Replacing Rear Lid Control Unit
NOTIFICATION
Voltage drop
- Irreparable damage to control unit
- Damage to control unit
- Fault entries in the control unit
- Control unit programming/coding is aborted
- Malfunctions in the control unit, even during programming
→ Switch off ignition before disconnecting the control unit.
→ Make sure that the power supply is not interrupted during programming/coding.
→ Connect the battery charger with at least > current 90 A ↓ to the vehicle battery.
Information
Ensure the consistency of a combination of hardware and software versions
After performing software updates, always make sure that the target software versions are also actually installed on the control units and that the system is therefore ensured.
This also applies in the case of hardware replacement.
See TI 9X00 Information on the software system for various control units in the vehicle (112/21)
Information
The PIWIS Tester 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 on the PIWIS Tester .
- Connect the Tester to the vehicle and start it. Switch on ignition.
- Select the vehicle type if necessary.
- Select the rear lid control unit in the Overview . Press F12 to continue. The message "Create Vehicle Analysis Log (VAL)?" appears. Press F11 to continue.
- Select Coding/programming .
- Select Automatic coding
. Press F12 to continue.
The tester displays the message: Coding successfully performed.
- Select Drive links checks
.CAUTION: When you start the calibration/teaching process, the tailgate moves to its limit stops. Mechanical force limitation is not guaranteed during this process.
- Danger of pinching and squashing body parts.
- Incorrect values for the control unit, resulting in malfunctions.
→ Take precautions to ensure that no body parts and objects can get caught in the tailgate. - Select Tailgate calibration
. Press F12 to continue.
Follow the instructions on the Tester. Press F12 to continue and then press F8 to start.
Open the tailgate using the outer button on the tailgate.
Follow instructions on Tester. Press F12 to continue.
Close the tailgate using the inner button on the tailgate.
If the vehicle is equipped with the optional Kessy system, use the close button. Do not use the close and lock button.
The tester displays the message: Calibration was completed successfully.
- Go back to the Overview .
- Read out all fault memories , process and delete existing faults if necessary.
- Exit the diagnostic application. Switch off ignition. Disconnect the Tester.
- Carry out a function test.