What are Warning Lights in Vehicles?

Warning Lights
Warning Lights are very important, they help to inform you about any malfunctioning in your vehicle. Any time they come on, make sure you try to solve such problem. Resolving issues with Warning Lights would help you save more money, time and stress of running up and down with your car problem; it also improves the performance and prolongs the lifespan of the vehicle. There are numerous warning Lights, although they are usually universal several warning Lights are peculiar to various car brands and model.

Sensors and Applications
A sensor is a device that receives signals (as heat, pressure, light, motion, voltage etc.) from various components and system in the vehicle and sends this message to the ECU for interpretation and response by sending messages to the actuators to control these components or system.

The study of sensors and actuators and their diagnostics is not a part of this course, but this topics are available on other of our books.

Application of sensors in Braking and Stability System of Vehicles.
ABS stands for Anti-lock braking System. It’s an anti-skid system that prevents skidding of wheels when emergency brakes are applied.

Some vehicles use abs sensors to detect vehicle speed. ABS sensors are usually located on each wheel. Speed sensors are usually located on the gearbox. They read output shaft rotation and send information to ECU for speedo reading. On some vehicle you can get both Abs and speed sensor. Speed sensor will be for the speed and abs for anti-skid.

Also ESP (Electronic stability program) present in vehicle such as Mercedes Benz aids emergency braking and stability just like ABS, it helps to increase braking impact on emergency braking when the yaw sensor senses an obstacle or pedestrian ahead of the vehicle, it also aids emergency parking, both ABS and ESP are present in all modern vehicles.

In Toyota there is also BA (brake assist) it works alongside the ABS and it comes up when there is need for Quick braking especially if an accident is about to occur, then any little pressure on the brake it will automatically reduce the speed of the vehicle to the barest minimum.