Connection Diagram - Coolant Hoses

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2017 Audi SQ5, 2017 Audi Q5, 2016 Audi SQ5, 2016 Audi Q5, and 2015 Audi SQ5. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Blue = large coolant circuit.

Red = small coolant circuit.

Orange = coolant circuit for the charge air cooler.

Brown = heating circuit.

The arrows show the coolant flow direction.

Vehicles without Auxiliary Heater

Fig 1: Connection Diagram - Coolant Hoses Without Parking Heater Components Locations

Courtesy of AUDI OF AMERICA, LLC

Front Charge Air Cooling Circuit Radiator
- Change the coolant after replacing
Radiator
- with ATF cooler
- Change the coolant after replacing
Engine Coolant Temperature Sensor -G62-
Coolant Thermostat
Coolant Pump
Right Charge Air Cooler
- Inside the compressor housing
- Change the coolant after replacing
Bleed Screw
Cylinder Head
- Cylinder bank 1 (right)
- Change the coolant after replacing
Bleed Screw
Heater Core for Heater
- Removing and installing, refer to HEATER CORE, REMOVING AND INSTALLING .
- Change the coolant after replacing
Coolant Recirculation Pump -V50-
Engine Temperature Control Sensor -G694-
Cylinder Head
- Cylinder bank 2 (left)
- Change the coolant after replacing
Bleed Screw
Left Charge Air Cooler
- Inside the compressor housing
- Change the coolant after replacing
Cap
- Checking the pressure relief valve, refer to PRESSURE RELIEF VALVE IN CAP, CHECKING (See Figure).
Coolant Expansion Tank
Engine Oil Cooler
- Change the coolant after replacing
Check Valve
- Inside the coolant hose
Check Valve
- Inside the coolant hose
Check Valve
- Inside the coolant hose
Left Charge Air Cooling Circuit Radiator
- Equipment levels
- Change the coolant after replacing
Charge Air Cooling Pump -V188-

Vehicles with Parking Heater

Fig 2: A5 From MY 2012, A4 From MY 2013 With Parking Heater Components Location

Courtesy of AUDI OF AMERICA, LLC

Front Charge Air Cooling Circuit Radiator
- Change the coolant after replacing
Radiator
- With ATF cooler
- Change the coolant after replacing
Engine Coolant Temperature Sensor -G62-
Coolant Thermostat
Parking Heater
- With Recirculation Pump -V55-
- Removing and installing, refer to AUXILIARY HEATER HEATING ELEMENT -Z35-, REMOVING AND INSTALLING .
Coolant Pump
Right Charge Air Cooler
- Inside the compressor housing
- Change the coolant after replacing
Bleed Screw
Cylinder Head
- Cylinder bank 1 (right)
- Change the coolant after replacing
Heater Coolant Shut-Off Valve -N279-
- Removing and Installing, refer to AUXILIARY HEATER HEATING ELEMENT -Z35-, REMOVING AND INSTALLING .
Bleed Screw
Heater Core for Heater
- Removing and installing, refer to HEATER CORE, REMOVING AND INSTALLING .
- Change the coolant after replacing
Engine Temperature Control Sensor -G694-
Cylinder Head
- Cylinder bank 2 (left)
- Change the coolant after replacing
Bleed Screw
Left Charge Air Cooler
- Inside the compressor housing
- Change the coolant after replacing
Cap
- Checking the pressure relief valve, refer to PRESSURE RELIEF VALVE IN CAP, CHECKING (See Figure).
Coolant Expansion Tank
Engine Oil Cooler
- Change the coolant after replacing
Check Valve
- Inside the coolant hose
Check Valve
- Inside the coolant hose
Check Valve
- Inside the coolant hose
Left Charge Air Cooling Circuit Radiator
- Equipment levels
- Change the coolant after replacing
Charge Air Cooling Pump -V188-