Reading Data Out From And Into The Control Unit For Steering Wheel Electronics

Information 

• If the control unit steering wheel electronics is renewed or exchanged, it must be programmed or coded using the Porsche System Tester. This is to adapt the control unit for steering wheel electronics to the vehicle and equipment. 
• If possible, before the control unit for steering wheel electronics is removed and replaced, a read-out of the vehicle data should be obtained from the Porsche System Tester. 
• If reading out the data is not possible, the new control unit for steering wheel electronics must be coded. →  Coding Control Unit For Steering Wheel Electronics  
• The power supply for the Porsche System Tester must be ensured while reading data out and in. A battery charger with a current rating of at least 40 A must be connected 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 in general terms; different texts or additions may appear in the Porsche System Tester. 

1. Supply power to the Porsche System Tester via the power supply unit, connect it to the vehicle and start. Switch on ignition. Continue with [>>].
2. Select vehicle type. Continue with [>>] key.
3. Select control unit for steering-column switch and activate with the [>>] key.
4. Select Control unit replacement and activate with the [>>] key.
5. Select Read out values and activate with the [>>] key.
6. The message Coding read-out complete will appear on the screen of the Porsche System Tester. Continue with [>>] key.
7. Switch off ignition and replace control unit for steering wheel electronics. → Removing Control Unit For Steering Wheel Electronics 
8. Switch on ignition. After replacement of the control unit for steering wheel electronics, the vehicle data are installed under the menu Write in data (see Section 6). Continue with [>>] key.
9. The message Coding write-in complete will appear on the screen of the Porsche System Tester. Continue with [>>] key.
10. Follow the Porsche System Tester instructions.
11. Read out the fault memory and, if necessary, erase it.
12. Calibrate steering angle sensor. → Calibrating Steering-Angle Sensor