Introduction
KESSY/immobiliserIntroduction
NOTE: The basic equipment of the Cayenne includes the immobiliser control module. The Porsche Entry & Drive (KESSY) function can also be integrated into the immobiliser control module. In fact, the assembly of both control modules is identical, but the Serv. Nos. are different (immobiliser control module: Serv. No. 9668 and KESSY control module: Serv. No. 9666). The diagnosis/troubleshooting provided here can be applied to both the immobiliser system and the KESSY system. The difference, from the point of view of diagnostics, is that the fault codes 0179, 0180, 0181, 0182, 0183, 0190, 0191, 0192 and 0193 cannot occur for the immobiliser control module. In addition, various menu and selection functions in the 9588 Porsche System Tester II are not used. In the component arrangement, the following components are omitted for the basic immobiliser: front left door antenna, front right door antenna, rear left door antenna, rear right door antenna, front left door sensor, front right door sensor, rear left door sensor, rear right door sensor, antennas on end of centre console, antenna on switching slot cover, loadspace antenna and the antennas on the rear bumper.
NOTE: The following troubleshooting diagnosis has been geared only towards left-hand drive vehicles and describes only these types of vehicles. In some cases, specified plugs and sockets may be assigned differently in right-hand drive vehicles, which can lead to incorrect interpretations during troubleshooting and to unforeseen accidents. Therefore, no work should be performed on right-hand drive vehicles without the correct wiring diagram and troubleshooting diagnosis description.
NOTE: After exchange/replacement of components such as the immobiliser control module, KESSY control module or vehicle key, a safety period runs down after the components are taught (to prevent misuse). It is not possible to start the engine during this time. If it is attempted to start the engine nonetheless, the message 'Immobiliser active' appears on the instrument cluster during the starting process. Switching the ignition on or off does not affect the waiting time. During this period, it is possible to perform work on the vehicle for which the engine need not be running (e.g. assembly/disassembly work).
NOTE: Software changes require the ignition to be switched on in order for the fault codes to be read out (condition for diagnosis) The exceptions are the following fault codes, which can be read out via menu item Special functions if the ignition cannot be switched on (see the following note): Fault codes 0003, 0087, 0166, 0171, 0172, 0173, 0174, 0175, 0176, 0177, 0178, 0185, 0288, 0576, 0668 and 1176.
NOTE: A electro-mechanical steering lock (ELV) adapted once using the 9588 Porsche System Tester II can no longer be re-adapted or only installed in the same vehicle.
NOTE: Some fault codes are generated in the immobiliser control module and KESSY control module that are registered and stored in the control module, but can be read out only via menu item Special functions (during selection of the vehicle type) because the ignition cannot be switched on once these fault codes have been stored. In detail, the codes are as follows: Fault code 0003, 0087, 0166, 0171, 0172, 0173, 0174, 0175, 0176, 0177, 0178, 0185, 0288, 0576, 0668 and 1176.
If the ignition can no longer be switched on, work through the following steps:
KESSY
Diagnosis software number for KESSY: 0201
Cayenne model year 2003
Immobilizer
Diagnosis software number for immobiliser: 0101
Cayenne model year 2003
General instructions/safety instructions
The following points must be observed during vehicle diagnosis:
- After the battery is connected, volatile memories must be reprogrammed. In the case of radio coding and tuning, the customer must be informed of decoding and the deleted tuner memory.
- After troubleshooting or repairs, erase the fault memory with the 9588 Porsche System Tester II and carry out a test drive.
- After the test drive, read out the fault memory with the 9588 Porsche System Tester II again.
DANGER:
Danger of injury through triggering of driver's airbag
- Never hang the 9588 Porsche System Tester II over the steering wheel.
WARNING:
Danger of injury and damage due to unusual vehicle handling when plugs or components are disconnected.
- Never disconnect plugs when the vehicle is in motion or drive the vehicle with plugs disconnected.
- Drive only with all parts fully installed and connected.
WARNING:
Danger of injury due to risk of fire in the event of short circuits in wiring harness and risk of fluids emerging from disconnecting relay (for battery interruption) when pressed
- The disconnecting relay (for battery interruption) must only be pressed by trained and authorised staff.
- Damage, abrasions or squashed wires in the wiring harness must be located and repaired.
- Short circuits to B+, short circuits to ground and open circuits in the entire wiring harness must be eliminated or repaired.
- Mechanical components must not be damaged in any way that could cause emerging fluids to ignite in the event of a short circuit.
WARNING:
Danger of personal injury by moving vehicle independently with gear engaged and engine running
- Before starting the engine in a vehicle with manual transmission, take the vehicle out of gear and put the hand brake on firmly
- Before starting the engine in a vehicle with automatic transmission, move the selector lever to position 'P' and put the hand brake on firmly
WARNING:
Danger of personal injury by moving vehicle independently with gear engaged, engine running and switching to any driving programme setting if plug C of the existing transmission wiring is not connected or is not connected correctly.
- Before starting the engine in a vehicle with automatic transmission, take the vehicle out of gear and put the hand brake on firmly
- Plug C of the existing transmission wiring (for multi-function switch, etc.) must always be connected before starting the engine
CAUTION:
Danger of damage due to improper handling of batteries and control module plug connections.
- Never disconnect battery with engine running
- Never start engine if battery terminal clamps are not connected securely
- Never pull off or push on plug connections for the control modules or other electronic components when the ignition is switched on
- Always disconnect the negative terminal of the battery and pull off all plug connections to the vehicle electrical system control module when carrying out welding work on the vehicle
Fault code setting conditions
Fault codes can be set in several circumstances, e.g.:
- battery disconnected
- plug connections disconnected
- faulty coding
- power failure
- etc.
In these circumstances, no fault is present in the system and the fault memory must be erased.
Troubleshooting procedure
Troubleshooting can only be performed when the fault is present. In other words, specific troubleshooting can only be performed in accordance with instructions (given under Diagnosis/troubleshooting for each fault code) if the entry has the status 'present' in the fault memory.
If the fault is currently 'not present', please check the following:
- Diagnosis conditions are met; if necessary perform a short test or test drive
- All plug connections and ground points of the affected current path are OK.
- Set all wiring harnesses of the affected current path to a state that corresponds to driving by pulling and shaking them (loose contact)
Diagnostic conditions
NOTE:
Important: Always connect a suitable battery charging device to the vehicle electrical system battery or to the designated jump-start terminal before starting diagnosis. All unnecessary loads must also be switched off.
NOTE:
The fault can only be identified if the requirements listed under 'Diagnostic conditions' are met. For this reason, the specified procedure must be observed after a fault is repaired:
1. Erase fault memory.
2. Satisfy the requirements listed under 'Diagnostic conditions'.
3. Read out fault memory again
Possible causes of fault
NOTE: The 'possible causes of fault' that are responsible for the fault are listed here. Please note that in certain circumstances further faults can be stored in the fault memory after troubleshooting (e.g. if plugs are disconnected). After carrying out repairs, read out the fault memory of all control modules and erase any faults.
Diagnosis/troubleshooting
NOTE: The fault memory Info key [F8] on 9588 Porsche System Tester II can be used to access the 'extended fault memory'. The following information can be displayed:
Fault type
The following fault types are possible:
- no display
- upper limit value exceeded
- lower limit value not reached
- mechanical fault
- no signal/communication
- no or incorrect basic setting/adaptation
- short circuit to B+
- short circuit to ground
- implausible signal
- open circuit/short circuit to ground
- open circuit/short circuit to B+
- open circuit
- electrical fault in electric circuit
- please read out fault memory
- faulty
- cannot be checked now
Fault status
The following status types are possible:
- present
- not present
This information should be saved using the Save key [F4] and printed out.
NOTE:
Visual inspection: During troubleshooting, please check first that the affected pins on the KESSY control module plug connection are neither damaged nor corroded. The wiring and plugs of the affected components must also be checked for external damage and correct contacts. Repair damaged or corroded pins if possible, otherwise replace affected pins. Repair or replace damaged wires.
NOTE:
Battery voltage and signals: A battery voltage of between 11.4 and 14.5 V is required for troubleshooting. This must be checked and provided if necessary. Both signals and voltages as well as components or fuses (input side) must be guaranteed on the vehicle electrical system.
NOTE: Conventional diagnosis/troubleshooting cannot be performed for some fault codes in the case of fault type 'short circuit to B+', which is displayed using the [F8] key in the 9588 Porsche System Tester II. The reason for this is that the ignition cannot be switched on when there is no control module connected. As a result, it is not possible to differentiate uniquely between a short circuit to terminal 30 and a short circuit to terminal 15. A thorough visual inspection of components and wiring must therefore be carried out before replacing a control module.
NOTE: The antennas in the rear bumper are wired in parallel. In addition, the antennas in the outer door handles are wired in parallel on the vehicle side. Given this, it is important to ensure during troubleshooting that various cut-off connections (door connectors, etc.) leading to other antennas are disconnected when taking measurements. Otherwise, the measurement results will not be meaningful. This is described in detail in the 'Diagnosis/troubleshooting' section of each fault code.
NOTE: Specified resistance values are based on an ambient temperature of 20 °C.