Calibrating Control Unit For Distance Measuring Sensor

NOTIFICATION 

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 
  1. → Switch off ignition before disconnecting the control unit.
  2. → Make sure that the power supply is not interrupted during programming.
  3. → Connect a battery charger with a current rating of at least > Current 90 A  to the vehicle battery.

Information 

Before and after fitting the trim cover, for the distance measuring sensor control unit, check the following points:

• The holder for the distance measuring sensor control unit must not show any signs of deformation, which may have been caused, for example, by removing or installing the trim cover for the distance measuring sensor control unit. If the holder for the distance measuring sensor control unit is deformed, carefully push it back into shape. 
• If the trim cover is damaged or cracked, replace the trim cover. 
• After fitting the trim cover, check that it is seated correctly and securely. 

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. 

1. Connect the Tester to the vehicle and start it. Switch on ignition.
2. Select the vehicle type if required.
3. Select the Distance measuring sensor  control unit in the overview.  Press F12 to continue. The message "Create Vehicle Analysis Log (VAL)?" appears. Press F11 to continue.
4. Maintenance/repairs  must now be selected.
5. Calibration  must now be selected. Press F12 to continue.
6. Follow the instructions on the Tester. Press F12 to continue.
7. Follow the instructions on the Tester. If necessary, adjust the sensor -1-  using adjusting tool -2-  according to specifications on the Tester -3-  .

   Courtesy of PORSCHE CARS NORTH AMERICA, INC.

   Adjusting screws for distance measuring sensor control unit

8. Repeat the process until the message Adjustment successful  appears on the Tester.
9. Read out the fault memory, correct faults that are stored if necessary and clear the fault memory.
10. Exit the diagnostic application. Switch off ignition. Disconnect the Tester from the vehicle.