Leak Detection Pump V144 , Removing And Installing - Audi Q7 2007 Repair Manual

Audi Q7 2007 ➤
Fuel Supply System - Edition 10.2018
– Fold the floor covering to the side -arrow-.
– Remove nuts -1 to 4- and remove right and left locking flange
cover.
Note
Observe installation notes for locking flanges. Refer to
⇒ page 54 .
– Check whether seals under locking flanges are OK and lock
rings are properly tightened on fuel tank. Also check the fuel
line connections.
– Visually check all wires and hose connections of fuel supply
system and replace leaking lines, for example:
♦ Line from EVAP canister to EVAP Canister Purge Regulator
Valve 1 - N80-
♦ Line from fuel tank to EVAP canister.
♦ Tank ventilation system lines.
♦ Seal between EVAP canister and Leak Detection Pump -
V144- .
♦ Fuel line to engine.
Note
Leaks at lines and components of tank system can sometimes be
located using a nonflammable, environmentally compliant leak
detection spray. For this, initiate leak diagnostic several times in
sequence to build up pressure in the system. At leaking areas,
bubbles will form.
– Perform a visual inspection on the fuel system components
and tank ventilation system:
♦ Fuel Tank
♦ EVAP Canister
♦ Leak Detection Pump - V144-
♦ EVAP Canister Purge Regulator Valve 1 - N80-
Note
Due to the form or function of the components, leaking areas may
not always be localized by spraying on leak detection spray. It
may be necessary to clamp off the relevant component using
Hose Clamps - Up To 25mm - 3094- and initiate tank leak detec‐
tion diagnostic. If the leak is no longer indicated, the component
that was clamped off is defective. If clamped off directly at the leak
detection pump and a leak is still indicated, the leak detection
pump itself is leaking.
4.6 Leak Detection Pump - V144- , Remov‐
ing and Installing
Removing
– On a vehicle with air suspension, activate vehicle lift mode.
Refer to ⇒ Suspension, Wheels, Steering; Rep. Gr. 43 .
66
Rep. Gr.20 - Fuel Supply
Protected by copyright. Copying for private or commercial purposes, in part or in whole, is not
permitted unless authorised by AUDI AG. AUDI AG does not guarantee or accept any liability
with respect to the correctness of information in this document. Copyright by AUDI AG.