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120 ELECTRIC/ELECTRONIC SYSTEM D AILY Base - May 2004 figure schematically shows the connection of the modulator and its internal components. Pressure increase brake calipers as both the drive solenoid valves "6" and the supply solenoid valve "11" are open. 1. Vacuum servobrake - 2. Electronic control unit - 3. High pressure accumulator - 4. Recovery pumps - 5. Recovery pump drive motor - 6. ABD control solenoid valves (setting 90 bar) - 7. One-way safety valves - 8. ABD intake solenoid valves - 9. ABD one-way valves - 10. Low pressure accumulator - 11. Supply solenoid valves - 12. Discharge solenoid valves - 13. One-way quick pressure reduction valves - 14. Font axle disk brakes - 15. Rear axle disk brakes Figure 119 |