Power Trunk / Liftgate Control Module: Service and Repair
WM 556819 Removing and installing control unit for rear lid
Tools
Preliminary work
1. Remove side trim panel for rear luggage compartment. -> 700319 Removing and installing side trim panel for rear luggage compartment - section on "Removing" 700319 Removing and installing rear luggage compartment side-trim panel
Information
Only for vehicles with additional air conditioning.
2. Loosen additional air conditioning unit and swivel it to one side with the lines connected. -> 881019 Removing and installing additional air conditioning - section on "Removing" Service and Repair
Removing control unit for rear lid
Installation position of control unit for rear lid
CAUTION
Risk of short circuit.
-> Before removing the control unit, switch off the ignition.
Information
- Only for vehicles without auxiliary air conditioner.
Unscrew fastening screws -1- and remove package box -2- ( -arrow- ).
Removing package box
1. Release the two clips -2- ( -arrows A- ) and take control unit for rear lid -1- out of the holder -arrow B-.
Removing control unit for rear lid
2. Release connector -arrow A- and pull it off the control unit for rear lid -arrow B-.
Pulling connector off control unit for rear lid
Installing control unit for rear lid
1. Plug in connector on control unit for rear lid -arrow- until the connector engages securely.
Plugging in connector on control unit for rear lid
2. Fit control unit for rear lid -1- into the holder from below and press it in -arrow A- until the two clips -2- engage securely -arrows B-.
Installing control unit for rear lid
Information
- Only for vehicles without auxiliary air conditioner.
Position package box -2- on the body -arrow- and secure with the fastening screws -1-.
Installing package box
Subsequent work
Information
Only for vehicles with additional air conditioning.
1. Secure additional air conditioning unit. -> 881019 Removing and installing additional air conditioning - section on "Installing" Service and Repair
2. Install side trim panel for rear luggage compartment. -> 700319 Removing and installing side trim panel for rear luggage compartment - section on "Installing" 700319 Removing and installing rear luggage compartment side-trim panel
Coding control unit for rear lid
Information
- If the control unit is replaced, the control unit must be coded using the PIWIS Tester 9718. This adapts the control unit to the vehicle and equipment.
- Before the control unit is removed and replaced, a read-out of the vehicle data should be obtained (if possible) using the PIWIS Tester 9718.
- During coding, it is essential to guarantee the power supply for the PIWIS Tester 9718. A battery charger with a current rating of at least 40 A must be connected to the vehicle battery.
- The PIWIS Tester 9718 instructions take precedence, and in the event of a discrepancy these are the instructions that must be followed. Deviations may occur with later software versions. The description is based on the Tester software release 17.02.
- The procedure described here has been structured in general terms; different text or additions may appear in the PIWIS Tester 9718.
1. PIWIS Tester 9718 must be connected to the vehicle before starting it. Switch on the ignition. >> to continue.
2. Select vehicle type and continue with >>.
3. The rear lid is open.
4. Select the rear lid control unit and confirm this by pressing >>.
5. Control unit replacement must then be selected. Press >> to continue.
Information
If the values cannot be read out from the rear lid control unit, skip the step for reading and writing values and continue with coding.
6. Select Read-out values and continue with >>.
7. The PIWIS Tester 9718 screen displays the message "Coding read-out complete". Press >> to continue.
8. Switch off ignition and replace the rear lid control unit.
9. Switch on ignition. Once the control unit has been replaced, the values that were read out are loaded when the Write values menu is selected. Press >> to continue.
Information
The vehicle must be level and standing on all four wheels before coding the control unit.
For your information: The position of the vehicle affects the tilt sensor.
10. Select the Coding menu and press >>. Then compare the coding using the specified coding table. If necessary, press F8 to change the required coding to the listed values.
Information
The specified coding sequence must be followed as the basic coding sets the coding for Bratislava commissioning to the value one , which is not permitted for the workshop.
11. Close the rear lid using the control switch on the rear lid.
Installation position of switch for rear lid
12. Open the rear lid using the outer rear lid button. The rear lid now opens fully and a warning tone is issued.
13. Use your hand to position rear lid to the opening angle requested by the customer and press the rear lid control switch for a few seconds until you hear a warning tone.
14. Close the rear lid again using the control switch and then open it again using the outer rear lid button. Check the opening angle. If the opening angle is OK, the rear lid has now been taught fully.
15. Read out the fault memory in the Rear lid menu and erase the fault memory if necessary. Check the function of the rear lid again after you have erased the fault entry and then read out the fault memory again.