Memory Seat Adjustment: Other Porsche Cayenne I

General instructions/safety instructions

1. Never disconnect the battery with the engine running.
2. Never start engine if battery terminal clamps are not connected securely.
3. Never pull off or push on plug connections for the control modules or other electronic components when the ignition is switched on.

Possible causes of fault

Note. The 'possible causes of fault' leading to the fault are listed here. Please note that under certain circumstances after troubleshooting (e.g. if plugs are disconnected), other faults may be stored in the fault memory. After carrying out repairs, read out the fault memory of all control modules and erase any faults.

Fault type

The following types of fault are possible

1. No display
2. Upper limit exceeded
3. Lower limit not reached
4. Mechanical fault
5. No signal/communication
6. Base setting/adaptation incorrect or not present
7. Short circuit to positive
8. Short circuit to ground
9. Implausible signal
10. Open circuit/short circuit to ground
11. Open circuit/short circuit to positive
12. Open circuit
13. Electrical fault in electric circuit
14. Please read out fault memory
15. Faulty
16. Cannot be checked now

Fault status

The following types of status are possible

1. Present
2. Not present

This information should be saved using the Save key [F4] and printed out.

Note. Intermittent faults: If there are faults which occur intermittently, check the wiring positions which are linked to moving parts on and in the vehicle for each system. The different conditions which can give rise to faults must be simulated using the wiring diagram. Another suitable tool is the Porsche System Tester II No. 9588, which displays the current fault status and switches from 'static' (fault present) to 'intermittent' (fault was present, but is now absent).

Note. Visual inspection: During troubleshooting, check first that the affected pins on the plug connection for the driver's and/or passenger seat adjustment memory control module 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 where possible or 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 where necessary. Signals and voltages to the inputs of components and fuses must be guaranteed on the vehicle electrical system.

Note. With the 'short circuit to positive' fault, which is displayed using the [F8] key in the Porsche System Tester II No. 9588, conventional diagnosis/troubleshooting cannot be carried out for some fault codes. The reason for this is that the ignition cannot be switched on when there is no control module connected. It is therefore not possible to differentiate unambiguously between a short circuit to terminal 30 and a short circuit to terminal 15. Components and wiring must therefore be thoroughly inspected before any control module is replaced.

Tools

1. Never hang the Porsche System Tester II No. 9588 over the steering wheel!

Note. A suitable charging device must be connected to maintain battery capacity before starting the diagnosis. Plug contacts are optimally designed to suit the plug system. Interfering with the pins may give rise to contact problems. Always use suitable measurement tools for adapter plugs and test cables.

Scheme 381

Scheme 382

Scheme 383

Scheme 384

Scheme 385

Scheme 386

Scheme 387

Connector B, 6-pin

CONNECTOR PINS REFERENCE

Connector C, 6-pin

CONNECTOR PINS REFERENCE

Connector D, 6-pin

CONNECTOR PINS REFERENCE

Connector E, 6-pin

CONNECTOR PINS REFERENCE

Connector F, 6-pin

CONNECTOR PINS REFERENCE

Connector G, 4-pin

CONNECTOR PINS REFERENCE

1. An incorrect vehicle type was selected on the 9588 Porsche System Tester II.
2. The 9588 Porsche System Tester II is not connected correctly or is faulty.
3. Voltage supply to driver's memory seat adjustment control unit is not OK.
4. 'K lead' to 'gateway' in instrument cluster does not function.
5. 'Gateway' in instrument cluster does not function.
6. 'CAN drive' does not function.
7. 'Driver's memory seat adjustment control unit' does not function.

Affected pins

Memory seat adjustment control unit, driver's: Connector G

1. Pin 3 'CAN bus high [CAN comfort (high)]'
2. Pin 4 'CAN bus low [CAN comfort (low)]'

1. Driver's memory seat adjustment control unit (fault)

1. Open circuit in CAN comfort (No signal/communication)
2. KESSY control unit (No signal/communication)
3. Driver's memory seat adjustment control unit (No signal/communication)

Memory seat adjustment control unit, driver's: Connector G

1. Pin 3 'CAN bus high [CAN comfort (high)]'
2. Pin 4 'CAN bus low [CAN comfort (low)]'

1. Open circuit in CAN comfort (No signal/communication)
2. Vehicle electrical system control unit (No signal/communication)
3. Driver's memory seat adjustment control unit (No signal/communication)

Memory seat adjustment control unit, driver's: Connector G

1. Pin 3 'CAN bus high [CAN comfort (high)]'
2. Pin 4 'CAN bus low [CAN comfort (low)]'

1. No steering column adjustment (No signal/communication)
2. Steering column switch (with electronic unit) (No signal/communication)
3. Driver's memory seat adjustment control unit (No signal/communication)

Memory seat adjustment control unit, driver's: Connector G

1. Pin 3 'CAN bus high [CAN comfort (high)]'
2. Pin 4 'CAN bus low [CAN comfort (low)]'

1. No button functions (short circuit to ground)

Memory seat adjustment control unit, driver's: Connectors E, F and P

1. Connector E: Pin 6 'Hall-effect sensor 1'
2. Connector F: Pin 6 'Hall-effect sensor 2'
3. Connector P: Pin 6 'Hall-effect sensor 5'

1. Below lower limit (vehicle battery voltage is too low at less than 10.0 V)
2. Above upper limit (vehicle battery voltage is too high at more than 16.0 V)

Memory seat adjustment control unit, driver's: Connector G

1. Pin 1 'terminal 30 (voltage supply)'
2. Pin 2 'terminal 31 (ground supply line for ground pin 31)'

1. Cannot communicate with instrument cluster control unit (Please read out fault memory)
2. No acknowledgment sound output possible (No signal/communication)

Memory seat adjustment control unit, driver's: Connector G

1. Pin 3 'CAN bus high [CAN comfort (high)]'
2. Pin 4 'CAN bus low [CAN comfort (low)]'

1. Cannot communicate with rear convenience system control unit (No signal/communication)

Memory seat adjustment control unit, driver's: Connector G

1. Pin 3 'CAN bus high [CAN comfort (high)]'
2. Pin 4 'CAN bus low [CAN comfort (low)]'

1. Cannot communicate with driver's door control unit (No signal/ communication)
2. Stored mirror positions not available (No signal/communication)

Memory seat adjustment control unit, driver's: Connector G

1. Pin 3 'CAN bus high [CAN comfort (high)]'
2. Pin 4 'CAN bus low [CAN comfort (low)]'

1. Cannot communicate with passenger's door control unit (No signal/communication)
2. Stored mirror positions not available (No signal/communication)

Memory seat adjustment control unit, driver's: Connector G

1. Pin 3 'CAN bus high [CAN comfort (high)]'
2. Pin 4 'CAN bus low [CAN comfort (low)]'

1. No CAN message on CAN comfort (No signal/communication)
2. One or more control units connected to CAN comfort are faulty (Fault)

Memory seat adjustment control unit, driver's: Connector G

1. Pin 3 'CAN bus high [CAN comfort (high)]'
2. Pin 4 'CAN bus low [CAN comfort (low)]'

1. No seat belt height adjustment possible (short circuit to B+)
2. No seat belt height adjustment possible (open circuit/short circuit to ground)

Memory seat adjustment control unit, driver's: Connector P

1. Pin 2 'voltage supply for potentiometer 1'
2. Pin 3 'ground for potentiometer 1'
3. Pin 5 'seat belt height adjustment, potentiometer 1'

1. No steering column adjustment possible in horizontal direction (Electrical fault in electric circuit)
2. No steering column adjustment possible in horizontal direction (short circuit to B+)
3. No steering column adjustment possible in horizontal direction (short circuit to ground)
4. No steering column adjustment possible in horizontal direction (open circuit)

Memory seat adjustment control unit, driver's: Connector P

1. Pin 13 'steering column, Y-axis 2 (height adjustment motor)'
2. Pin 16 'steering column, Y-axis 1 (height adjustment motor)'

1. No steering column adjustment possible in axial direction (Electrical fault in electric circuit)
2. No steering column adjustment possible in axial direction (short circuit to B+)
3. No steering column adjustment possible in axial direction (short circuit to ground) No steering column adjustment possible in axial direction (open circuit)

Memory seat adjustment control unit, driver's: Connector P

1. Pin 14 'steering column, Z-axis 1 (fore-and-aft adjustment motor)'
2. Pin 15 'steering column, Z-axis 2 (fore-and-aft adjustment motor)'

1. Horizontal steering column adjustment motor only runs for a short time (short circuit to ground)
2. Horizontal steering column adjustment motor only runs for a short time (short circuit to B+)
3. Horizontal steering column adjustment motor only runs for a short time (open circuit)

Memory seat adjustment control unit, driver's: Connector P

1. Pin 6 'Hall-effect sensor 5 (sensor + Y-height adjustment)'
2. Pin 8 'Hall-effect sensor for steering column, Y-axis (sensor - Y-height adjustment)'

1. Axial steering column adjustment motor only runs for a short time (short circuit to ground)
2. Axial steering column adjustment motor only runs for a short time (short circuit to B+)
3. Axial steering column adjustment motor only runs for a short time (open circuit)

Memory seat adjustment control unit, driver's: Connector P

1. Pin 6 'Hall-effect sensor 5 (sensor + Z-fore-and-aft adjustment)'
2. Pin 10 'Hall-effect sensor for steering column, Z-axis (sensor - Z-fore-and-aft adjustment)'

1. No vertical lumbar adjustment possible (Electrical fault in electric circuit)
2. No vertical lumbar adjustment possible (short circuit to B+)
3. No vertical lumbar adjustment possible (short circuit to ground)
4. No vertical lumbar adjustment possible (open circuit)

Memory seat adjustment control unit, driver's: Connector C

1. Pin 5' vertical lumbar 1'
2. Pin 6 'vertical lumbar 2'

1. No horizontal lumbar adjustment possible (Electrical fault in electric circuit)
2. No horizontal lumbar adjustment possible (short circuit to B+)
3. No horizontal lumbar adjustment possible (short circuit to ground)
4. No horizontal lumbar adjustment possible (open circuit)

Memory seat adjustment control unit, driver's: Connector C

1. Pin 1 'horizontal lumbar 1'
2. Pin 2 'horizontal lumbar 2'

1. No seat belt height adjustment possible (Electrical fault in electric circuit)
2. No seat belt height adjustment possible (short circuit to B+)
3. No seat belt height adjustment possible (short circuit to ground)
4. No seat belt height adjustment possible (open circuit)

Memory seat adjustment control unit, driver's: Connector P

1. Pin 1 'seat belt height adjustment 1'
2. Pin 7 'seat belt height adjustment 2'

1. Adjustment only possible in inching mode for approx. two seconds (Short circuit to ground)
2. Adjustment only possible in inching mode for approx. two seconds (Short circuit to B+)
3. Adjustment only possible in inching mode for approx. two seconds (Open circuit)

Memory seat adjustment control unit, driver's: Connector F

1. Pin 2 'Hall-effect sensor for potentiometer 1'
2. Pin 6 'Hall-effect sensor 2'

1. Adjustment only possible in inching mode for approx. two seconds (short circuit to ground)
2. Adjustment only possible in inching mode for approx. two seconds (short circuit to B+)
3. Adjustment only possible in inching mode for approx. two seconds (open circuit)

Memory seat adjustment control unit, driver's: Connector F

1. Pin 5 'Hall-effect sensor, horizontal lumbar'
2. Pin 6 'Hall-effect sensor 2'

1. Control unit has been replaced, but not coded (Implausible signal)
2. Control unit has not been coded correctly (Implausible signal)

1. No button function (Short circuit to ground)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 23 'power supply to seat adjustment switch'

1. Button for fore-and-aft adjustment permanently in switching position (Mechanical fault)
2. Fore-and-aft adjustment button does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 3 'fore-and-aft adjustment'

1. Button for seat angle adjustment permanently in switching position (Mechanical fault)
2. Button for seat angle adjustment does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 4 'seat angle adjustment'

1. Button for seat height adjustment permanently in switching position (Mechanical fault)
2. Button for seat height adjustment does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 14 'seat height adjustment'

1. Adjustment only possible in inching mode for approx. two seconds (short circuit to ground)
2. Adjustment only possible in inching mode for approx. two seconds (short circuit to B+)
3. Adjustment only possible in inching mode for approx. two seconds (open circuit)

Memory seat adjustment control unit, driver's: Plug E

1. Pin 3 'Hall-effect sensor, inclination'
2. Pin 6 'Hall-effect sensor 1'

1. Adjustment only possible in inching mode for approx. two seconds (short circuit to ground)
2. Adjustment only possible in inching mode for approx. two seconds (short circuit to B+)
3. Adjustment only possible in inching mode for approx. two seconds (open circuit)

Memory seat adjustment control unit, driver's: Plug E

1. Pin 4 'Hall-effect sensor, seat height adjustment'
2. Pin 6 'Hall-effect sensor 1'

1. Seat angle adjustment motor does not function (Electrical fault in electric circuit)
2. Seat angle adjustment motor does not function (short circuit to ground)
3. Seat angle adjustment motor does not function (short circuit to B+)
4. Seat angle adjustment motor does not function (open circuit)

Memory seat adjustment control unit, driver's: Connector B

1. Pin 3 'seat angle adjustment 1'
2. Pin 6 'seat angle adjustment 2'

1. Seat height adjustment motor does not function (Electrical fault in electric circuit)
2. Seat height adjustment motor does not function (Short circuit to ground)
3. Seat height adjustment motor does not function (Short circuit to B+)
4. Seat height adjustment motor does not function (Open circuit)

Memory seat adjustment control unit, driver's: Plug D

1. Pin 2 'seat height adjustment 2'
2. Pin 5 'seat height adjustment 1'

1. Button for backrest angle adjustment permanently in switching position (Mechanical fault)
2. Button for backrest angle adjustment does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 5 'backrest angle adjustment'

1. Adjustment only possible in inching mode for approx. two seconds (Short circuit to ground)
2. Adjustment only possible in inching mode for approx. two seconds (Short circuit to B+)
3. Adjustment only possible in inching mode for approx. two seconds (Open circuit)

Memory seat adjustment control unit, driver's: Connector F

1. Pin 1 'Hall-effect sensor, backrest angle'
2. Pin 6 'Hall-effect sensor 2'

1. Backrest angle adjustment motor does not function (Electrical fault in electric circuit)
2. Backrest angle adjustment motor does not function (Short circuit to ground)
3. Backrest angle adjustment motor does not function (Short circuit to B+)
4. Backrest angle adjustment motor does not function (Open circuit)

Memory seat adjustment control unit, driver's: Connector C

1. Pin 3 'backrest angle adjustment 1'
2. Pin 4 'backrest angle adjustment 2'

1. Button for vertical lumbar adjustment permanently in switching position (Mechanical fault)
2. Button for vertical lumbar adjustment does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 1 'vertical lumbar'

1. Button for horizontal lumbar adjustment is permanently in switching position (Mechanical fault)
2. Button for horizontal lumbar adjustment does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 16 'horizontal lumbar'

1. Button for seat belt height adjustment is permanently in switching position (Mechanical fault)
2. Button for seat belt height adjustment does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 7 'seat belt height adjustment'

1. Fore-and-aft adjustment motor does not function (Electrical fault in electric circuit)
2. Fore-and-aft adjustment motor does not function (Short circuit to ground)
3. Fore-and-aft adjustment motor does not function (Short circuit to B+)
4. Fore-and-aft adjustment motor does not function (Open circuit)

Memory seat adjustment control unit, driver's: Connector B

1. Pin 4 'fore-and-aft adjustment 2'
2. Pin 5 'fore-and-aft adjustment 1'

1. Adjustment only possible in inching mode for approx. two seconds (Short circuit to ground)
2. Adjustment only possible in inching mode for approx. two seconds (Short circuit to B+)
3. Adjustment only possible in inching mode for approx. two seconds (Open circuit)

Memory seat adjustment control unit, driver's: Plug E

1. Pin 2 'Hall-effect sensor, fore-and-aft'
2. Pin 6 'Hall-effect sensor 1'

1. Button for saving seat position permanently in switching position (Mechanical fault)
2. Button for saving seat position does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 12 'memory button'

1. Button for memory position 1 permanently in switching position (Mechanical fault)
2. Button for memory position 1 does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 13 'position buttons 1, 2'

1. Button for memory position 2 permanently in switching position (Mechanical fault)
2. Button for memory position 2 does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 13 'position buttons 1, 2'

1. Button for memory position 3 permanently in switching position (Mechanical fault)
2. Button for memory position 3 does not function (Short circuit to B+)

Memory seat adjustment control unit, driver's: Connector A

1. Pin 8 'position buttons 3, 4'