Power Distribution Module: Service and Repair

WM 971019 Removing and installing vehicle electrical system control unit

Preliminary work

Remove cover under left instrument panel. => 702219 Removing and installing cover under instrument panel - section on "removing"

Removing vehicle electrical system control unit





Overview of vehicle electrical system control unit

1. Remove ignition key.
2. Pull control unit slightly downwards out of the holder.





Removing vehicle electrical system control unit

3. Release and remove bottom plugs. Pull control unit completely out of the holder.





Pulling off bottom plugs

4. Release and remove top plugs.





Pulling off top plugs

5. Remove control module.

Installing vehicle electrical system control unit

1. Push on top row of plugs until they are felt to engage.





Connecting top plugs

2. Push on bottom row of plugs until they are felt to engage.





Connecting bottom plugs

3. Push control unit upwards into the holder, making sure it engages. Make sure the electrical leads are not pinched.

Subsequent work

Install cover under left instrument panel. => 702219 Removing and installing cover under instrument panel - section on "installing"

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. => 971019 Removing and installing vehicle electrical system control unit - section on "Removing"
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 Repair Group 9710 Technical Manual, Diagnosis.