Ignition System: Testing and Inspection

Misfiring Recognition, Checking

Special tools and equipment
- VAG 1551 Scan Tool or VAG 1552 with cable VAG 1551/3

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

Indicated on display

Rapid data transfer HELP
Select function XX

- Press keys 0 and 8 for function "Read Measuring Value Block" and confirm entry with Q key.

Indicated on display

Read Measuring 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 Measuring Value Block 14 ->
1 2 3 4

- Check total number of misfires in display zone 3:
Specification: 0 to 5
- Check misfire recognition status in display zone 4:
Specification: activated

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:
- Check spark plugs and ignition/HT cables, Removing and installing parts of ignition system
- Check ignition coils with power output stages Testing and Inspection
- Check injectors. Testing and Inspection