Heat Pump Valve Unit, Removing And Installing: Removing
- For all the following work, close the open lines and connections with clean plugs from the Engine Bung Set:VAS6122 .
-- Initiate the A/C system basic setting through the Thermal Management Control Module -J1024- and open the power-activated valves through the stored routine "Extract, evacuate and fill the refrigerant circuit" using the Vehicle Diagnostic Tester.
-- Switch off the ignition.
-- Discharge the refrigerant circuit. Refer to Refrigerant Circuit or Working with A/C Service Station .
-- Remove the left front wheel. Refer to WHEELS AND TIRES .
-- Remove the wheel housing liner and left front wheel spoiler. Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .
-- Remove the nuts -3 and 5-.
-- Remove the bolt -2- from above.
-- Remove the bolts -7-.
-- Disengage the coolant hose from the clip -1-.
-- Remove the bracket -6- for the valve unit -4-.
-- Remove the upper bolts -2- from the valve unit.
-- Remove the lower bolts -2- from the valve unit.
Danger or frostbite due to refrigerant coming out under pressure.
Frostbite on the skin and other parts of the body is possible.
- Wear safety gloves.
- Wear protective eyewear.
- Evacuate or drain refrigerant and open the refrigerant circuit immediately.
- If more than 10 minutes elapse after extracting or draining the refrigerant and the refrigerant circuit was not opened, extract or drain the refrigerant again. Pressure develops in the refrigerant circuit due to evaporation.
-- Remove the bolts -3 and 5- on the check valve.
-- Loosen the refrigerant line -4-.
-- Remove the bolt -3- for the refrigerant line from the valve unit to the heat exchanger for the heat pump operation.
-- Remove the bolt -2- for the refrigerant line to the check valve.
-- Remove the bolt -1- for the refrigerant line to the condenser.
-- Remove the refrigerant lines -5- from the connections.
-- Disconnect the connectors -1-.
-- Pre-tighten the valve unit slightly and disconnect the rear connectors -3-.
-- Remove the valve unit.