小红旗轿车ABS故障排除7例（7 cases of small flag car ABS troubleshooting）.docVIP

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小红旗轿车ABS故障排除7例（7 cases of small flag car ABS troubleshooting）.doc

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小红旗轿车ABS故障排除7例（7 cases of small flag car ABS troubleshooting） 7 cases of small flag car ABS troubleshooting In 1 cases A red flag CA 7200E3 sedan, ABS lights. Check with the car king to show the right rear wheel speed sensor failure. The first detection of the right rear wheel speed sensor resistance, the resistance value is normal, and no bonding phenomenon, the sensor is normal; then when the gap detection sensor, sensor When the device is removed, it is found that the head of the sensor has been seriously worn. This shows that the gap between the sensors is too small, and the top of the sensor is grinding with the gear ring, and the noise is abnormal (the car owner also reflects the abnormal noise of the right rear wheel). In this case, replaced by a new sensor, and use a screwdriver to the sensor bracket as shown on the right, the plate outward to pry the gap adjustment to the standard range (if not adjusted will wear test (ABS), all the normal bright lights and no abnormal sound). The sensor support is prone to flex deformation, resulting in a change in the sensor clearance. When the gap is too long, the sensor output signal is not allowed or abnormal sound, and the ABS light is on. Figure 1 1- rear axle hub, 2- outer bearing, 3- gear ring 4-, rear brake drum 5- fastening bolt 6- sensor bracket 7- fastening nut 8- spring washer 9- rear wheel speed grade In 2 cases A red flag CA7200E3 car, ABS light. First, check the left front wheel speed sensor with instrument. Use multimeter to check the resistance of sensor, the resistance is normal, and then measure the resistance value from the ABS ECU end, also normal. It looks like there may be occasional failures. After the fault code is cleared, the test run is carried out. The result is that the ABS light is on, the instrument still shows the left front wheel speed sensor is broken, and the resistance value from the ECU end is still normal. Repeated trial five or six times, each time showed the same fault code, and ea