247019 Removing and installing DME (DFI) control unit
WM 247019 Removing and installing DME (DFI) control unit
Tools
Information
- If the DME control unit is replaced, it must be programmed using the PIWIS Tester 9718. This adapts the DME control unit to the vehicle, the country version and the equipment. The DME control unit is located in the plenum panel near the right wing.
- Before the DME control unit is removed and replaced, a read-out of the vehicle data should be obtained (if possible) using the PIWIS Tester 9718.
- 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.
Overview of DME control unit
Exhaust emission standard
Information
The exhaust emission standards are continually being adapted and expanded for new markets.
- The table below shows the data records for PIWIS Tester software version 17.10.
- Later PIWIS Tester software will show additional data records.
- The data records must be selected according to vehicle equipment and legal specifications and must be loaded onto the DME (DFI) control unit.
Obtaining read-out and saving vehicle data from DME control unit
1. PIWIS Tester 9718 must be connected to the vehicle. Start the PIWIS Tester.
2. Select vehicle type and select DME/DFI control unit.
3. Select Control unit programming with the cursor keys and press >>.
4. Select the Read out vehicle data menu and press >>.
5. The PIWIS Tester 9718 screen displays the message "Vehicle data was read out".
6. Switch off ignition and remove ignition key. Refit DME (DFI) control unit.
7. After replacement of the DME (DFI) control unit, the vehicle data that was read out is loaded under the Control unit programming menu by selecting Write vehicle data.
Removing DME control unit
CAUTION
Risk of short circuit.
-> Before removing the control unit, switch off the ignition.
Information
- Unscrew the two fastening screws for the cowl panel cover and lift up the cover in this area. => 664419 Removing and installing cowl panel cover
1. Slide the two retaining clips aside -arrows- and pull control unit out to the front.
Retaining clips for control unit
2. Pull out lock on both connectors in -direction of arrow- and take off the connectors.
Lock on connectors
Installing DME control unit
1. Insert both connectors into the control unit and push in latch in -direction of arrow-.
Latch for connectors
2. Insert control unit and secure with the two retaining clips -arrow-.
Retaining clips for control unit
Programming new DME (DFI) control unit
Information
In some countries (currently USA, Canada), the Ready status must be obtained following a test drive or by using the PIWIS Tester 9718 after a DME (DFI) control unit has been programmed. If in doubt, contact the relevant importer.
The DME (DFI) control unit must be adapted in accordance with specifications => 24701900 Removing and installing DME control unit - section on "Information".
Information
If a new DME (DFI) control unit is installed in a vehicle, the immobiliser code documented in the PIWIS information system must be taught in the DME control unit using the Program immobiliser code menu.
When programming the DME (DFI) control unit, it is essential to guarantee the power supply for the Porsche System Tester. A battery charger with a current rating of at least 40 A must be connected to the vehicle battery.
The PIWIS Tester 9718 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 and has been described for version 17.10; different text or additions may appear with later Tester versions.
Information
- During programming, the electric radiator fans may start.
1. Switch on ignition using original key, connect the PIWIS Tester 9718 to the vehicle and start the PIWIS Tester.
2. Select vehicle type and select DME/DFI control unit.
3. Select Control unit programming with the cursor keys and press >>.
4. Select the Read out vehicle data menu and press >>.
5. Switch off ignition and replace DME (DFI) control unit with a new DME (DFI) control unit. => 247019 Removing and installing DME control unit - section on "Removing"
6. After replacement of the DME (DFI) control unit, the vehicle data that was read out is loaded under the Control unit programming menu by selecting Write vehicle data. Press >>.
7. Select the Program control unit menu and press >>.
8. Observe System Tester conditions and press >>.
9. Vehicle type must be selected. Press >>.
10. Model year must be selected. Press >>.
11. Transmission type must be selected. Press >>.
Information
For the exhaust emission standard, the data record must be selected according to A, B and C markets for each specific country. => 0300IN Overview of A, B and C markets
12. Exhaust standard must be selected. Press >>. => 247019 Removing and installing DME control unit - section on "Information"
13. Program control unit and confirm with F8.
Information
- During programming, the electric radiator fans may start.
14. The data and programming status is then loaded on to the DME control unit. Do not interrupt the programming sequence.
15. The System Tester indicates whether the control unit can be programmed and the approximate programming status.
16. Once the DME control unit has been programmed successfully, switch to the Program immobiliser code menu and press >>.
17. Enter the New immobiliser code (PPN) and press >>. Check the code again and confirm with F7.
18. When the programming period expires, follow the instructions on the Porsche System Tester.
19. For the learning and adaptation routine of the throttle valve (electronic accelerator), switch the ignition off and then on again for 60 seconds without starting the engine. Do not actuate the accelerator pedal. Switch ignition off again for at least 10 seconds. Switch on ignition. This completes the adaptation of the throttle valve adjusting unit and the programming sequence is complete.
20. Read out the fault memory and delete the DME control unit fault on every control unit connected to the CAN.
21. Carry out a test drive and read out fault memory.
Teaching DME (DFI) control unit
Information
If the DME (DFI) control unit you are installing has already been taught (control unit was already taught in a vehicle), proceed according to the description given here.
This procedure should only be used for test purposes (troubleshooting in the fuel system). It is important that the data record programmed on the DME (DFI) control unit that was already taught matches the data record for the vehicle used here. The vehicle type, transmission type, model year and emission standard must all match. If the data is different, the control unit must be re-programmed. See => 24701900 Removing and installing DME control unit - section on "Programming"
Information
If a new DME (DFI) control unit is installed in a vehicle, the immobiliser code documented in the PIWIS information system must be taught in the DME control unit using the Program immobiliser code menu.
When programming the DME (DFI) control unit, it is essential to guarantee the power supply for the Porsche System Tester. A battery charger with a current rating of at least 40 A must be connected to the vehicle battery.
The PIWIS Tester 9718 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 and has been described for version 17.10; different text or additions may appear with later Tester versions.
1. PIWIS Tester 9718 must be connected to the vehicle. Start the PIWIS Tester.
2. Select vehicle type and select DME/DFI control unit.
3. Select Control unit programming with the cursor keys and press >>.
4. Switch to the Program immobiliser code menu and press >>.
5. Enter the Old immobiliser code (PPN, vehicle - OLD) and press >> to continue. Check the code again and confirm with F7.
6. Enter the New immobiliser code (PPN, vehicle - NEW) and press >> to continue. Check the code again and confirm with F7.
7. When the programming period expires, follow the instructions on the Porsche System Tester.
8. For the learning and adaptation routine of the throttle valve (electronic accelerator), switch the ignition off and then on again for 60 seconds without starting the engine. Do not actuate the accelerator pedal. Switch ignition off again for at least 10 seconds. Switch on ignition. This completes the adaptation of the throttle valve adjusting unit and the programming sequence is complete.
9. Read out the fault memory and delete the DME control unit fault on every control unit connected to the CAN.
10. Carry out a test drive and read out fault memory.