A8 Quattro Sedan V8-4.2L (BGK) (2006)
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‹› Supply from engine to pump valve unit - A -
‹› Return from pump valve unit to engine - B -
‹› Supply to front passenger's heater core - C -
‹› Return from front passenger's heater core - D -
‹› Supply to driver's heater core - E -
‹› Return from driver's heater core - F -
‹› For removal, hex nuts at bracket - G - must also be removed on these vehicles.
Installing
Installation is carried out in the reverse order, when doing this note the following:
‹› Coolant Pump (V50) of pump-valve unit must only be operated after coolant circuit has been vented.
‹› Dry running of pump in pump valve unit leads to destruction.
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Connect 2-pin harness connector - C - to pump only after bleeding coolant circuit.
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After installation, check grommet between engine compartment and plenum chamber for proper seating.
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Check the DTC memory for the Climatronic Control Module (J255) A/C control head and erase any faults displayed if necessary => Vehicle
diagnosis, testing and information system VAS 5051 in the "Guided Fault Finding" function.
