Plenum Chamber Refrigerant Line Pass-Through, Removing And Installing: Removing
Vehicles with high-voltage system (Audi Q7 e-tron)
-- Switch off (deactivate) the "parking air conditioner". Refer to Owner's Manual.
-- 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 in the "Guided Fault Finding" function.
Continuation for All Vehicles
-- Switch off the ignition.
-- Discharge 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) .
-- Remove the left front wheel housing liner. Refer to OVERVIEW - FRONT WHEEL HOUSING LINER .
-- Remove the windshield wiper motor. Refer to WINDSHIELD WIPER MOTOR -V-, REMOVING AND INSTALLING .
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 -A-.
-- Loosen the refrigerant lines to the expansion valve -C and D- from the bracket -B- and the pass-through -E-.
For vehicles with a second evaporator (a rear heater and A/C unit)
-- Remove the bolt -A-.
-- Loosen the refrigerant lines to the second evaporator -C and D- from the line connection -B- to the pass-through -E-.
Continuation for All Vehicles
-- Remove the bolt -A-.
-- Loosen the inner heat exchanger -C- from the bracket -B- and the pass-through -D-.
-- Loosen the pass-through -A- or -B- (different versions) from the opening in the body, to so do press the catches.