ABS MK II - VWClub.BG

- Dissipate accumulator pressure.* ABS contact in pressure warning switch opens at 100...110 bar.Brake warning lamp lights.- Check lead from controller plug term. 9 to ABS warning lamp unit as percircuit diagram.Check solenoid valves for proper function and mix-up.Perform test consecutively for each individual wheel.Turn appropriate wheel by hand or drive vehicle on roller dynamometer.Only connect up inlet and outlet valve of one wheel to controller plug.- Ignition off.- Install (see picture) ATE pressure test connection, part no. 03.9305-0145.2between pressure accumulator and hydraulic modulator.- Connect up pressure gauge (250 bar).- Bleed brake system and pressure gauge.- Pressure accumulator must have been discharged.- Ignition on.* Pressure-gauge reading switches to initial pressure of pressure accumulatorSet value: 40...90 bar- Check pressure warning switch 9 at controller plug term. 10 and term. S3.* Brake warning lamp goes out and ABS contact in pressure warning switchcloses at 130...150 bar* Cut-out pressure,Set value: 170...190 bar- Dissipate accumulator pressure.* Renewed cut-in pressure,Set value: 130...150 bar* Pressure build-up time between cut-in and cut-out pressure,Set value: < 25 s- Ignition off.- Pull plug off pump motor.Ignition on.- Check ABS warning contact in closing cover of reservoir.* ABS warning contact opens if float makes contact with lower stop.Note: Switch-on duration of solenoid valves max. 10 s.Check pressure reduction, front left wheel:- Connect up button of KDAW 9975 to controller plug term. 2 to term. 35 andjumper term. 35 with 16.- Ignition on.- Press brake pedal.* Wheel blocks.- Press button.* Wheel can be turned.- Ignition off.- Disconnect button.Note: Switch-on duration of solenoid valves max. 10 s.Check pressure holding, front left wheel:- Connect up button of KDAW 9975 to controller plug term. 2 to 35.- Ignition on.- Press button.- Press brake pedal.* Wheel can be turned.- Release button.* Wheel blocks.- Ignition off.- Disconnect button.Note: Switch-on duration of solenoid valves max. 10 s.Check pressure reduction, front right wheel:- Connect up button of KDAW 9975 to controller plug term. 2 to term. 15 andjumper term. 15 with 34.