Misfire recognition, checking: Checking

Connect VAG1551/1552 Scan Tool (ST) and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (with engine running at idle). See VAG1551/VAG1552 SCAN TOOL (ST), CONNECTING AND SELECTING "ENGINE ELECTRONICS" ADDRESS WORD 01 .

Indicated on display

Fig 1: Checking Misfire Recognition Using VAG Scan Tool (1 Of 5)

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

Indicated on display

Fig 2: Checking Misfire Recognition Using VAG Scan Tool (2 Of 5)

Press buttons -0-, -1- and -4- to input display group number 14 (014), and press -Q- button to confirm input.

Indicated on display (1-4 - display groups)

Fig 3: Checking Misfire Recognition Using VAG Scan Tool (3 Of 5)

Compare displayed values with specified values for misfire recognition (display fields 3-4):

DISPLAY GROUP 14: MISFIRE RECOGNITION

	Display groups
	1	2	3	4
Display group 14: Misfire recognition
Display	xxx RPM	xx.xx ms	xxx	activated deact
Indicates	Engine speed (in 40 RPM steps)	Engine load	Misfire harmful to emissions (total)	Misfire recognition status
Range	0-6800 RPM	0.00-12.75 ms	-	-
Specified value	600-760 RPM (all-wheel drive)	1.0-2.5 ms	30	activated
Specified value	680-840 RPM (front -wheel drive)	1.0-2.5 ms	30	activated
	-	-	If displayed values are NOT OK, see EVALUATION OF DISPLAY GROUPS 15 AND 16 .

If displayed values are OK:

Press --> button.
Press buttons -0- and -6- to select "End Output" function 06, and press -Q- button to confirm input.
Check readiness code. See READINESS CODE .
If Diagnostic Trouble Code (DTC) memory has been erased, or ECM has been disconnected, generate new readiness code. See READINESS CODE, CHECKING .

If displayed values are NOT OK:

Press -C- button.
Press buttons -0-, -1- and -5- to input display group number 15 (015), and press -Q- button to confirm input.

Indicated on display (1-4 - display groups)

Fig 4: Checking Misfire Recognition Using VAG Scan Tool (4 Of 5)

Compare displayed values with specified values for misfire recognition (display fields 1-4):

DISPLAY GROUP 15: MISFIRE RECOGNITION

	Display groups
	1	2	3	4
Display group 15: Misfire recognition
Display	xxx	xxx	xxx	activated deact
Indicates	Misfire harmful to emissions, Cyl. 1	Misfire harmful to emissions, Cyl. 2	Misfire harmful to emissions, Cyl. 3	Misfire recognition status
Range	500	500	500	-
Specified value	0 - 5	0 - 5	0 - 5	activated
Specified value	If displayed values are NOT OK, see EVALUATION OF DISPLAY GROUPS 15 AND 16 .

If displayed values are OK:

Press -C- button.
Press buttons -0-, -1- and -6- to input display group number 16 (016), and press -Q- button to confirm input.

Indicated on display (1 -4 - display groups)

Fig 5: Checking Misfire Recognition Using VAG Scan Tool (5 Of 5)

Compare displayed values with specified values for misfire recognition (display fields 1 and 4):

DISPLAY GROUP 16: MISFIRE RECOGNITION

	Display groups
	1	2	3	4
Display group 16: Misfire recognition
Display	xxx	xxx	xxx	activated deact
Indicates	Misfire harmful to emissions, Cyl. 4	Misfire harmful to emissions, Cyl. 5	Misfire harmful to emissions, Cyl. 6	Misfire recognition status
Range	500	500	500	-
Specified value	0 - 5	0 - 5	0 - 5	activated
Specified value	If displayed values are NOT OK, go to EVALUATION OF DISPLAY GROUPS 15 AND 16