Checking Fuel System For Leaks - Volkswagen Touareg 2003 Workshop Repair Manual

Touareg 2003 ➤
8-cylinder injection engine - Edition 11.2011
14 - Securing bolts
❑ Qty. 3
❑ 9 Nm
15 - Breather line
❑ To vacuum connection on intake manifold
❑ Check for secure seating.
16 - Connector
❑ Black, 2-pin.
17 - Activated charcoal filter solenoid valve 1 -N80-
❑ Note installation position.
18 - Rubber bracket
❑ Note installation position.
19 - Breather line
❑ Check for secure seating.
20 - Pressure retention valve
❑ Function ⇒ page 124
Function of pressure retention valve
From gravity valve (on expansion tank) the pressure retention
valve is open in both directions of flow. -Arrow 1- is the side to
expansion tank.
On the other side it is only open for flow in one direction.
-Arrow 2- is the side to activated charcoal filter.
4.2

Checking fuel system for leaks

Special tools and workshop equipment required
♦ Fuel system tester (so-called smoke tester) -KLI 9210-
♦ Adapter hose -KLI 9210/55-2-
♦ Vehicle diagnosis tester -VAS 5051B- , -VAS 5052- or -VAS
5053-
♦ Hose clamps up to 25 mm -3094-
Test prerequisite:
• A leak has been detected by the fuel system diagnostic pump
-V144- .
• Guided fault finding has been performed with the vehicle di‐
agnosis tester .
Preparation of fuel system tester -KLI 9210- :
Note
The fuel system tester -KLI 9210- may differ in appearance de‐
pending on the version.
124
Rep. gr.20 - Fuel supply system
.