Function test

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2001 Volkswagen Jetta, 2000 Volkswagen Jetta, 2000 Volkswagen Golf, 2000 Volkswagen GTI, and 1999 Volkswagen Jetta. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

If the accelerator pedal is depressed during the test, the test will be aborted.

Connect the scan tool.
Start the engine and run at idle for at least 15 minutes.
Select "Mode 8: Tank Leak Test".
Select " Tank Leak Test".

Check the specified value of the tank leak test at idle.
The following may be displayed on the scan tool screen:

Tank leak test

Specified value

Test function active
Test function is being initiated, please wait

Test off
Test aborted

Test OK

Switch the ignition off.

If the specified result is obtained:

System OK.

If the specified result is not obtained:

Repeat the tank leak test, switch the ignition off and start the engine again and let run for 15 minutes at idle.
Switch the ignition off.

If the specified result is again not obtained:

A leak may be present. Refer to → Evaporative Emission (EVAP) canister system, checking for proper seal .

End diagnosis.