After-Run Coolant Pump, Coolant Shut-Off Valve, Air Quality Sensor, Rear Window Defogger

Courtesy of AUDI OF AMERICA, LLC

1. Outside Air Temperature Sensor -G17-
   • Check using the Vehicle Diagnostic Tester in the "Guided Fault Finding"  function (for the Climatronic Control Module -J255- and the Vehicle Electrical System Control Module -J519-). Refer to the appropriate Wiring Diagram.
     NOTE:

     The Vehicle Electrical System Control Module -J519- evaluates the measured value for the Outside Air Temperature Sensor -G17-.

   • Removing and Installing. Refer to Outside Air Temperature Sensor -G17-, REMOVING AND INSTALLING .
2. After-Run Coolant Pump -V51-
   • Shown on a 2.0L TFSI engine with bracket
   • Installed in the coolant circuit depending on the engine version. Refer to COOLANT SYSTEM/COOLANT [DAZA] / COOLANT SYSTEM/COOLANT [CNTC, CYFB] (Connection Diagram for Coolant Hoses) and the appropriate Wiring Diagram.
   • Activated by the engine control module at the request of the Climatronic Control Module -J255-
   • Also serves as support for the engine coolant pump to improve the coolant flow rate through the heater core for the heater to increase the heating output at certain engine speeds.
   • Removing and Installing. Refer to COOLANT PUMP/COOLANT THERMOSTAT [DAZA] / COOLANT PUMP/COOLANT THERMOSTAT [CNTC, CYFB] (Overview - Electrical Coolant Pump).
3. Fresh Air Intake
   • Removing and Installing. Refer to FRESH AIR INTAKE, REMOVING AND INSTALLING .
     NOTE:

     Depending on the vehicle version, a dust filter may also be installed instead of an intake grille (introduction not yet finalized).

4. Air Quality Sensor -G238- with Humidity Sensor In Fresh Air Intake Duct -G657-
   • Only on vehicles with an automatic climate control system
   • Check using the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function (for the Climatronic Control Module -J255- and the Vehicle Electrical System Control Module -J519-). Refer to the appropriate Wiring Diagram.
   • Removing and Installing. Refer to Air Quality Sensor -G238- /Humidity Sensor In Fresh Air Intake Duct -G657-, REMOVING AND INSTALLING .
5. Rear Window Defogger -Z1-
   • Information on function and activation of the rear window defogger. Refer to DISPLAY CONTROL HEAD and Owner's Manual.
   • Check the activation and function of the rear window defogger using the Vehicle Diagnostic Tester in the"Guided Fault Finding"  function (for the Climatronic Control Module -J255- and the Vehicle Electrical System Control Module -J519-). Refer to the appropriate Wiring Diagram.
6. Coolant Shut-Off Valve -N82-
   • Shown on a 2.0L TFSI engine
   • Installed in the coolant circuit depending on the engine version. Refer to COOLANT SYSTEM/COOLANT [DAZA] / COOLANT SYSTEM/COOLANT [CNTC, CYFB] (Connection Diagram for Coolant Hoses) and the appropriate Wiring Diagram.
   • Activated by the engine control module after approval from Climatronic Control Module -J255-
   • Depending on the setting on the A/C system control head, it blocks the coolant flow through the heater core for the heater when the engine is cold at the request of the Climatronic Control Module -J255- to accelerate the engine warming up, for example, when the A/C system is switched off.
   • Removing and Installing. Refer to COOLANT SYSTEM/COOLANT [DAZA] / COOLANT SYSTEM/COOLANT [CNTC, CYFB] (Connection Diagram for Coolant Hoses).

Tightening Specification for the nuts on the Fresh Air Intake 

Fig 1: Tightening Specification for the Nuts on the Fresh Air Intake

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the nuts -arrows- to 3 Nm.

Tightening Specification for the Nuts on the Rain Water Drain Channel

Fig 2: Nut Location In Rain Water Drain Channel

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the nuts -arrows- to 3 Nm.