Differential Pressure Switch

Fig. 2 - Hydraulic Assembly:

9105-14 Fig. 5 - Pressure Switch And Pressure Transducer Wiring:

A non-latching differential pressure switch is used to detect a pressure difference greater than (2,068 kPa) 300 psi. between the primary and secondary master cylinder hydraulic circuits. If detected, the differential pressure switch grounds the output of the primary pressure transducer (circuit B18). This results in a 0.0 volt signal from the primary pressure transducer which is sensed by the (CAB) as a differential pressure fault, when the brake pedal is applied. The (CAB) will then light the BRAKE warning lamp and the ANTI-LOCK warning lamp and disable the anti-lock function. (see Fig.2) for location of the differential pressure switch.