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Home >> Porsche >> 2014 >> Boxster Base, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 269 (94 - Lights, Lamps, Switches, Exterior -- 911 CARRERA (991)) >> WM 949855 Replacing Control Unit For Automatic Headlight Levelling System (Except CARRERA "Edition", CARRERA Cabriolet "Edition", CARRERA 4 "Edition", CARRERA 4 Cabriolet "Edition", Gt3) >> Teaching Control Unit For Automatic Headlight Levelling System

Teaching Control Unit For Automatic Headlight Levelling System

WARNING: This page does not describe the selected car, but rather 8 other vehicles, including the 2019 Porsche 911, 2018 Porsche 911, 2017 Porsche 911, 2016 Porsche 911, and 2015 Porsche 911. However, it is still accessible from the selected car via links, so may be relevant.

Information 

If automatic coding is not possible, manual coding is to be carried out in accordance with vehicle equipment.

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  .

  1. Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on ignition.
  2. Select the vehicle type and start the PIDT.
  3. Select the corresponding control unit for left/right headlight  in the overview  .
  4. Select Maintenance/repairs  .
  5. Select Control unit replacement  and press [F12].
  6. Read data  and press [F12].
  7. Press [F8] to start reading out data.
  8. Check the chassis number and press [F12].
  9. Switch off ignition and replace the control unit. → 949819 REMOVING AND INSTALLING CONTROL UNIT FOR AUTOMATIC HEADLIGHT LEVELLING SYSTEM 
  10. Switch on ignition. Select the Write data  menu (procedure described above), press [F12] and then press [F8] to start installing the data that was read out.
  11. The System Tester displays the message Data has been written  . Press [F12] to continue.
  12. Read out the fault memory  and erase it if necessary.
  13. In the Coding/adaptation  menu, select Automatic coding  and press [F12].
  14. Read out the fault memory  and erase it if necessary.
  15. Perform a function test. Switch on light, range adjustment motor adjusts up and down.
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