Overview - Reducing Agent Active Tank And Attachments

WARNING: This page is about a different car, the 2015 Audi Q7, 2014 Audi Q7, and 2013 Audi Q7. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

Installed location: under the wheel housing liner in right rear wheel housing

Fig 1: Reducing Agent Tank Components Location

Courtesy of AUDI OF AMERICA, LLC

Union Nut
- Remove and install with Wrench - Union NutT50014
- Tightening. Refer to Installing .
Heating Reservoir
- With Reducing Agent Tank Sensor -G684-
- With Reducing Agent Temperature Sensor -G685-
- With Reducing Agent Tank Heater (Heating Circuit 1) -Z102-
- With filter
  CAUTION:
  When tightening the union nuts the heating reservoir must not turn.
  
  The installation position of the hearing reservoir must not be turned.
- Removing and installing. Refer to HEATING RESERVOIR, REMOVING AND INSTALLING .
- Do not bend the heat mats when installing them
Seal
- Replace
- Install dry
Bolt
- 9 Nm
Active Tank
- For the reducing agent
- Removing and installing. Refer to REDUCING AGENT ACTIVE TANK, REMOVING AND INSTALLING .
Transfer Line
- From the Reducing Agent Transfer Pump -V436- to the active tank
- Clipped in on fuel tank
Reducing Agent Tank Cap Switch -F502-
- Installation position and tightening specification. Refer to Fig 4.
- Installed depending on the market.
- Removing and installing. Refer to Reducing Agent Tank Cap Switch -F502-, REMOVING AND INSTALLING .
Cap
Filling Line
- From the active tank to the passive tank
- Clipped in on fuel tank
Reducing Agent Pump -V437-
- With Reducing Agent Pump Heater (Heating Circuit 2) -Z103-
- With Reducing Agent Metering System Pressure Sensor -G686-
- Removing and installing. Refer to Reducing Agent Pump -V437-, REMOVING AND INSTALLING .
  WARNING:
  Danger due to reducing agent leaking out.
  - To prevent large amounts of reducing agent from leaking out when opening the metering line, wait for the recirculation process to complete. Refer to SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM SAFETY PRECAUTIONS .
- Removing and installing the Reducing Agent Metering System Pressure Sensor -G686-. Refer to Reducing Agent Metering System Pressure Sensor -G686-, REMOVING AND INSTALLING .
- Tightening specification for the Reducing Agent Metering System Pressure Sensor -G686- version 1. Refer to Fig 2.
- Tightening specification for the Reducing Agent Metering System Pressure Sensor -G686- version 2. Refer to Fig 3.
Metering Line
- From the Reducing Agent Pump -V437- to the Reducing Agent Injector -N474-
- Clipped in on fuel tank
  WARNING:
  Danger due to reducing agent leaking out.
  - To prevent large amounts of reducing agent from leaking out when opening the metering line, wait for the recirculation process to complete. Refer to SELECTIVE CATALYTIC REDUCTION (SCR) SYSTEM SAFETY PRECAUTIONS .
Bolt
- 1.8 Nm
Return Line
- Clip onto the active tank
Supply Line
- Clip onto the active tank

Fig 2: Reducing Agent Metering System Pressure Sensor -G686- Version 1 - Tightening Specification

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the Reducing Agent Metering System Pressure Sensor -G686- -2- to 8 Nm.

Fig 3: Reducing Agent Metering System Pressure Sensor -G686- Version 2 - Tightening Specification

Courtesy of AUDI OF AMERICA, LLC

-- Tighten the bolts -2 and 4- to 1.5 Nm.

Fig 4: Installed Position and Tightening Specification for Reducing Agent Tank Cap Switch -F502-.

Courtesy of AUDI OF AMERICA, LLC

-- Slide the Reducing Agent Tank Cap Switch -F502-, as shown in the illustration, onto the active tank all the way until it stops -arrow-.

-- Tighten the bolt -1- to 0.6 Nm.