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Stellantis is recalling 2017 and 2018 model year Ram 2500, 3500, 4500 and 5500 pickup trucks. A defective brake hydraulic control unit can lead to failure of the anti-lock braking, stability ...
"ABS works with your regular braking system by automatically pumping them. In vehicles not equipped with ABS, the driver has to manually pump the brakes to prevent wheel lockup. In vehicles equipped with ABS, your foot should remain firmly planted on the brake pedal, while ABS pumps the brakes for you so you can concentrate on steering to safety."
The fault could be lack of hydraulic fluid, low brake fluid in the reservoir, a broken hydraulic line or a bad master brake cylinder. The sensor is used to detect pressure differentials in the hydraulic system. If the car alerts a fault in the hydraulic system and the system checks out, the sensor itself may have failed. [2]
The recall concerns brake fluid leakage from the master cylinder (U.S. market and non-U.S. marketed Toyota Crown and Lexus GS350) and an electrical problem with the fuel pump, which would cause engine stalling (all markets except the U.S.).
Other problems may be implicated in the case of older vehicles equipped with carburetors. Weak, disconnected, or mis-connected throttle return springs, worn shot-pump barrels, chafed cable housings, and cables which jump their tracks in the throttle-body crank can all cause similar acceleration problems.
The Sensotronic Brake Control (SBC) system operates using a hydraulic high-pressure reservoir to supply brake fluid. A piston pump, driven by an electric motor, generates controlled brake fluid pressure ranging between 140 bars (2,000 psi) and 160 bars (2,300 psi) in the gas diaphragm reservoir.
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