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Removing and installing hydraulic unit: Installation

  1. Install in reverse order.
  2. Bleed brakes. See BLEEDING BRAKES - VEHICLES WITH ABS AND ABS/TC , or BLEEDING BRAKES - VEHICLE WITH PSM .
    NOTE: After conventional bleeding, the ABD circuit must then be bled for vehicles with TC. The Porsche System Tester (PST 2) is required for this.
  3. Check electrical and hydraulic lines (brake lines) for incorrect assignment using the Porsche System Tester 2.
    NOTE: The test checks that the brake lines/solenoid valves are assigned to the correct brake calipers (wheels). To do this, carry out a system test on vehicles with ABS or ABS/TC. See ABS/PSM - check with Porsche System Tester 2  .
  4. When replacing the hydraulic unit in vehicles with ABS/TC (4-channel system), code the control module (manual transmission or Tiptronic).
  5. Check brakes and ABS for correct functioning. Perform a short test drive to do this, and carry out at least one ABS control operation while taking into account the traffic situation. Then read out the fault memory.
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