Operation CHARM: Car repair manuals for everyone.
Manuals through 2025 now available!

Our trusted friends have launched a new website named LEMON, which has newer manuals. It also contains all the CHARM manuals.

LEMON is the spiritual successor to CHARM, I recommend you try it!

Link: lemon-manuals.la or lemon-manuals.org.ua

(Some people have issue connecting. LEMON is investigating. For now, use Firefox or change your DNS server)

Or, hide this message: temporarily or permanently

Ignition System: Testing and Inspection




Misfire Recognition, Checking

Test Sequence
- Connect vehicle diagnostic, testing and information system VAS5051 or VAG1551 scan tool and select engine electronics control module by entering address word "01". When doing this the engine must be at idle. Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAS5051 or VAG1551" Testing and Inspection


Indicated on display


Rapid data transfer HELP
Select function XX



- Press buttons -0- and -8- to select function "Read Measuring Value Block" and confirm entry with -Q- button.


Indicated on display


Read Measuring Value Block
Input display group number XXX



- Press buttons -0-, -1- and -4- to select "Display Group 014" and confirm entry with - Q- button.


Indicated on display

Read Measuring Value Block 14 ->
1 2 3 4


- Check misfire recognition.







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


Indicated on display (select function)

Rapid Data Transfer HELP
Select function XX


Evaluation display group 003