HEXA

ELECTRONIC STABILITY PROGRAM (ESP) 7 19.3 COMPONENTS NOTE For all components except ESP ECU, Steering angle sensor, Yaw rate sensor and ESP warning lamp refer ABS section. A. ESP ECU AND HYDRAULIC UNIT The ESP ECU and hydraulic control unit consist of a hydraulic modulator with integrated pressure sensor and electronic control unit. In addition to the individual wheel valves present for the ABS, the ESP hydraulic modulator has a pair of internal switching valves on the primary and secondary brake circuits from the master cylinder. These are used when brake pressure has to be increased at individual wheels. The HCU of ABS vehicles (ABS only) and ESP vehicles cannot be interchanged. ESP hydraulic unit have additional 4 valves for Brake pressure increase.