With Manufacturer's Scan Tool

Misfiring Recognition, Checking

Special tools and equipment
- V.A.G 1551 scan tool or V.A.G 1552 mobile scan tool with V.A.G 1551/3B adapter cable

Test conditions
- Engine is OK mechanically.
- No code must be stored in DTC memory, Checking and Erasing DTC Memory. DTC Memory, Checking and Erasing (Functions 02 and 05)

Test sequence
- Connect V.A.G 1551 scan tool (V.A.G 1552). Start engine and select "Address word" 01 of engine control module. Engine must be running at idling speed.(Connecting scan tool and selecting engine control module.) [1][2][3]Connecting VAG 1551 Scan Tool

Indicated on display:

Rapid data transfer HELP
Select function XX

Press keys 0 and 8 for function "Read measured value block" and confirm entry with Q key.

Indicated on display:

Read measured value block
Input display group number XXX

- Press keys 0, 1 and 4 for "Display group number 14" and confirm entry with Q key.

Indicated on display:(1 to 4 = Display zones)

Read measured value block 14
1 2 3 4

- Check total number of misfires in display zone 3.
- Check misfire recognition status in display zone 4.







If the specifications are obtained:
- Press -> key.
- Press keys 0 and 6 for "End output" function and confirm input with Q key.
- Switch ignition off.

If the specifications are not attained:
Change to display group 15 as follows:

Indicated on display:(1 to 4 = Display zones) 4

Read measured value block 15
1 2 3 4

- Check misfiring in display zones 1 to 3.
- Check misfire recognition status in display zone 4.







If the specifications are obtained:
- Change to display group 16 as follows:
- Press key 3 (V.A.G 1551) or key -> (V.A.G 1552).

Indicated on display:(1 and 4 = Display zones)

Read measured value block 16
1 4

- Check misfiring in display zones 1 to 3.
- Check misfire recognition status in display zone 4.







- Press -> key.

- Press keys 0 and 6 for "End output" function and confirm input with Q key.
- Switch ignition off.

Evaluating display group 14, display zone 3 - total number of exhaust damaging misfires







Evaluating display groups 15, display zones 1 to 3 and display group 16, display zone1.total number of exhaust damaging misfires Cyl. 1 to Cyl.4