Entry & Drive Function
Entry & Drive Access Function
- Access to the vehicle is gained via Keyless Entry, remote control and the mechanical closing function.
- For keyless operation, a valid key must be detected within one meter of the vehicle (six antennas). The vehicle is unlocked as soon as the proximity sensors detect that someone with a valid key is approaching a door handle.
- The signals from the remote control are received by a UHF antenna.
- Unauthorized use of the vehicle is prevented by the electromechanical steering lock (ELV) and a key transponder (Online Engine Immobilizer - Generation 5). Detection of a valid key initiates communication between the engine immobilizer and the engine control unit and the engine can be started.
As part of the brand's increasingly advanced user-friendliness, the Porsche Entry & Drive functions have been implemented in the Panamera, as previously in the Cayenne (E1). Porsche Entry & Drive allows the vehicle to be used without having to actively handle the key. The user only needs to have the key with them to open/close the vehicle or to start the engine. To illustrate this functionality, the ID transmitter function has been added to the remote control electronics (vehicle key). The set of functions now available with this feature enables the secure exchange of data between the vehicle and the key when the user wishes to gain keyless access to the vehicle or wishes to start the vehicle.
The familiar key functions - remote control, central locking and operation via the ignition lock as back-up - are also retained. On the vehicle side, the intelligence necessary to perform the various functions is integrated into the front-end electrics control unit at the front. Proximity sensors have been integrated into the four outer door handles and in the area around the external antennas on the door sills to facilitate keyless access (Porsche Entry).
The system detects the user's intention to access the vehicle by means of these proximity sensors and initiates a coded request via the external antennas. Located on the side on which the intention to access has been detected, an authorized key receives the request and returns an appropriate, encoded response to the control unit in the vehicle. Following positive authentication of the key, the central locking system is released in accordance with the selected setting. The communication interface between the vehicle and the key is limited to approx. 1.5 m. The key can receive the signal from the external antennas within this range.
When leaving the vehicle, the procedure is identical to that for accessing it. After closing the doors, the user only needs to press one of the locking buttons in the outer door handles to initiate the request to the externally located key. If this request is correctly answered by the key, the vehicle is locked. It is also possible to open the rear of the vehicle without actively using the key. The key must simply be located externally, within a range of approx. 1.5 m from the rear of the vehicle.
To start the opening process, the user must press the rear button. As when approaching a door, pressing this button sends a request to the key via the antenna integrated in the rear. Following authentication of the key, the relevant part of the tailgate is released and can be opened. To start the vehicle, the key just needs to be inside it. If the operating element in the ignition lock is actuated, the system initiates a request to the key. If the key is inside the vehicle, it detects the request and returns an appropriate, encoded response. Based on this response, the steering column lock is released electromechanically, the ignition is activated and once the engine immobilizer has been authenticated, the engine is started via the engine control. The engine is switched off by moving the operating element into the off position.
Access and Driving Authorization
Since the ELV is a safety-related component, electric activation is ensured by two independent control units. The first channel controls the supply voltage for the logic and the internal sensors of the ELV. The front-end electronics and ELV communicate by means of the LIN bus. In addition to activation, the LIN interface is also responsible for the complete diagnosis of the ELV.
The supply voltage for the drive link is switched via the second channel. The front-end electrics control unit also receives the unlocking status via a microswitch/sensor for activating the drive link. The ELV is a embedded logic component control unit and, in addition to its electrical aspects, also has a mechanical interface with the steering column.
Unintentional, faulty locking of the ELV and consequently blocking of the steering is ruled out in all cases. On request, a status for blocking or releasing the steering is adopted by the ELV, i.e. after a particular action, the ELV must always have either an "unlocked" or "locked" status. An electric drive link actuates the locking mechanism, which engages in the steering column.
Unauthorized use of the vehicle is prevented by the electromechanical steering lock (ELV) and a key transponder that detects an invalid key in the ignition lock (in the case of Keyless Entry in the passenger compartment). Detection of a valid key initiates communication between the engine immobiliser and the engine control unit and the engine can be started.
Locked:
Key operation: Removing the key from the ignition lock Keyless operation: Locking the vehicle or deliberate locking, i.e. after switching off terminal 15 by actuating the control panel again in the "Lock ELV" position for t-2 seconds
Unlocked:
Key operation - By unlocking the central locking system and then opening the driver's door or by inserting a valid key in the electronic ignition lock.
Keyless operation - Unlock the central locking system and open the driver's door or initiate a trigger event for the passenger compartment query (activate ignition or start), valid ID transmitter is detected in the vehicle passenger compartment.
Anti-Theft Protection
A passenger compartment sensor and an inclination sensor help to safeguard against theft. The interior surveillance system, including the associated sensors (transmitter and receiver), are located in the rear section of the roof console. Their status is queried via the LIN.
As a sub-function of the alarm system, the vehicle's passenger compartment is monitored for movement when the alarm system is active. Ultrasonic technology in the roof module is used for monitoring the passenger compartment. The ultrasonic sensors sense via two suitable openings (fleece) into the interior of the vehicle.
The interior surveillance and inclination sensor, if required, are activated and deactivated by the alarm system control unit (BC control unit) via a LIN bus, which is also used to the transmit the status and diagnostic functions.
Online Engine Immobilizer - Generation 5 (WFS5)
With the launch of the Panamera, Porsche AG is introducing the Online Engine Immobilizer Generation 5. The engine immobilizer may need to be serviced because of newly installed control units or in order to teach new vehicle keys. Preconditions for this are: PIDT, VCI module, online access and PPN registration (ATP = Anti-Theft Protection).
The learning process can be broken down into four steps:
1. Start the Immobilizer - Generation 5 teaching application (PIDT/Main menu/Diagnose/Online Teaching Function)
2. Switch on ignition
3. Teach control units
4. Teach key
1.Starting the Immobilizer - Generation 5 teaching application
The system first checks whether all the required control units are installed. If a control unit is not present, teaching for that control unit is not possible. The learning process must be repeated after the control unit has been installed. The learning process is terminated if the front-end electronics or ELV are not present. Otherwise, the chassis number of the vehicle is read from the control units and the user can then accept or change it. In order to continue with the learning process, the user must authenticate himself in the PPN.
2.Switching on ignition
A further condition for successful learning is that the vehicle ignition is switched on. This can be done
a. manually or b) via the diagnostics:
a. If an intact control unit network is present and a key has already been taught, the ignition can be switched on using this key during the learning process.
b. If all control units are present, but are not connected to form an intact control unit network or if no taught key exists for an intact network, the components (control units and keys) are checked for authenticity and, if they pass, the ignition is then switched on via the diagnostics.
c. If the control units or keys do not match the vehicle or if their ID is unknown or reported as stolen, the learning process is aborted. (Cancellation of the learning process due to an invalid identification is still possible in step 3.)
3.Teaching control units
During the learning process, the tester reads out the required control unit data and forwards it via the PPN. Once this data has been checked in the engine immobilizer database, the activation data is supplied to the tester. This writes the data to be taught to the control units.
4.Teaching the keys
In the last section of the learning process, the user enters the number of keys to be taught for the particular vehicle (entry range permitted: 1 to 8). You are then requested to insert all the keys into the ignition lock, one after the other, so that the system can read the key IDs. A key with an ID not assigned to the vehicle is not taught. After the key insertion process, the user can see in an evaluation report whether all keys have been successfully taught.
Home Link
The Panamera features a Home Link system that actuates the garage door drive, gate to property, alarm system or door locking. The programmed function is activated by pressing the relevant button in the keypad of the roof console. The garage door opener used in North America assigned frequency range 288 MHz - 418 MHz.
Deleting Programmed Signals From The Buttons
This process deletes the standard factory-set codes. Do not repeat this process if you want to assign additional signals to the buttons. Keep the two outer buttons (arrows in above illustration) on the overhead operating console pressed down for approx. 20 seconds until indicator light A on the button begins to flash quickly.
To delete the programmed signals and save garage door opener signals, the ignition must be switched on and the direction indicators switched off. When using the garage door opener, the vehicle must be in range of the receiver.
Assigning Home Link to Button With Fixed Code System
1. The standard factory-set codes must be deleted before programming for the first time.
2. Keep the required button pressed down in the keypad on the overhead operating console until indicator light A on the button begins to flash slowly. The button is now ready to learn for five minutes.
3. Hold the original hand-held transmitter approx. 30 cm from the marked position and keep the send button pressed down until the vehicle's direction indicator lights light up three time or indicator light A flashes quickly. Three flashes of the direction indicator lights and the rapidly flashing indicator light A confirm that the new signal has been programmed successfully. A number of attempts may be necessary at different distances between the vehicle and the original handheld transmitter.
4. Once the five-minute learning period has expired, the direction indicator lights flash once. Repeat steps 2 and 3.
5. Repeat steps 2 to 4 to assign signals to the other buttons.
Assigning Home Link to Button With Variable Code System
1. The standard factory-set codes must be deleted before programming for the first time.
2. Keep the required button pressed down in the keypad on the overhead operating console until indicator light A on the button begins to flash slowly. The button is now ready to learn for five minutes.
3. Hold the original hand-held transmitter approx. 30 cm in front of the bumper and keep the send button pressed down until the vehicle's direction indicator lights light up three time or indicator light A flashes quickly. Three flashes of the direction indicator lights and the rapidly flashing indicator light A confirm that the new signal has been programmed successfully. A number of attempts may be necessary at different distances between the vehicle and the original hand-held transmitter.
4. To synchronize the system: Press the programming button on the receiver for the garage door opener. Afterwards, you usually have approx. 30 seconds to initiate step 5.
5. Press the button in the keypad of the overhead operating console selected in step 2 (with some devices, you need to press the button in the keypad several times in order to complete the setting process).
6. Repeat steps 2 to 5 to assign signals to the other buttons.
To Reprogram a Single Button
1. Keep the button to be programmed in the keypad of the overhead operating console pressed down (approx. 20 seconds) until indicator light A on the button flashes slowly. The button is now ready to learn for five minutes.
2. Hold the original hand-held transmitter approx. 30 cm from the marked position and keep the send button pressed down until the vehicle's direction indicator lights light up three time or indicator light A flashes quickly. Three flashes of the direction indicator lights and the rapidly flashing indicator light A confirm that the new signal has been programmed successfully. A number of attempts may be necessary at different distances between the vehicle and the original handheld transmitter.