skoda Workshop Repair Guides

Skoda Fabia Workshop Service and Auto Repair Manuals

1.4/55; 1.4/59; 1.4/74 engine - fuel injection > < Check engine speed sender G28
Inspecting misfiring detection (only for engines with identification characters ATZ, AQW, AZF)
Inspecting misfiring detection (only for engines with identification characters ATZ, AQW, AZF)
Special tools and workshop equipment required
t  Vehicle system tester -V.A.G 1552 -
t  Diagnostic cable -V.A.G 1551/3- or -V.A.G 1551/3A- or -V.A.G 1551/3B-
Test sequence
–  Connect vehicle system tester -V.A.G 1552-. Start engine and select “address word 01” for engine electronics → Chapter.
–  Enter function 08 “read measured value block” and display group number 014.
   
–  Readout on display:
–  Check the sum of all misfirings since engine start in display field 3.
Specified value: 0…10 (applies for max. 5 min after engine start)
–  Check the status of misfiring detection in display field 4.
   Specified value: activated
If the specified values are reached:
–  Select function 06 “End output” and confirm with Q.
–  Switch off ignition.
If the specified values are not reached:
–  Test ignition terminals and spark plugs → Chapter.
–  Testing injection valves → Chapter.
 
Reading measured value block         14   ->
 800 rpm      34.0 %      0      activated

1.4/55; 1.4/59; 1.4/74 engine - fuel injection > < Check engine speed sender G28