Today, a netizen asked me, saying that my car was on-line annual inspection, and the brake performance test was not qualified. After coming out, an acquaintance scalper told him that he could pull out the ABS fuse of the car and pass. He did what he believed, and it was passed. He asked me why? In addition, the insurance of the car ABS is unplugged, does it have an impact on the braking performance of the car?
Unplugging the fuse of the car's ABS system certainly has an impact on the car's braking performance! One of the biggest effects is that you can't turn around when braking urgently. The full name of the automotive ABS system is "automotive brake anti-lock braking system", its main role is to avoid the car in the emergency braking of the steering wheel lock, so that the car to maintain the steering ability. If the fuse of the car ABS system is unplugged and the ABS system no longer works, then in the emergency braking, the wheels are completely locked and the car loses the ability to steer. If there are obstacles or people in front of you, you can't avoid them.
Beyond that, what are the implications?
1. The braking distance will be shortened
Yes, you read that right, after unplugging the fuse of the car's ABS system, the braking distance of the car will indeed be shortened. The automotive ABS system was designed to allow the car to maintain steering capability during emergency braking, rather than shortening the braking distance. In actual driving, especially at medium and low speeds, braking on snow, snow, wet and slippery roads, if the ABS system works, the braking distance will increase significantly. There are many cars in the annual inspection, the brake performance test is not qualified, then the experienced old driver will pull out the fuse of the car ABS system, and then go online to test, it is qualified, the reason is here.
2. The various brake auxiliary functions of the car will fail
There are various brake assist devices in today's cars, such as electronic braking force distribution (EBD), automatic cornering control (CBC), braking force assist system (EBA, BAS, BA), traction control system (ASR, TCS, TRC), hill assist system (HAC), automatic parking function (AUTOHOLD), steep slope slow descent control (HDC), brake priority system (BOS), automatic braking function, and so on. These brake assist functions are extended on top of the ABS system, which shares the automotive brake hardware with the ABS system. If the car ABS system fails, the car only has the basic braking performance, other auxiliary functions are invalidated, the driver's control of the body will be sharply weakened, and the car is in danger of getting out of control in an emergency.
3. The speedometer and odometer of the car will be invalidated
In today's cars, the calculation of speed and mileage statistics are calculated according to the wheel speed sensor signals on the wheels. When the car is driving, the wheel speed sensor transmits the speed signal of the wheel to the driving computer through the ABS system, and the driving computer calculates the current speed and mileage according to the internally stored program, and displays it on the dashboard. If the fuse of the car ABS system is unplugged, the signal of the wheel speed sensor cannot be transmitted to the driving computer, and the speed and mileage cannot be displayed. There are many 4s shops that will pull out the ABS fuse when moving the car for a long distance, so that the odometer of the car does not increase the mileage, so as to meet the psychological needs of the customer's "zero kilometer car".
Therefore, unplugging the car ABS system insurance has a relatively large impact on the car's braking system and body control capabilities. If we are for the sake of the smooth passage of the annual inspection, we can temporarily remove the fuse, increase the braking force of the car, shorten the braking distance, and let the annual inspection pass smoothly. After the annual inspection, the fuse should be inserted immediately to restore the control of the car to the ABS system to normal. In addition, after unplugging the ABS system fuse, the fault light will be displayed on the dashboard, and the re-insertion of the fuse will not be eliminated, in this case we will have to go to the repair shop to eliminate this fault light, otherwise some brake assist functions are also limited.