81271206202 Auto ABS Sensor

1. Reasons why the ABS fault light comes on:
Each component of the ABS anti-lock braking system is relatively simple and clear, so it is relatively simple to analyze the cause of the ABS fault light.
1. Problem with ABS wheel Speed Sensor.
The wheel speed sensor is arranged on the wheel and is easily contaminated by mud and mud. The sensor is covered with a large amount of mud, which will affect the transmission of the vehicle speed signal. The ABS computer cannot judge the vehicle speed signal and will alarm. At this time, clean the dirt on the sensor. Just adjust the gap between the sensor and the signal ring gear. If the wheel speed sensor is damaged, it can only be replaced.
2. Line connection failure
This is also a relatively common fault. Although every car has an ABS system, the assembly quality and materials are actually different due to different processes. There are many faults caused by the loose wiring of the wheel speed sensor, so you can focus on checking.
3. Problems with ABS control unit (ECU) programming
It is likely that the data in the control unit does not match or is incorrect. Readjusting the data requires the use of a special testing computer.
4. The ABS control unit (ECU) circuit board is faulty and the computer needs to be replaced.
However, the probability of this kind of failure is very small. In some cars, even the circuit board of the ABS control unit can still be repaired simply, such as the welding point falling off, etc.