Brake Fluid Pump: Service and Repair

Remove and Install Booster Pump For PSM

Removal





NOTE: The booster pump -1- is removed with the holder -1a-.

1. Switch off ignition.





2. Remove cover -A- from the hydraulic unit.





3. For the removal of the booster pump, carry out the following removal steps:
- Remove suction line -2- for booster pump. Undo pressure pipe on the booster pump -3-. Close the lines and the pump connections with suitable plugs.
- Release plug -4- -arrows- and disconnect. Remove connector housing rearwards from out of the bracket -moving arrow-.
- Undo the three plastic fastening nuts -5- and remove the booster pump -1- with the holder -1a-.


Installation

1. Install in reverse order.
2. Bleed the brakes.

NOTE:
- First bleed brakes as usual.
- Do not carry out booster pump activation with the Porsche System Tester 2 until after this has been done (after conventional bleeding) as otherwise damage to the booster pump can occur.
- To bleed at front on right with running booster pump the bleeding device should remain connected (switched on). Bleeding pressure approximately 2.0 bar.

3. Carry out the following tests:
- Read out and erase the fault memory of the PSM control module with the Porsche System Tester 2. Carry out a static test.
- Then start the engine. The PSM-related lights in the instrument cluster must go out when the engine is running
- Read out the PSM fault memory again. There must not be any stored faults.