Steering Column Control Module: Service and Repair
Removing and installing ELV control unit
Preliminary work
Preliminary work for ELV control unit
1. If the ELV (electronic steering column lock) control unit has to be replaced, the values must be read out using the PIWIS Tester 9718 before removing the control unit.
2. Insert ignition key into the ignition lock. The electronic steering column lock (ELV) must unlock.
3. Disconnect the battery.
4. Remove the steering column.
Removing ELV control unit
Installation position
Information:
The ELV control unit is engaged in the steering column and is clamped securely with a fastening screw.
The fastening screw comes with the ELV control unit.
Fastening screw for ELV control unit
1. Screw the fastening screw -1- as far as it will go into the ELV control unit.
Screwing in fastening screw
2. Slide the ELV control unit back, disengage it from the steering column and remove it by moving it upwards.
Disengaging ELV control unit from the steering column
Installing ELV control unit
1. Check the installation position of the plastic guide for the ELV control unit and insert the plastic guide into the opening in the steering column.
Checking installation position of plastic guide
2. Position ELV control unit on the steering column and engage it by pressing it forward.
Engaging ELV control unit in steering column
3. Unscrew the fastening screw -1- on the ELV control unit until the fastening screw -1- connects with the steering column. - Tightening torque: 6 Nm (4.5 ftlb.)
ELV control unit on steering column
Subsequent work
Subsequent work for ELV control unit
1. Install the steering column.
2. Carry out work instruction after disconnecting the battery.
3. If a new ELV control unit was installed, it must be taught using the PIWIS Tester 9718.
Programming ELV control unit
Warning:
Sudden voltage interruption of the power supply to the control unit.
^ Risk of irreparable damage to the control unit.
- During programming, 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.
Information:
Follow the instructions on the Tester.
Later versions of the software may display slightly different text or require a slightly different procedure. The instructions you receive from the tester itself take precedence over this description.
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 using the cursor keys.
3. Move from vehicle type to the list of control units and press >>.
4. Select the required control unit PAS 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 Porsche System Tester screen displays the message Values were read out >>.
8. Switch off ignition, insert ignition key, disconnect the battery and replace the control unit.
9. After you have replaced the ELV control unit, the ignition will not switch on again. >> Switch on hazard warning lights.
10. Select the PAS menu on the System Tester and press >>.
11. Select the Teaching function menu and press >>.
12. Select the Teach ELV menu and press >>.
13. Enter the Teach Enable Code TEC (from the PIWIS information system) and press >>. Then press F7 to confirm your entry.
14. The message ELV taught appears. Press <<, switch on ignition (the ELV unlocks the steering column) and turn off hazard warning lights.
15. << Return to vehicle type, select Special functions on the control unit side and carry out a vehicle handover.
16. In the PAS menu, select Control unit replacement and Write values >>.
17. Then read out the fault memory of all control units and erase the fault memory for each faulty control unit.
18. Start the engine and switch it off again, then remove the ignition key. The ELV control unit must lock the steering column.