Evaporative System Testing

Evaporative emissions system, checking, Vehicles 1997 to 1999

Special tools and equipment






VAG 1551/1552 Scan Tool

Note: The VAG 1552 Scan Tool can be used instead of the VAG 1551 but a printout is not possible.






VAG 1551/3 adapter cable for VAG 1551/1552 Scan Tool

Checking requirements

No malfunctions stored in DTC memory
All electrical consumers switched OFF, e.g. lights and rear window defogger must be OFF
A/C switched OFF

Functional check

- Connect VAG 1551/1552 Scan Tool.
- Start engine and let idle.
- Press buttons -0- and -1- to select "Engine electronics" address word 01.






Display will appear as shown

- Press buttons -0- and -4- to select "Basic setting" function 04.
- Press -Q- button to enter input.






Display will appear as shown

- Press buttons -1-, -5- and -3- buttons to select Display group 153.
- Press -Q- button to enter input.






Indicated on display (1 to 4 = Display fields)

- Run engine at idle speed (800-880 RPM) and check specifications after 60 seconds.






- Press -> button