Introduction

Seat adjustment memory

Introduction

NOTE: The same control modules are used for driver's seat adjustment memory and the passenger's seat adjustment memory. The modules differ in the programming depending on whether it is the driver or passenger and whether there are more or fewer vehicle fittings. In regard to the diagnostics, the passenger's memory seat adjustment control module does not include the fault codes 1331,1332, 1895,1896,1897 or 1898 or various menu and selection functions in the Porsche System Tester II No. 9588.

Seat adjustment memory control module
Diagnostics software number for the driver's seat adjustment memory control module: 0201
Diagnostics software number for the passenger seat adjustment memory control module: 0202
Cayenne model year 2003

General instructions/safety instructions

CAUTION:
Risk of damage from improper handling of batteries and control module plug connections.
- Never disconnect the battery with the 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.

Troubleshooting procedure
Troubleshooting can only be carried out 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', check the following:
- Diagnostic conditions are met
- All plug connections and ground connections of the affected current path are OK.
- Pull and shake all wiring harnesses in the relevant current path to simulate the conditions which occur when driving the vehicle.

Conditions for diagnosis

NOTE:
Important: Always connect a suitable battery charging device to the vehicle electrical system battery before starting the diagnosis. Also switch off all unnecessary loads.

NOTE:
The fault can only be identified it the requirements listed under Conditions for diagnosis 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 'Conditions for diagnosis'.
3. Carry out a test drive
4. Read out fault memory again

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.

Diagnosis/troubleshooting

NOTE: The fault memory Info key [F8] on Porsche System Tester II No.9588 can be used to access the 'extended fault memory'. The following information can be displayed:

Fault type

The following types of fault are possible:
- No display
- Upper limit exceeded
- Lower limit not reached
- Mechanical fault
- No signal/communication
- Base setting/adaptation incorrect or not present
- Short circuit to positive
- Short circuit to ground
- Implausible signal
- Open circuit/short circuit to ground
- Open circuit/short circuit to positive
- Open circuit
- Electrical fault in electric circuit
- Please read out fault memory
- Faulty
- Cannot be checked now

Fault status

The following types of status are possible:
- Present
- Not present

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

NOTE:
Intermittent faults: It there are tau Its 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.