ABS 32 ANTI-LOCK BRAKES WORKSHOP TESTING Any malfunction in the ABS is signaled by the warning lamp in the instrument cluster, which can be later on diagnosed at the workshop using a diagnostic tool. Malfunction code retrieval serves as the basis for detecting and evaluating defects and inconsistent performance. Data are analyzed using special diagnostic tool. Following are some of the common errors that occur a. Electrical circuit problem such as intermittent contact b. Component and sensor failure c. Sensor signal that deviates from specified levels d. Unusual response and malfunction in the actuators Some of the common test which needs to be done before drive test. This involves a check for the following: l Correct functioning of all input and output signals of the ECU l Correct functioning of wheel speed sensors l Correct functioning of all valves and hydraulic components
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