Ignition System: Testing and Inspection

Misfiring Recognition, Checking

Special tools and equipment







- VAS5051 orVAG1551

Test sequence
- Connect Vehicle Diagnostic, Testing and Information System VAS 5051 or VAG 1551, Vehicle Diagnostic, Testing and Information System VAS 5051, Connecting and Selecting Functions tester and select control module for engine electronics 1 by inserting address word 01. Engine must be running at for this test.

Indicated on display:
Rapid data transfer HELP
Select function XX

- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08 and press Q button to confirm input.

Indicated on display:
Read Measuring Value Block Q
Input display group number XXX

- Press buttons -0-, -1- and -4- to input "display group number 14" and press Q button to confirm input.

Indicated on display:
Read Measuring Value Block 14 ->
1 2 3 4

- Check misfire detection.







If the specified value is reached:
- Press -> button.

Indicated on display (funktion selection):
Rapid data transfer HELP
Select function XX

Testing misfiring recognition of each cylinder







Display on VAS 5051:
- Check misfiring recognition in display zones -1- to -4-.







- Press the Up Arrow button to advance to Display group 016.







Display on VAS 5051:
- Check misfiring recognition in display zones -1- and -4-.







- Press the <- button to exit from the function "08 - Read data block".

Evaluation of Display groups 014, 15 and 16, Display zone 3: