Coding The Vehicle Electrical System Control Unit

Information 

• If the control unit for the vehicle electrical system is replaced, it must be programmed using the Porsche System Tester. This will ensure that the control module is taught for the relevant vehicle, country version and equipment. 
• If possible, before the control module is removed and replaced, a read-out of the vehicle data should be obtained using the Porsche System Tester. 
• During coding, 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. 
• Symbol for the Tab key  = [?]
• The Porsche System Tester instructions take precedence and in the event of a discrepancy these are the instructions that must be followed. Deviations may occur with later software versions. 
• The procedure described here has been structured in general terms; different text or additions may appear in the Porsche System Tester. 

1. Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on ignition. Press [>>] to continue.
2. Select vehicle type using the cursor keys.
3. Using the [?] key, move from the vehicle type to the control modules.
4. Select Vehicle electrical system with the cursor keys and press the [>>] key.
5. Select Control unit replacement with the cursor keys and press the [>>] key.
6. Select Read out values (codings) with the cursor keys and press the [>>] key.
7. The message "Reading code" will appear on the screen of the Porsche System Tester. Press the [>>] key.
8. Switch off the ignition and replace the vehicle electrical system control unit. → Removing Vehicle Electrical System Control Unit 
9. After replacement of the vehicle electrical system control unit, the vehicle data is installed under the menu Write in data (see Section 6). Press the [>>] key.
10. System Tester displays Coding write-in complete. Press the [>>] key.
11. Quit menu, switch off ignition, lock vehicle and read out fault memory. If necessary erase fault memory.

If faults still remain after erasing, proceed in accordance with diagnosis.