Patent ID: 6237401
Filing Date: 2001-05-29
Classification: B60T

Abstract:
An apparatus for testing an electronically controlled braking system, the apparatus including:a pressure source of air;a braking sub-system, with a modulator, for at least one wheel, wherein the modulator is controlled by an electronic control unit to control a braking pressure of the at least one wheel, the modulator further including:a hold solenoid valve and an exhaust solenoid valve wherein the hold solenoid valve regulates a first air flow from the pressure source of air passing through the modulator and wherein the exhaust solenoid valve regulates a second air flow passing from the modulator to an ambient atmospheric area of the apparatus; and,wherein upon activation of a testing signal for the braking system, the electronic control unit energizes a first one of the hold and exhaust solenoid valves a first number of times greater than or equal to one and the electronic control unit energizes a second one of the hold and solenoid valves a second number of times greater than or equal to one, said second number being different than said first number such that a sound is generated when the solenoids in the modulator are correctly wired that is different than a sound that is generated when the solenoids are miswired.