What are the reasons for ABS false intervention during low-speed braking?
2 Answers
The reasons for ABS false intervention during low-speed braking are as follows: Reason 1: The sensing part of the ABS speed sensor is covered by mud, sludge, or other contaminants, affecting the sensor's ability to detect the corresponding speed signal. This prevents the ABS computer from determining the vehicle speed and the wheel slip rate, thus failing to issue appropriate commands to regulate braking. Solution: Clean the dirt from the speed sensor and adjust the gap between the speed sensor and the signal gear ring to restore normal function. Reason 2: Poor signal quality due to loose connections between system lines or poor contact of the ABS relay can cause system failure. The most common issue is a loose speed sensor wire connection, which will also show as a poor speed sensor signal in the ABS computer's fault memory. Solution: Check the line connections and reconnect any loose parts.
Last time my ABS mistakenly intervened during low-speed braking, most likely due to dirty or damaged wheel speed sensors. Accumulated dust caused the system to misjudge the wheel speed, thinking the wheels were about to lock up, thus triggering the ABS incorrectly. Additionally, aging ABS modules or electronic control faults can also cause errors, especially on slippery roads where the sensors are more sensitive. During inspection, it's best to clean the sensor area with a damp cloth and not overlook uneven tire wear which can trigger false activations. Long-term neglect can also increase brake pad wear. From my driving experience, regular sensor maintenance can prevent issues before they arise—safety first.
