Ignition System: Testing and Inspection

Misfire recognition, checking

Test sequence
- Connect VAS5051 tester or VAG1551 scan tool and select the control module for engine electronics using "address word" 01. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAS5051/VAG1551 Scan Tool" Testing and Inspection
Engine must run at idle for this.

When indicated on display:


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -8- to select "Read measuring value block" function 08. Press - Q- button to confirm input.

When indicated on display:


Read Measuring Value Block Q
Input display group number XXX


- Press buttons -0-, -1- and -4- to select "display group number 014" and press -Q- button to confirm input.

When indicated on display:


Read Measuring Value Block 14 ->
1 2 3 4


- Check misfire recognition in display fields 3 and 4

Display Group 14:

If specified value is obtained:
- Press -> button.

Indicated on display (function selection):


Rapid data transfer HELP
Select function XX


Check misfire recognition of the individual cylinders.
- Press -C- button.

When indicated on display:


Read Measuring Value Block Q
Input display group number XXX


- Press buttons -0-, -1- and -5- to select "display group number 015" and press -Q- button to confirm input.

When indicated on display:


Read Measuring Value Block 15 ->
1 2 3 4


- Check misfire recognition in display fields 1 to 4.

Display Group 15:

- Press -C- button. 4

When indicated on display:


Read Measuring Value Block Q
Input display group number XXX


- Press buttons -0-, -1- and -4- to select "display group number 014" and press -Q- button to confirm input. .

When indicated on display:


Read Measuring Value Block 16 ->
1 2 3 4


- Check misfire recognition in display fields 1 to 4.

Display Group 16:

Evaluation Display Group 014, Display Field 3 and Display Group 015 and 016, Display Fields 1 , 2 and 3