Brake Fluid Pump: Service and Repair

Removing And Installing Booster Pump For PSM

Removal







NOTE: The booster pump -arrow- is located on the opposite side to the hydraulic unit.

1. Switch off ignition.
2. Remove spare wheel and cover from the booster pump. Remove luggage compartment lining in the area around the booster pump.







3. For the removal of the booster pump, carry out the following removal steps:
- Undo the suction line for the booster pump and the pressure pipes on the booster pump -arrows-. Close the lines and the pump connections with suitable plugs.
- Disengage the connector housing -arrow- from the holder, unlock and separate the connector.
- Remove booster pump.

Installation
1. Install in reverse order.
2. Bleed 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.