ABS diagnosis typically starts with accessing the associated DTCs and then applying the appropriate flowchart. There will be times when this type of approach will not be possible, or the occasions when it doesn't yield positive results. When this is the case, it is always helpful to have an understanding of how the systems and components work so you can develop generic testing methods. Before discussing these generic methods it's important to understand that you should generally follow the DTC-to-flowchart method mentioned. This is especially true if you are unfamiliar with the system being diagnosed. This method will typically lead to finding the cause of the problem, while at the same time keep you out of trouble. The generic methods we are going to discuss can be used in conjunction with the published methods or as stand-alone techniques.
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