfour. No skidding, and braking becomes much more efficient.
smart forfour: why the ABS warning light is on
In the event that the ABS warning light comes on, it is certain that your smart forfour has a problem. As with all other LEDs, it is relatively common for this to be simply a contact problem. Having said that, it's better to be assured.
False contact
Reassemble the ABS sonar cables of your smart forfour and measure the electric current with a multimeter . If one of them does not have the same value as the others, it is because there is an electrical problem. Follow the wiring, if you discover a connection fault it will have to be repaired. If a cable is in bad condition, it will have to be changed.
A sensor problem
This is indeed a relatively common problem for a smart forfour. It happens that your sensor emits an erroneous message. Therefore, it will suffice to change the sensor in question. You will be able to control the sensors using a oscilloscope .
A problem with the hydraulic block
The ABS of your smart forfour works using a device hydraulic , which provides an opportunity to manage the strength of the brake pads. If this device is ever defective, replacement of the ABS unit is usually essential. In the event that this remains a block problem, you can often feel it when braking.
Conclusion
An ABS warning light that turns on can come from quite distinct causes. Whether it's a sensor problem, an electrical fault. Assumed that your ABS unit is defective, it will probably have to be changed. And this operation is relatively expensive, for a smart forfour or for any model of automobile. It is essential not to neglect an ABS witness, for obvious safety reasons. Leave us a comment if this special ABS witness article was useful to you. Enjoy again!