A method for determining a location of and isolating a leak in a braking system for a motor vehicle, the method comprising: selectively using a direct apply subsystem, which is operably associated with a brake pedal of the vehicle, and an isolated apply subsystem, to control an application of fluid to a first circuit and a second circuit; and operating in a leak location detection mode to detect the location of the leak by simultaneously controlling the direct apply subsystem and the isolated apply subsystem to: enable fluid communication between the isolated apply subsystem and the first circuit of the braking system; block fluid communication of the direct apply subsystem with the first circuit; enable fluid communication of the direct apply subsystem with the second circuit of the braking system; and block fluid communication of the isolated apply subsystem with the second circuit; the leak location detection mode being characterised by using an input signal associated with a sensed travel of an isolated apply component of the isolated apply subsystem and a sensed fluid pressure developed by the isolated apply subsystem to determine if the leak is present in the first circuit, and simultaneously using a sensed travel of a direct apply component (12c, 12f, 12g, 14) associated with the direct apply subsystem and a sensed fluid pressure developed by the direct apply subsystem to determine if the leak is present in the second circuit. selectively using a direct apply subsystem, which is operably associated with a brake pedal of the vehicle, and an isolated apply subsystem, to control an application of fluid to a first circuit and a second circuit; and operating in a leak location detection mode to detect the location of the leak by simultaneously controlling the direct apply subsystem and the isolated apply subsystem to: enable fluid communication between the isolated apply subsystem and the first circuit of the braking system; block fluid communication of the direct apply subsystem with the first circuit; enable fluid communication of the direct apply subsystem with the second circuit of the braking system; and block fluid communication of the isolated apply subsystem with the second circuit; the leak location detection mode being characterised by using an input signal associated with a sensed travel of an isolated apply component of the isolated apply subsystem and a sensed fluid pressure developed by the isolated apply subsystem to determine if the leak is present in the first circuit, and simultaneously using a sensed travel of a direct apply component (12c, 12f, 12g, 14) associated with the direct apply subsystem and a sensed fluid pressure developed by the direct apply subsystem to determine if the leak is present in the second circuit. enable fluid communication between the isolated apply subsystem and the first circuit of the braking system; block fluid communication of the direct apply subsystem with the first circuit; enable fluid communication of the direct apply subsystem with the second circuit of the braking system; and block fluid communication of the isolated apply subsystem with the second circuit; the leak location detection mode being characterised by using an input signal associated with a sensed travel of an isolated apply component of the isolated apply subsystem and a sensed fluid pressure developed by the isolated apply subsystem to determine if the leak is present in the first circuit, and simultaneously using a sensed travel of a direct apply component (12c, 12f, 12g, 14) associated with the direct apply subsystem and a sensed fluid pressure developed by the direct apply subsystem to determine if the leak is present in the second circuit.