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Home >> Audi >> 2011 >> Q5 3.2 >> Repair and Diagnosis >> Heating, Ventilation & A/C (HVAC) >> HVAC Control Systems >> Heating, Ventilation & Air Conditioning (1 Of 2) (As Of 06.2014) >> 87 Air Conditioning >> Overview - A/C System >> Overview - Components Outside Of Passenger Compartment >> Component Group "3"

Component Group "3"

Fig 1: Overview Of Components Outside of Passenger Compartment (Component Group "3")
GWWA87-10637Courtesy of AUDI OF AMERICA, LLC
  1. Coolant Recirculation Pump -V50- (Water Pump -V36-)
    • Component location for example on 6-Cylinder FSI vehicles. Refer to Coolant Recirculation Pump -V50- (Water Pump -V36-), LOCATION, ACTIVATION AND FUNCTION, VEHICLES WITH 6-CYLINDER GASOLINE ENGINE .
      NOTE:

      The Coolant Recirculation Pump -V50- (Water Pump -V36-) is only installed on vehicles without a "parking heater". Refer to Coolant Recirculation Pump -V50- (Water Pump -V36-), LOCATION, ACTIVATION AND FUNCTION, VEHICLES WITH 6-CYLINDER GASOLINE ENGINE .

      For vehicles with a 6-Cylinder TFSI engine, may also have a Coolant Recirculation Pump -V50- (Water Pump -V36-) installed in this location, depending on the vehicle version. Refer to COOLANT PUMP/THERMOSTAT for CALB, COOLANT PUMP/THERMOSTAT for CPNB, or COOLANT PUMP/THERMOSTAT for CTUC and CTUD .

      For vehicles with a "parking heater", the Recirculation Pump -V55- assumes the function of the Coolant Recirculation Pump -V50- (the Water Pump -V36-).

      Depending on the version of the Climatronic Control Module -J255- A/C display and control head, the Coolant Recirculation Pump -V50- may be referred to as Water Pump -V36- in Guided Fault Finding. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding  " function.

      Currently, on vehicles with an 8-Cylinder FSI engine, there is no Coolant Recirculation Pump -V50- (introduction still open) .

      The Coolant Recirculation Pump -V50- (Water Pump -V36-) version and activation differ depending on the vehicle version and production period. From MY 2012 as a running change, the pumps installed from the start of production, which were activated via a 500 Hertz signal (500 pulses per second), are being replaced by pumps that are activated by a variable (100 to 500 Hertz) signal depending on the engine. Pumps that are activated by a variable signal are also equipped with a diagnostic function and are activated mostly via the respective engine control module. Therefore, ensure the correct allocation (only the allocated pump can be activated). Use the Vehicle Diagnostic Tester in the "Guided Fault Finding  " function, refer to the appropriate SYSTEM WIRING DIAGRAM .

      The Coolant Recirculation Pump -V50- can be installed in different locations. For vehicles with a 6-Cylinder engine, the Coolant Recirculation Pump -V50- can be installed, for example, on the longitudinal member as illustrated or it is assembled between the plenum chamber bulkhead and the engine. Refer to COOLANT PUMP/THERMOSTAT for CALB, COOLANT PUMP/THERMOSTAT for CPNB, or COOLANT PUMP/THERMOSTAT for CTUC and CTUD .

  2. Coolant Recirculation Pump -V50- (Water Pump -V36-)
    • Installed position for example by vehicles with 4-Cylinder engines and specific vehicles with a 6-Cylinder engine. Refer to Coolant Recirculation Pump -V50- (Water Pump -V36-), LOCATION, ACTIVATION AND FUNCTION, VEHICLES WITH 4- OR 6-CYLINDER ENGINE .
      NOTE:

      The Coolant Recirculation Pump -V50- (Water Pump -V36-) is only installed on vehicles from MY 2010 with the "Start/Stop System" but without a "parking heater". Refer to Coolant Recirculation Pump -V50- (Water Pump -V36-), LOCATION, ACTIVATION AND FUNCTION, VEHICLES WITH 4- OR 6-CYLINDER ENGINE .

      Vehicles with the "Start/Stop System" and a "parking heater" do not have a Coolant Recirculation Pump -V50- (Water Pump -V36-). For these vehicles, the Recirculation Pump -V55- assumes the function of the Coolant Recirculation Pump -V50- (the Water Pump -V36-).

      Depending on the version of the Climatronic Control Module -J255- A/C display and control head, the Coolant Recirculation Pump -V50- may be referred to as Water Pump -V36- in Guided Fault Finding. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding  " function.

      The Coolant Recirculation Pump -V50- (Water Pump -V36-) version and activation differ depending on the vehicle version and production period. From MY 2012 as a running change, the pumps installed from the start of production, which were activated via a 500 Hertz signal (500 pulses per second), are being replaced by pumps that are activated by a variable (100 to 500 Hertz) signal depending on the engine. Pumps that are activated by a variable signal are also equipped with a diagnostic function and are activated mostly via the respective engine control module. Therefore, ensure the correct allocation (only the allocated pump can be activated). Use the Vehicle Diagnostic Tester in the "Guided Fault Finding  " function, refer to the appropriate SYSTEM WIRING DIAGRAM .

      The Coolant Recirculation Pump -V50- can be installed in different locations. For most vehicles with a 4-Cylinder engine and for certain vehicles with a 6-Cylinder engine, it is located between the plenum chamber bulkhead and the engine.

      The activation of the Coolant Recirculation Pump -V50- varies. If the vehicle has a high voltage system (hybrid vehicles), then the Climatronic Control Module -J255- requests the activation via the respective engine control module. Use the Vehicle Diagnostic Tester in the "Guided Fault Finding  " function and refer to the appropriate SYSTEM WIRING DIAGRAM.

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