Q7 Quattro V6-3.6L (BHK) (2007)
‹› By pre-bleeding the cooling circuit, bleeding of the cooling system after installation is greatly simplified on first starting in operation => [ Cooling
Circuit, Bleeding ] See: Service and Repair/Procedures/Cooling Circuit, Bleeding.
‹› Bleed cooling circuit => [ Cooling Circuit, Bleeding ] See: Service and Repair/Procedures/Cooling Circuit, Bleeding
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Wait until coolant exits from coolant hose connection - B - on coolant pipe to heater core.
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Connect coolant hose - B - at coolant pipe to heater core.
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Except for the cover under left side instrument panel, re-install the remaining removed components in reverse order.
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Evacuate refrigerant circuit and recharge again.
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Check coolant circuit for leaks, pay particular attention between coolant hoses and heater core.
‹› Check seal of coolant circuit after charging e.g. as follows: Open cap on coolant expansion tank (observe safety precautions when opening cap)
and then increase pressure in cooling circuit e.g. using hand pump from cooling system tester (V.A.G 1274/).
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Bleed cooling circuit => [ Cooling Circuit, Bleeding ] See: Service and Repair/Procedures/Cooling Circuit, Bleeding.
‹› When bleeding coolant circuit, take extreme care that heater core is bled completely. If there are still air bubbles in the heater core, it may cause
the customer to complain of insufficient heating performance in winter or different air temperature from vents at same setting in regulated mode
=> [ Heating Performance of HVAC System and Function of Coolant Pump, Checking ] See: Testing and Inspection/Component Tests and
General Diagnostics/Heating Performance of HVAC System and Function of Coolant Pump, Checking
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Re-install the lower left instrument panel lining.
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Check DTC memory of front A/C control head Climatronic Control Module (J255) and of Rear A/C Control Head (Climatronic) (E265) and erase
DTCs displayed if necessary.
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Perform basic setting and output Diagnostic Test Mode (DTM) on the A/C system.
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Check function of A/C system if necessary.