REAR ANTI-LOCK BRAKES. COMPONENTS n RABS Module n RABS Valve n RABS Speed Sensor n RABS ABS Warning Light n RABS Diagnostic Connector n RABS Diode/Resistor.

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Presentation transcript:

REAR ANTI-LOCK BRAKES

COMPONENTS n RABS Module n RABS Valve n RABS Speed Sensor n RABS ABS Warning Light n RABS Diagnostic Connector n RABS Diode/Resistor Element n RABS Sensor Test Connector

RABS MODULE n Usually located inside vehicle. n Senses wheel speed other inputs n Controls RABS valve and warning light n Performs self- diagnostics n Single Channel

WHEEL SPEED SENSOR n Located in Rear Axle n Provides signal in form of AC Voltage n Direct input to Module n Excitor Ring and Sensor Pole Piece LAB PAGE 159 CLASS PAGE 163

WHEEL SENSOR n Voltage Generator n Air Gap (.050) n Magnetic Field around the coil n Exciter Ring interrupts the magnetic field n Sensor Test Conn.

RABS VALVE n Two Solenoid Unit to open or close hydraulic circuits n Inlet/Isolation Valve n Outlet/Dump Valve n Built in accumulator Page 191C

OPEN AND CLOSED ABS SYSTEMS Description Page 181C

RABS DIAGNOSTIC CONNECTOR n Ford RAB systems have no diagnostic memorys for codes. n Usually single terminal connectors n Flashes Amber light n Ground terminal to activate self test FLASHOUT CHART - L232

DIODE/RESISTOR n Located in main harness under dash n Isolates RAB module from parking brake switch

THE END

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