Reading And Writing Values
- 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 additions 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.
- Check the chassis number and press [F12] to start.
- Select the required control unit TV tuner in the overview and press [F12] to continue.
- Select Maintenance/repairs .
- Select Write values and press [F12] to continue.
- Switch off ignition.
Information
If a new TV tuner is installed, there must be no signals at the optical waveguide connector (disconnected optical waveguide connector does not light up).
Given this, the battery must be disconnected before installing a new TV tuner.
- Disconnect the battery. → 2X00IN WORK INSTRUCTIONS AFTER DISCONNECTING THE BATTERY .
- Replace the control unit. → 911719 REMOVING AND INSTALLING TV TUNER .
- Connect the battery.
- 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.
- Carry out a function test on the TV tuner.