278555 Replacing control unit for distance measuring sensor

WM 278555 Replacing control unit for distance measuring sensor

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.

1. Connect the Porsche System Tester to the vehicle and start the System Tester. Switch on ignition and press F12 to continue.
2. Select the vehicle type and start the PIDT.
3. Select the Adaptive cruise control control unit 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 control unit. -> 278519 Removing and installing control unit for distance measuring sensor 278519 Removing and installing control unit for distance measuring sensor
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 fault memory and erase it if necessary.

Subsequent work

If the control unit for the distance measuring sensor was removed and installed or replaced, the control unit for the distance measuring sensor will need to be readjusted on a measuring platform using adjustment tool VAS 6430. -> 278515 Adjusting control unit for distance measuring sensor 278515 Adjusting control unit for distance measuring sensor.