Front Expansion Valve, Removing And Installing: Installing
Install in reverse order of removal and note the following:
-- Check the support ring -D- for proper installation position and check the grommet in the plenum chamber rear panel for damage and proper installation.
-- Clean the connecting tubes -B- and -C- from the evaporator and check for damage.
-- Check the baseplate -A- for correct seating on the connecting tubes -B- and -C- to check the evaporator.
-- Replace the O-rings -D- and -E- and check that it is positioned correctly in the groove from the connecting tubes -B- and -C-. Refer to the Parts Information for the correct version.
-- Coat the O-ring seals lightly with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS .
-- Clean the connections on the expansion valve -A- and check for damage.
-- Install the -G-.
-- Thoroughly clean all connections in expansion valve -D- and at refrigerant lines -B- and -C- and check for damage.
-- Replace all O-rings and coat them with refrigerant oil before installing. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information for the correct version.
-- Make sure the O-ring seals fit properly inside the grooves in the connections of refrigerant lines -B- and -C-.
-- Install the nut -A- for the refrigerant lines -B- and -C-.
-- Check the routing of the refrigerant lines after attachment. They must be inserted in the provided brackets in a tension-free manner and must not come in contact with other components.
-- Evacuate and charge the refrigerant circuit. Refer to Refrigerant Circuit (R134a) or Working with A/C Service Station (R1234ya) (1 of 2) or Working with A/C Service Station (R1234yf) (2 of 2) .
-- Install the remaining removed components.
-- Switch the ignition on.
-- On vehicles with a high-voltage system (Audi Q7 e-tron), initiate the basic setting of the A/C system through the Thermal Management Control Module -J1024- and activate the power-controlled valves using one of the routines stored there. "Charge/flush the refrigerant circuit stop routine" using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.
-- Check the DTC memory for the Front A/C Display Control Head -E87- and, if necessary, delete any displayed errors using the Vehicle Diagnostic Tester in the "Guided Fault Finding" function.
-- Start the A/C system after charging the refrigerant circuit. Refer to A/C SYSTEM, STARTING AFTER CHARGING REFRIGERANT CIRCUIT .