Removing and Installing Control Unit For Off-Road Stabilizer

Removing and installing control unit for off-road stabilizer
Tools





Preliminary work

Lift the vehicle.

Removing control unit for off-road stabilizer











WARNING: The Off-road Stabilizer System (ORS) operates at an overpressure of up to 165 bar. If the ORS is not depressurized, movements may occur on the wheel carrier under certain circumstances (e.g. the off-road stabilizers are disengaged when the vehicle is lifted, the switch on the centre console is pressed and the wheel carrier is also lifted).
^ The stabilizer can close quickly. Thus there is the danger of crushing in the area of the stabilizers and wheel carriers. Danger of injury and material damage if the wheel carrier is raised incorrectly.
-> Before working on the vehicle, ensure that the ORS is engaged. The indicator light on the centre console button must be OFF . If the indicator light is on, follow the following procedure: Switch on the ignition and engage the road driving program >> High Range <<. The stabilizers must audibly engage.
-> Before working on the ORS, depressurize the system. To do this, close the Porsche System Tester and select in the menu >> Off-road Stabi (ORS) >> Drive links >> clock valve VA or valve HA <<. The valve clocks (audibly) until the procedure is finished.
-> Do not raise the wheel suspension higher than the normal vehicle position (vehicle resting on wheels). When raising the suspension, use a suitable intermediate layer (hard rubber) .
-> Do not damage the brake cover plate.

1. Connect the Porsche System Tester and depressurize the system. To do this, select the menu items >> Off-road Stabilizer (ORS) >> Drive links >> Set front-axle or rear-axle valve <<. The valve clocks (audibly) until the procedure is finished.
2. Open the luggage-compartment lid and remove the rear left side-panel lining.





3. If the vehicle has a four-zone air-conditioning system, loosen the fastening screws -4- omit.





4. Place the four-zone air-conditioning system -> see figure aside without opening the circuit.





5. Remove the cover -arrow- of the oil dipstick.





6. Remove the 2 fastening screws -arrow-.





7. Pull the oil dipstick along with the filler tube and vent tube -arrow out of the expansion tank. Press the relevant plastic ring on the fluid tank down evenly using the removal tool, universal NR.21.
8. The hydraulic lines are fed out through the luggage compartment floor panel. Loosen the lines from outside and ensure when removing the lines that the seals are not lost when passed through the body. If fluid emerges, place a lint-free cloth, for example, underneath. Clean the luggage compartment floor panel IMMEDIATELY if necessary.
9. Disconnect electric plugs.





10. Remove the three fastening screws on the control unit -arrows and take out the control unit.

Installing control unit for off-road stabilizer


Note:
^ Bleed the off-road stabilizer system (ORS).
^ Visually inspect all parts.
^ Replace self-locking nuts.
^ Observe correct tightening torques.

1. Insert the control unit.
2. Guide the hydraulic lines of the control unit carefully through the body and secure into position. Fit seals.





3. Fit the control unit into the take-up points provided -arrows-.





4. Insert filler neck with filler tube and vent tube and slide in as far as the wide section -arrow-. Insert oil dipstick.
5. Push on electric plugs.
To ensure that there are no leaks in the system, fill and bleed the off-road stabilizer system (ORS) before installing the four-zone air-conditioning system. Then perform a visual check for leaks on the control unit (expansion tank, sensor connections, etc.).





6. The off-road stabilizer system is filled with Pentosin CHF 11S using the dipstick opening -> see figure ->407707 Bleeding the Off-Road Stabilizer System (ORS)'.





7. Bleed the off-road stabilizer system (ORS). Bleeding the Off-Road Stabilizer System (ORS) - section on Bleeding.' The fluid level can be checked by reading the marking on the dipstick -> see figure.





8. Do not top up above the max. marking -> see figure. Fit the cover of the oil dipstick.





9. Insert and fit the four-zone air-conditioning system -arrow-.

Subsequent work

Fit left rear side trim panel.