Control Module: Service and Repair

Removing and installing transmission control unit (PDK)








Preliminary work

Preliminary work for transmission control unit (PDK)

Remove left front seat.

Remove rear side trim panel at the left.

Remove left door entry guard.

1. If the control unit has to be replaced, the values must be read out of the PDK control unit using the PIWIS Tester 9718 before removing the control unit.

Removing transmission control unit (PDK)





Installation position

Warning
Sudden voltage interruption of the power supply to the control module.
^ Destruction of the control module.

-> During programming, it is essential to guarantee the power supply for the Porsche System tester. It is essential to connect a battery charger with a current rating of at least 40 A to the vehicle battery.

-> Prior to disconnecting the control module, switch off the ignition and remove the ignition key.

1. Unlock and disconnect electric plug connections on the main wire harness -a-.





Unlocking electric plug connections

2. Unlock retaining bar -a- and open it up.





Unlocking and opening retaining bar

3. Remove transmission control unit from the bracket.





Release and pull off electric connectors on the control unit.

4. Release, open and remove electric connectors on the control unit -arrow-.

Installing transmission control unit (PDK)

1. Connect and lock electric connectors on the transmission control unit -arrow-.





Plugging in and locking connectors on the control unit

2. Position transmission control unit in the bracket.





Closing and engaging retaining flap

3. Close the retaining flap and engage it in the retaining frame.
4. Connect electric plug connections on the main wire harness according to color and lock them -a-.





Plugging in and locking electric plug connections

Subsequent work

Subsequent work for transmission control unit (PDK)

Install left door entry guard.

Install left front seat.

Install rear side trim panel at the left.

1. If the PDK transmission control unit was replaced, the PDK transmission control unit must be programmed and calibrated.

Programming transmission control unit (PDK)

Information
This description applies when a new PDK control unit is used.

Caution
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 the ignition and remove the ignition key.

-> Ensure that the power supply is not interrupted during programming.

-> Connect a battery charger with a current rating of at least -> Nominal value: 40 A to the vehicle battery.

Warning
The vehicle can move automatically while you are calibrating the transmission control unit (PDK).
^ The raised vehicle can fall from the lifting platform, for example.
^ Danger of crushing.
^ Risk of damage to or from objects.

-> During calibration, the brake pedal must be blocked using a commercially available brake pedal lock.

-> The handbrake must be engaged.

-> The vehicle must not be raised and must be standing on its wheels.

Information
The PIWIS Tester 9718 instructions take precedence since the description may be different. This may be due to more recent software versions.

The procedure described here has been structured in general terms; different text or additions may appear in the PIWIS Tester 9718.

1. Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on the ignition and press >> to continue.
2. Select vehicle type.
3. Select PDK and press
4. Select Read out values in the Control unit replacement menu and press >>.
5. The Tester confirms that the Values were read out. Press >>.
6. Remove the "old" PDK control unit and install the "new" PDK control unit.
7. Select PDK, Control unit replacement and Write values. Then press >>.
8. Select Program control unit and press H. Then read the warning notes on the Tester.
9. Select vehicle type and press
10. Start programming by pressing F8. Data is then written.
11. The Tester displays the confirmation Programming was completed successfully.
12. Read out the PDK fault memory and check whether faults P1870, P1871 and P174B are present.
12.1. If faults are present, correct the faults according to Guided Fault Finding instructions.
12.2. If there are no faults present, proceed with the calibration process.
13. Select the Calibration menu and press >>.
14. Confirm the warning notes on the Tester by pressing F7.
15. Start the calibration process by pressing F8.
16. Follow the instructions on the Tester.
16.1. Shift travel is calibrated.
16.2. Hydraulics are calibrated.
16.3. Clutches are calibrated.
17. The Tester displays the message Calibration successful. Press >>. Follow the instructions on the Tester.
18. Select the Coding menu, then Country coding and press >>.
19. Country version must now be selected. Press F8 to start coding. Then press >>.
20. Read out and erase all fault memories.
21. Exit the menu and perform a test drive. Read out the fault memory for all control units after the test drive.