Replacing Control Unit For Parking Brake

NOTIFICATION

Voltage drop

Risk of irreparable damage to control unit
Risk of damage to control unit
Fault entries in the control unit
Coding in the control unit is aborted
Malfunctions in control unit, even during programming
- Prior to disconnecting the control unit, switch off ignition and remove ignition key.
- Ensure that the power supply is not interrupted during programming.
- Connect a battery charger with a current rating of at least 90 A to the vehicle battery

Information

The PIWIS Tester instructions take precedence since the description may be different with later Tester releases.

The procedure described here has been structured in general terms. Different text or additional information may appear on the PIWIS Tester .

Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on ignition. Press F12 to continue.
Select the vehicle type and start the PIDT.
Select the required control unit, i.e. Parking brake in the overview .
Maintenance/repairs must then be selected.
Control unit replacement must now be selected. Then press F12.
Read data must now be selected. Then press F12.
Press F8 to start reading out data.
Check the chassis number and press F12.
Switch off ignition.
Replace control unit.
> WM, 466219 REMOVING AND INSTALLING CONTROL UNIT FOR PARKING BRAKE
Switch on ignition. Select the Write data menu (procedure described above), press F12 and then press F8 to start installing the data that was read out.
The System Tester displays the message Data has been written . Press F12 to continue.
Read out the fault memory and erase it if necessary.
Select Automatic coding in the Coding/adaptation menu and press F12.
Read out the fault memory and erase it if necessary.
Select Calibration in the Maintenance/repairs menu and press F12.
Read the information displayed on the Tester, follow the instructions on the Tester and carry out the procedure.
Carry out a function test on the parking brake.