Replacing TPM Control Unit
WARNING: This page is about a different variant/trim than selected.
NOTE:
Voltage drop
- Risk of irreparable damage to control unit
- Risk of damage to control unit
- Fault entries in the control unit
- Coding in the control unit is aborted
- Malfunctions in control unit, even during programming
→ Prior to disconnecting the control unit, switch off ignition and remove ignition key.
→ Ensure that the power supply is not interrupted during programming.
→ Connect a battery charger with a current rating of at least 90 A to the vehicle battery
Information
The PIWIS Tester instructions take precedence since the description may be different with later Tester releases.
The procedure described here has been structured in general terms. Different text or additional information may appear on the PIWIS Tester.
- Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on ignition. Press to continue.
- Select the vehicle type and start the PIDT.
- Select the required control unit, i.e. Tire Pressure Monitoring (TPM) in the overview
- Maintenance/repairs must then be selected
- Control unit replacement must now be selected. Then press
- Read data must now be selected. Then press
- Follow the instructions on the Tester.
- Switch off ignition and replace control unit.
> 443419 REMOVING AND INSTALLING TPM CONTROL UNIT
Press to continue.
- Switch on ignition and press to continue. The data that was read out is installed
- The System Tester displays the message Coding has been completed successfully. Press to continue
- Message displayed on Tester: Wheel IDs must be received once by the new control unit. Release the air on all four wheels for 5 seconds.
- Teach wheel IDs without driving must be selected, then press
- Wheel IDs unknown. Press
- Follow the instructions on the Tester and press. Reduce the respective tire pressure for approx. 5 seconds as instructed by the Tester and follow the instructions.
- Adapt tire pressure according to specifications.
- Select Automatic coding in the Coding/adaptation menu and press
- Read out the fault memory and erase it if necessary
- Return to the control unit overview
- Check the TPM function during the test drive.