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Home >> Porsche >> 2017 >> Macan Base >> Repair and Diagnosis >> External Pages >> Different car >> Section 105 (94 - Lights, Lamps, Switches, Exterior -- PANAMERA (970)) >> WM 945755 Replacing Control Unit For Gas Discharge (Except PANAMERA S Executive, PANAMERA Turbo Executive, PANAMERA GTS) >> Replacing Control Unit For Gas-Discharge Headlight

Replacing Control Unit For Gas-Discharge Headlight

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2016 Porsche Panamera, 2015 Porsche Panamera, 2014 Porsche Panamera, 2013 Porsche Panamera, and 2012 Porsche Panamera. However, it is still accessible from the selected car via links, so may be relevant.
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. The diagnostic application starts.
  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. Select 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 control unit. → Removing Gas-Discharge Control Unit 
  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. [F11], select HBA calibration  and press [F12].
  13. Follow the instructions on the Tester and press [F12].

    Information 

    Information 

    Even if only one gas discharge lamp control unit is being replaced, it is necessary to teach both control units via the control unit replacement  function.

    • This ensures that the left and right gas discharge lamp (headlight) control units have the same, required, software version. 
  14. Perform a function test. Switch on light, range adjustment motor adjusts up and down.
  15. Read out the fault memory and erase it if necessary.
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