Reading And Writing Values
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 .
- Connect the PIWIS Tester to the vehicle and start the Tester. Switch on ignition.
- Select the vehicle type and start the diagnostic application.
- Select the ParkAssist control unit in the overview .
- Select Maintenance/repairs .
- Select Control unit replacement and press [F12].
- Select Read data and press [F12].
- Press [F8] to start reading out data.
- Check the chassis number and press [F12].
- Switch off ignition and replace control unit. → 917419 REMOVING AND INSTALLING CONTROL UNIT FOR PARKASSIST .
- 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.
- The Tester displays the message Data has been written . Press [F12] to continue.
- Read out the fault memory and erase it if necessary.
- Function test: maneuver the vehicle.