Connection Diagram - Coolant Hoses

Vehicles without Auxiliary Heater

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

Courtesy of AUDI OF AMERICA, LLC

1. Front Charge Air Cooling Circuit Radiator
   • Change the coolant after replacing
2. Radiator
   • with ATF cooler
   • Change the coolant after replacing
3. Engine Coolant Temperature Sensor -G62-
4. Coolant Thermostat
5. Coolant Pump
6. Right Charge Air Cooler
   • Inside the compressor housing
   • Change the coolant after replacing
7. Bleed Screw
8. Cylinder Head
   • Cylinder bank 1 (right)
   • Change the coolant after replacing
9. Bleed Screw
10. Heater Core for Heater
    • Removing and installing, refer to HEATER CORE, REMOVING AND INSTALLING .
    • Change the coolant after replacing
11. Coolant Recirculation Pump -V50-
12. Engine Temperature Control Sensor -G694-
13. Cylinder Head
    • Cylinder bank 2 (left)
    • Change the coolant after replacing
14. Bleed Screw
15. Left Charge Air Cooler
    • Inside the compressor housing
    • Change the coolant after replacing
16. Cap
    • Checking the pressure relief valve, refer to PRESSURE RELIEF VALVE IN CAP, CHECKING  (See Figure).
17. Coolant Expansion Tank
18. Engine Oil Cooler
    • Change the coolant after replacing
19. Check Valve
    • Inside the coolant hose
20. Check Valve
    • Inside the coolant hose
21. Check Valve
    • Inside the coolant hose
22. Left Charge Air Cooling Circuit Radiator
    • Equipment levels
    • Change the coolant after replacing
23. 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

1. Front Charge Air Cooling Circuit Radiator
   • Change the coolant after replacing
2. Radiator
   • With ATF cooler
   • Change the coolant after replacing
3. Engine Coolant Temperature Sensor -G62-
4. Coolant Thermostat
5. Parking Heater
   • With Recirculation Pump -V55-
   • Removing and installing, refer to AUXILIARY HEATER HEATING ELEMENT -Z35-, REMOVING AND INSTALLING .
6. Coolant Pump
7. Right Charge Air Cooler
   • Inside the compressor housing
   • Change the coolant after replacing
8. Bleed Screw
9. Cylinder Head
   • Cylinder bank 1 (right)
   • Change the coolant after replacing
10. Heater Coolant Shut-Off Valve -N279-
    • Removing and Installing, refer to AUXILIARY HEATER HEATING ELEMENT -Z35-, REMOVING AND INSTALLING .
11. Bleed Screw
12. Heater Core for Heater
    • Removing and installing, refer to HEATER CORE, REMOVING AND INSTALLING .
    • Change the coolant after replacing
13. Engine Temperature Control Sensor -G694-
14. Cylinder Head
    • Cylinder bank 2 (left)
    • Change the coolant after replacing
15. Bleed Screw
16. Left Charge Air Cooler
    • Inside the compressor housing
    • Change the coolant after replacing
17. Cap
    • Checking the pressure relief valve, refer to PRESSURE RELIEF VALVE IN CAP, CHECKING  (See Figure).
18. Coolant Expansion Tank
19. Engine Oil Cooler
    • Change the coolant after replacing
20. Check Valve
    • Inside the coolant hose
21. Check Valve
    • Inside the coolant hose
22. Check Valve
    • Inside the coolant hose
23. Left Charge Air Cooling Circuit Radiator
    • Equipment levels
    • Change the coolant after replacing
24. Charge Air Cooling Pump -V188-