Keyless Entry Module: Service and Repair
WM 966619 Removing and installing KESSY/PAS control unit
Tools
Information
Control unit information for KESSY/PAS
Information
If the KESSY/PAS control unit 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 unit is removed and replaced, a read-out of the vehicle data should be obtained from the Porsche PIWIS Tester 9718 System Tester.
- Follow the instructions for the Porsche System Tester.
The KESSY/PAS control unit can only be taught once for one vehicle. Switching is not possible.
Programming KESSY/PAS control unit
Obtaining read-out and saving vehicle data from control unit
1. Connect the PIWIS Tester 9718 to the vehicle and start the System Tester. Switch on ignition. Press >> to continue.
2. Select vehicle type using the cursor keys.
3. Switch to Control units.
Information
In order to guarantee the function of the control unit after teaching, the coding value in the old control unit must be read out or determined again. This value must be written into the new control unit after teaching.
If the control unit cannot be read out again, it must be coded according to the vehicle equipment after the control unit has been replaced manually. PAS menu - Coding.
4. Select 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 (vehicle data) with the cursor keys and press the >> key.
7. The note Coding read-out complete will appear on the screen of the Porsche System Tester.
8. After the PAS/KESSY/Immobiliser control unit has been replaced, the data that is read out is loaded in via the Control unit replacement - Write in data menu (see Item 6).
9. The KESSY/PAS control unit and vehicle keys must then be taught. -> 966619 Removing and installing KESSY control unit - "Programming" section
Removing KESSY/PAS control unit
Installation position shown on the 911
To provide a clearer picture, the illustrations are shown from the bulkhead view.
1. Release and open the locking lever located "in the forward direction of travel".
Pivotting out securing bolt and unclipping control unit
2. Lift control unit at front out of the support for the steering wiring.
3. Push control unit forward in "direction of travel" and disengage it from the support for the steering wiring.
Disengaging control unit at both plates
WARNING
Risk of damage to electronic control modules.
- If care is not taken, electrical and electronic components may be destroyed.
-> Before removing the control module, switch off the ignition and remove the ignition key.
Information
Depending on the vehicle equipment, the control unit has one or two connectors.
4. Release both electrical connectors -1, 2- -A- and unplug them from the control unit.
Releasing and unplugging connectors
5. Take out the control unit.
Installing KESSY/PAS control unit
WARNING
Risk of damage to electronic control modules.
- If care is not taken, electrical and electronic components may be destroyed.
-> Before removing the control module, switch off the ignition and remove the ignition key.
Information
Depending on the vehicle equipment, the control unit has one or two connectors.
1. Press both electrical connectors -1, 2- into control unit and lock them until they are felt to engage.
Inserting the connectors
2. Engage control unit in support for wiring harness with both retaining lugs.
Engaging control units at both retaining lugs
3. Clip in control unit on the support for the steering wiring and engage the locking mechanism for the lock.
Clipping in control unit + pivotting out securing bolt
Programming KESSY/PAS control unit
Information
All original keys are required for teaching.
Information
If a new KESSY/PAS control unit is installed in a vehicle, the immobiliser code, Teach Enable Code (TEC), ELV Secret Key, Transponder password and Transponder Secret Key specified in IPAS must be entered.
You can get the codes from IPAS or from your importer by specifying the vehicle identification number.
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.
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 generally, different text or additions may appear in the Porsche System Tester.
In order to guarantee the function of the control unit after teaching, the coding value in the old control unit must be read out or determined again. This value must be written into the new control unit after teaching. => Removing and installing KESSY control unit - "Reading out" section
1. Ignition off.
2. Replace control unit. => Removing and installing KESSY control unit - section on "Removing"; => Removing and installing KESSY control unit - section on "Installing"
Information
Once a new KESSY/PAS control unit has been installed, the ignition can no longer be switched on. In order for the Tester to be able to identify the new control unit, the warning indicator light must remain switched on during the teaching procedure. This will activate CAN.
3. Insert ignition key and switch on hazard warning light switch.
4. Select vehicle type.
5. Switch to the list of control units and press >>.
6. Select PAS using the cursor keys and press >>.
7. Switch to the Teaching functions menu and select Teach control unit. Then press >> to continue.
8. Enter the Teach Enable Code TEC from IPAS and press >>. Then press F7 to confirm your entry.
9. Enter vehicle identification number and press >>. Then confirm your entry by pressing F7.
10. Enter the ELV Secret Key from IPAS and press >>. Then press F7 to confirm your entry.
11. Enter immobiliser code from IPAS and press >>. Then confirm your entry by pressing F7.
12. Enter the Transponder password and press >>. Then confirm your entry by pressing F7.
13. Enter the Transponder Secret Key and press >>. Then confirm your entry by pressing F7.
14. The Tester displays the message: Control unit taught, Teach keys. Switch to the menu Teach keys >>.
15. Enter the Teach Enable Code TEC from IPAS and press >>. Then press F7 to confirm your entry.
16. Enter the Number of keys and press >>. Then confirm your entry by pressing F7.
17. Enter the Transponder password and press >>. Then confirm your entry by pressing F7.
18. Enter the Transponder Secret Key and press >>. Then confirm your entry by pressing F7.
19. The Tester displays the following prompt: Insert key 1 >> , Insert key 2 >> , etc. until the relevant number of keys is reached.
20. Observe Tester information regarding Synchronisation of keys, insert key and press the Lock button on the key for at least 5 seconds when instructed to do so by the Tester.
21. Wait 5 seconds before switching on the ignition. Switch on the ignition, read out the fault memory of all control units, and erase them if necessary.
22. << returns you to the vehicle type. You can then select the special functions on the control unit side and carry out a vehicle handover.
23. Then read out the fault memory again, and erase the fault memory for each faulty control unit.
24. Start the engine with each of the keys one after the other.
Information
In order to guarantee the function of the control unit after teaching, the coding value in the old control unit must be read out or determined again. This value must be written into the new control unit after teaching.
If the control unit cannot be read out again, it must be coded according to the vehicle equipment after the control unit has been replaced manually. PAS menu - Coding.
25. In the menu PAS Coding, select the coding requested by the customer and then press F8 to start coding.
26. The Kessy/PAS has now been taught. Check the remote controls on the vehicle for correct function.