What Causes the ABS/DSTC Warning Light to Illuminate?
1 Answers
What factors can cause the ABS warning light to come on? ABS is a very mature technology and generally does not malfunction. The reasons for the ABS warning light to illuminate are often simple issues: 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 identifying the vehicle speed and determining the wheel slip rate, thus failing to issue appropriate commands to adjust braking. In this case, simply cleaning the dirt off the speed sensor and adjusting the gap between the speed sensor and the signal ring can restore normal function. However, some repair shops often recommend replacing the speed sensor, which the owner should not immediately agree to. Of course, damage to the speed sensor is also the most common cause of the ABS warning light illuminating, in which case replacement is necessary. 2. Poor signal quality due to loose connections between system wires or poor contact in the ABS relay can cause system malfunctions. The most common issue is a loose speed sensor wire connector, which will also show up as a poor speed sensor signal in the ABS computer's fault memory. However, this does not necessarily mean the speed sensor is faulty. Experienced technicians usually check these simple components before replacing the sensor.
