chapter 19 Antilock Brake Systems Automotive Brake Systems

chapter 19 Antilock Brake Systems Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Objectives • Identify and describe Bendix antilock braking systems. • Explain the operation and components of Bosch antilock braking systems. • Describe the operation of Delphi antilock braking systems. • Identify and describe Kelsey-Hayes antilock braking systems. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Objectives • Describe the operation and components of Teves antilock braking systems. • Identify and describe Toyota rear-wheel and four-wheel antilock braking systems. This chapter will help you prepare for Brakes (A 5) ASE certification test content area “F” (Antilock Brake System Diagnosis and Repair). Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix 9 ABS • The Bendix 9 ABS, which uses nine solenoids, was used in the late 1980 s and early 1990 s in Jeeps. • The Bendix 9 ABS is an integral ABS system that combines the master brake cylinder with the hydraulic control modulator and two accumulators. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 1 Bendix 9 ABS contains nine solenoids and was used on older model Jeeps. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix 9 ABS • System Description • Pressure Switches and Valves Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Dual Accumulators • Bendix 9 uses two accumulators: – A high-pressure accumulator, located on the master cylinder booster assembly, • Is nitrogen precharged to 1, 000 PSI (6, 900 k. Pa) and capable of storing fluid at 1, 700 to 2, 000 PSI (12, 000 to 14, 000 k. Pa). Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Dual Accumulators – A low-pressure accumulator, precharged at 350 PSI (2, 400 k. Pa), but also capable of storing fluid at 1, 700 to 2, 000 PSI, serves primarily as a fluid reservoir. • System Operation Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 2 Bendix 10 systems use four isolation valves, three decay valves, and three build valves. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix 10 ABS • System Description • Dual Accumulators • Power Switches and Transducers Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 3 Bendix 10 hydraulic control unit. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix 6 ABS • The Bendix 6 system uses six solenoids and is used on many early 1990 s Chrysler vehicles. • The Bendix 6 system is a nonintegral ABS system with a conventional master brake cylinder and power booster. • The hydraulic modulator, pump/motor, and accumulator assembly is located on the frame rail. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 4 Bendix 6 ABS is a nonintegral system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix 6 ABS • • System Description Dual Accumulators Pressure Switch Pump Motor and Control Module Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 5 Bendix 6 schematic showing the normal braking mode (pressure increase stage). Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 6 Bendix 6 modulator with dual accumulators. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix LC 4 ABS • Bendix calls this Bendix III, but Chrysler refers to it as LC 4 (for “Low Cost” system). – It is a lighter, more compact version of the Bendix 6 nonintegral ABS system it supersedes. • It is a nonintegral ABS system with a conventional master cylinder and vacuum booster, and is functionally similar to the Bendix 6 system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix LC 4 ABS • • System Description System Operation Dual Accumulators Pump Motor and Control Module Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 7 Bendix LC 4 system schematic. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 8 Bendix LC 4 modulator and pump assembly. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix ABX-4 • It is a four-wheel, four-channel ABS system with a more compact design than earlier Bendix systems. • On models with ABS, the master cylinder has only two outlets (one for the primary brake circuit and one for the secondary brake circuit). Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix ABX-4 • Both lines are routed to the hydraulic modulator assembly, which Chrysler refers to as the hydraulic control unit (HCU). Inside the master cylinder are more differences. • Those without ABS use a standard compensating port design with two screw-in proportioning valves. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix ABX-4 • System Description • No Accumulators Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 9 Bendix ABX-4 hydraulic control unit. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 10 The wiring schematic for the Bendix ABX-4 hydraulic control unit. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 11 Bendix ABX-4 wiring harness and component locations. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix Mecatronic II • The Ford Contour and Mercury Mystique use the Bendix Mecatronic II ABS system. • It is a four-wheel, four-channel, nonintegral ABS system with four-wheel speed sensors and a conventional master cylinder and power booster. • The Mecatronic II ABS system also provides traction control. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bendix Mecatronic II • System Description • Dual Microprocessors • Traction Control Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 12 Bendix Mecatronic modulator controls ABS and drive wheel traction during acceleration. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 13 Bendix Mecatronic system with traction control showing component locations. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 14 Bendix Mecatronic throttle actuator pushes back the throttle linkage to help reduce wheel spin by reducing engine torque. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bosch 2 ABS • Bosch 2 ABS has been used on a wide variety of domestic and import brand vehicles – Including Audi, BMW, Chevrolet Corvette, Infiniti, Lexus, Mercedes, Porsche, Mazda, Mitsubishi, Nissan, Rolls-Royce, Subaru, and Volvo. • Nonintegral ABS system with a conventional master brake cylinder and vacuum power booster Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bosch 2 ABS • System Description • System Operation Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 15 Bosch 2 ABS system showing the location of the components. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 16 Bosch 2 system hydraulic modulator. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bosch 2 E ABS • Bosch 2 E is a variant of Bosch 2 and is also a nonintegral, four-wheel, three-channel ABS system with a conventional master cylinder and brake booster. – It is used on many Chrysler and Japanese import brands. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bosch 2 E ABS • Each wheel has its own adjustable wheel speed sensor. • The hydraulic modulator contains three -way ABS solenoids: one for each front brake, and a common solenoid for both rear brakes. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 17 Bosch 2 U ABS system components. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 18 Bosch ABS/ASR system in normal braking mode. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 19 Bosch ABS/ASR system in the pressure hold mode. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 20 Bosch ABS/ASR system in the pressure decrease mode. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bosch 5 Series • The Bosch 5. 3 is used on 1998 and later Camaro, Firebird, Pontiac Grand Prix, Oldsmobile Intrigue, and Cadillac Catera. • Another variant, the Delphi/Bosch hybrid, is found on 1996 and later Pontiac Bonneville, Buick Park Avenue, Buick Le. Sabre, Oldsmobile 98, and Oldsmobile 88. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bosch 5 Series • The Bosch 5 series systems are nonintegral, four-wheel ABS with traction control. • However, they are four-channel, rather than three-channel, systems with a compact “unitized” design. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 21 Bosch 5 ABS modulator. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Bosch 5 Series • System Operation • Traction Control Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Delphi ABS-VI • The Delphi (Delco Moraine) ABS-VI antilock braking system has been used on many General Motors vehicles since the early 1990 s. • It is a nonintegral ABS system with a conventional master brake cylinder and power booster. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Delphi ABS-VI • The brake systems on these applications are split diagonally, – So the primary (rear) master cylinder piston operates the right front and left rear brakes, and the secondary (front) piston operates the left front and right rear brakes. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Delphi ABS-VI • • System Description Hydraulic Modulator and Motor Pack System Operation Traction Control Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 22 Delphi ABS-VI components. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 23 Delphi ABS-VI modulator, motor pack, and master cylinder. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 24 Delphi ABS-VI hydraulic modulator. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 25 Delphi ABS-VI motor pack assembly. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 26 Delphi ABS-VI expansion spring back (ESB) construction and operation. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 27 Delphi ABS-VI system in pressure decrease mode for one front brake circuit. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 28 Delphi ABS-VI system in the pressure increase mode for one front brake circuit. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 29 Delphi ABS-VI system in pressure decrease for a rear brake. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Delphi DBC-7 ABS System • Delphi Brake Control DBC-7 ABS system is the successor to the Delco ABS-VI system and is used on many General Motors vehicles. • System Components • System Operation Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 30 Delphi DBC-7 ABS system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Kelsey-Hayes EBC 2 RABS and RWAL • Kelsey-Hayes EBC 2 rear-wheel antilock braking systems have been in use since the late 1980 s on Ford trucks and vans. • Ford calls their version of EBC 2 the Rear Wheel Antilock Braking System (RABS). • On General Motors truck and van applications, the EBC 2 system is called Rear Wheel Antilock (RWAL). Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Kelsey-Hayes EBC 2 RABS and RWAL • Rear-wheel-only antilock braking cannot provide the same benefits as four-wheel ABS braking. – It is a major improvement over standard brakes on trucks and vans where vehicle loading has a major influence on brake balance and traction. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 31 Kelsey-Hayes RWAL ABS system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 32 Kelsey-Hayes RWAL system modulator in the normal brake mode (pressure increase mode). Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 33 Kelsey-Hayes system modulator in the pressure hold mode. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 34 Kelsey-Hayes system modulator in the pressure decrease mode (pressure dump mode). Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Kelsey-Hayes EBC 4 4 WAL • The Kelsey-Hayes EBC 4 four-wheel antilock braking system is used on General Motors trucks and is called 4 WAL. • The 4 WAL system is a nonintegral, fourwheel, three-channel ABS system with a conventional master cylinder and brake booster. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Kelsey-Hayes EBC 4 4 WAL • Each front brake circuit is controlled independently, but both rear brakes are controlled as a pair. • The system remains active in four-wheel drive, unlike some earlier RWAL applications where ABS was deactivated in four-wheel drive. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Kelsey-Hayes EBC 4 4 WAL • System Description • Electrohydraulic Control Unit (EHCU) • System Operation Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 35 Kelsey-Hayes 4 WAL ABS system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 36 Kelsey-Hayes 4 WAL electrohydraulic control unit (EHCU). Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 37 Kelsey-Hayes 4 WAL system hydraulic schematic in the normal (pressure increase) mode. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Kelsey-Hayes EBC 5 H • Later Kelsey-Hayes four-wheel ABS systems include the EBC 5 and EBC 10. • The EBC 5 H system is on Dodge trucks and vans. • It is a nonintegral, four-wheel, hybrid, threechannel system that uses a separate hydraulic modulator for the front wheels and a RWAL modulator for the rear wheels. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 38 Kelsey-Hayes EBC 5 H four-wheel ABS system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 39 Component location for the Kelsey. Hayes EBC 5 H four-wheel ABS system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Kelsey-Hayes EBC 5 U • Ford Econoline vans use a different version of the EBC 5 system named EBC 5 U for “unitized. ” • This system has a single modulator assembly for all four wheels instead of the separate front and rear ABS modulators used by Dodge. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Kelsey-Hayes EBC 310 • EBC 310 is a nonintegral, four-wheel, threechannel unitized system with the control module mounted on the modulator. • The modulator contains six ABS valves: three isolation valves and three dump valves, plus a pump and accumulator. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Kelsey-Hayes EBC 410 • Another Kelsey-Hayes ABS system, called EBC 410, is used on Ford Windstar minivans. – It is similar to the EBC 310 system except that the EHCU has eight ABS solenoids, and an isolation and dump valve for each brake circuit. • The two extra solenoids allow the system to control each rear brake circuit separately, making it a four-channel system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 40 Hydraulic schematic of the Kelsey-Hayes EBC 410 four-channel ABS system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 41 Sumitomo ABS system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Sumitomo ABS • System Description • ABS Operation Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 42 Sumitomo modulator. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Teves Mark IV • The Teves Mark IV is a nonintegral, fourwheel ABS system. – It uses a standard master brake cylinder and booster with a separate hydraulic modulator and pump assembly. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Teves Mark IV • It is used on many General Motors, Ford, and Chrysler vehicles. • System Description • Control Module • ABS Operation • Traction Control Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 43 Teves Mark IV nonintegral ABS hydraulic circuit. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 44 Teves Mark IV hydraulic control unit. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Teves Mark 20 and Mark IV G • A nonintegral, four-wheel ABS system that is used on many Chrysler vehicles • The hydraulic modulator and pump assembly, which Chrysler calls an integrated control unit (ICU), is separate from the master cylinder. • A dual compensating port master cylinder is used on vehicles without traction control. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Teves Mark 20 and Mark IV G • • System Description Control Module ABS Operation Traction Control Operation Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 45 Teves Mark 20 ABS system on a typical rear-wheel-drive application. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 46 Teves Mark 20 ABS system on a typical front-wheel-drive application. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 47 Teves Mark 20 ABS systems with traction control use a master cylinder that has center valves to allow the brake fluid to flow from the master cylinder reservoir. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 48 The integrated control unit (ICU) is used on most Mark 20 ABS applications. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 49 The deceleration sensor in Teves Mark 20 ABS systems used on Jeep applications uses three mercury switches that open in response to forward and reverse deceleration forces. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 50 Component location of the Toyota rear-wheel ABS system. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 51 Toyota rear-wheel ABS hydraulic circuit. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 52 Toyota four-wheel ABS system uses a hold solenoid and decay (pressure reduction) solenoid in each hydraulic circuit. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems FIGURE 19– 53 The normally open hold solenoid closes at the start of an ABS stop. The check valve allows fluid to flow to the master cylinder when the brake pedal is released. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Summary • Chrysler used the nonintegral Bendix 6 ABS on many vehicles. • Chrysler used the Bendix LC 4 ABS nonintegral ABS system as well as the Bendix ABX-4 on many vehicles. • The Bendix Mecatronic II ABS system was used on Ford Contour and Mercury Mystique. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Summary • The Bosch 2 E nonintegral ABS system was used on many Chrysler and Japanese import brand vehicles. • The Bosch 2 U nonintegral ABS system was used on many General Motors and Ford Motor Company vehicles. • The Bosch 5 nonintegral ABS was used on many General Motors vehicles. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Summary • The Delphi ABS-VI nonintegral system has been used on many General Motors vehicles since the early 1990 s. • Delphi DBC-7 replaced the Delphi ABS-VI and is a nonintegral, four-channel ABS system. • Kelsey-Hayes RABS, RWAL, and 4 WAL have been used on most domestic pickup trucks since the late 1980 s. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ

Chapter 19 Antilock Brake Systems Summary • Sumitomo ABS is a nonintegral, four-wheel, three-channel system used on many vehicles. • Teves Mark IV and Mark 20 are nonintegral ABS systems used on many domestic brand vehicles. • Toyota rear-wheel and four-wheel ABS systems are used on many Toyota vehicles. Automotive Brake Systems James D. Halderman © 2014 Pearson Higher Education, Inc. Pearson Prentice Hall - Upper Saddle River, NJ