Coding Control Unit
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 → Nominal value: 40 A to the vehicle battery.
Information
The PIWIS Tester II 9818 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 in PIWIS Tester II 9818 .
- Switch off ignition and replace control unit. → 443419 REMOVING AND INSTALLING TPM CONTROL UNIT .
- Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on ignition.
- Select the vehicle type and start the diagnostic application.
- Select the required control unit, e.g. Tyre Pressure Monitoring system in the overview .
- Codings/adaptations must now be selected.
- Automatic coding must now be selected. Then press [F12] to continue.
- The Tester displays the message Coding has been completed successfully . Press [F12] to continue.
- Read out the fault memory and erase it if necessary.
- Return to the overview of control units.
- Check the function of the Tyre Pressure Monitoring (TPM) system during the test drive.