Skoda Workshop Service and Repair Manuals > Octavia Mk1 > Drive unit | 2.0 ltr./85 kW Engine, Fuel Injection and Ignition System | Self diagnosis, V.A.G Inspection Service | Self-diagnosis VII | Reading measured value block, display groups 66 to 126 | Display group 070 - exhaust gas reduction - diagnosis of activated charcoal filter system

Display group 070 - exhaust gas reduction - diagnosis of activated charcoal filter system

l	Engine runs in idling speed

l	Coolant temperature at least 60 °C (display group 77, display field 1)

l	Control unit in function 04 - initiate basic setting

System in basic setting 70 →

← Read-out on display

xxx.x %

xx.x %

xx.x g/s
xx.x % ¹⁾

Text

← Display fields

Specification

Analysis

Result of diagnosis (Test ON / Test OFF or TVV O.K. / TVV N.O.K)

TVV O.K.

—

Idling speed controller variation during TVV diagnosis

0...0.33 g/s
do not observe ¹⁾

—

Lambda controller variation during TVV diagnosis

-7,8...7,8 %
ignore ¹⁾

—

On/off ratio of activated charcoal filter solenoid valve

0,0...100,0 %

—

¹⁾ For engines with identification characters AZH, AZJ.

Note

TVV means Tank Vent Valve (activated charcoal filter solenoid valve). Diagnosis can only be initiated once each time the engine is started.

Note

t	Re display field 2:

t	Lambda regulator variation in negative range: activated charcoal filter full.

t	Lambda regulator variation in positive range: activated charcoal filter empty.