Removing and installing booster pump - four wheel drive vehicles: Removal

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

Fig 1: Removing Booster Pump With Holder - Four Wheel Drive Vehicles

Courtesy of PORSCHE OF NORTH AMERICA, INC.

1. Switch off ignition.
2. Remove cover -A-  from the hydraulic unit.
   Fig 2: Removing Cover From Hydraulic Unit

   Courtesy of PORSCHE OF NORTH AMERICA, INC.
3. For the removal of the booster pump, carry out the following removal steps:
   Fig 3: Removing Of Booster Pump - Four Wheel Drive Vehicles

   Courtesy of PORSCHE OF NORTH AMERICA, INC.

• Remove suction line -2-  for booster pump. Refer to Fig 3 . Undo pressure pipe on the booster pump -3-  . Close the lines and the pump connections with suitable plugs.
• Release plug -4- -Arrows-  and disconnect. Refer to Fig 3 . Remove connector housing rearwards from out of the holder -Directional arrow-  .
• Remove connector on pressure sensor (only present with PSM 5.3).
• Undo the three plastic fastening nuts -5-  and remove the booster pump -1-  with the holder -1a-  . Refer to Fig 3 .