945755 Replacing control unit for gas discharge
WM 945755 Replacing control unit for gas discharge
Tools
Technical values
Reading and writing values
NOTICE
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 the ignition and remove the 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. 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. -> 945719 Removing and installing control unit for gas discharge 945719 Removing and installing control unit for gas-discharge headlight
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.
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.