Test procedure

Connect VAG1551 Scan Tool (ST) or VAG1552 mobile scan tool. Start engine and press buttons -0- and -1- to select "Engine Electronics" address word 01 (engine must be running at idling speed), see VAG1551 SCAN TOOL (ST), CONNECTING AND SELECTING FUNCTIONS .
Indicated on display

Fig 1: VAG1551 Scan Tool Display - Checking Misfire Recognition (1 Of 4)
Courtesy of VOLKSWAGEN OF AMERICA, INC.
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: VAG1551 Scan Tool Display - Checking Misfire Recognition (2 Of 4)
Courtesy of VOLKSWAGEN OF AMERICA, INC.
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 fields)

Fig 3: VAG1551 Scan Tool Display - Checking Misfire Recognition (3 Of 4)

Courtesy of VOLKSWAGEN OF AMERICA, INC.

DISPLAY GROUP 014: IGNITION, MISFIRE RECOGNITION

	Display fields
	1	2	3	4
Display group 014: Ignition, misfire recognition
Display	xxxx RPM	xxx %	xxx	Activated Blocked
Indicated	Engine speed (in 40 steps)	Engine load	Three Way Catalytic Converter (TWC) damaging misfires (total)	Misfire recognition status
Working range	0-6800 RPM	0-100 %	0-65000	-
Specified value	680-720 RPM	greater than 14%	0	activated
	-	-	If the specified value is not obtained Evaluating display group 14, see Evaluating display group 14, display field 3: total number of Three Way Catalytic Converter (TWC) damaging misfires

If the specifications are obtained:

Press --> button.
Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
Switch ignition off.

If the specified values are not attained:

Change to display group 15 as follows:
Press button -3- (VAG1551) or button (VAG1552).
Indicated on display: (1 -4 - display fields)

Fig 4: VAG1551 Scan Tool Display - Checking Misfire Recognition (4 Of 4)

Courtesy of VOLKSWAGEN OF AMERICA, INC.

DISPLAY GROUP 015: IGNITION, MISFIRE RECOGNITION

	Display fields
	1	2	3	4
Display group 015: Ignition, misfire recognition
Display	xxx	xxx	xxx	Activated Blocked
Indicated	Three Way Catalytic Converter (TWC) damaging misfires, Cyl. 1	Three Way Catalytic Converter (TWC) damaging misfires, Cyl. 2	Three Way Catalytic Converter (TWC) damaging misfires, Cyl. 3	Misfire recognition status
Working range	0-65000	0-65000	0-65000	-
Specified value	0	0	0	activated
Specified value	If the specification is not obtained, see Evaluating display groups 15 and 16, display fields 1 -3: total number of Three Way Catalytic Converter (TWC) damaging misfires Cyl. 1 - Cyl. 6

If the specifications are obtained:

Change to display group 16 as follows:
Press button -3- (VAG1551) or button (VAG1552).
Indicated on display: (1 and 4 - display fields)

Fig 5: VAG1551 Scan Tool Display - Read Measuring Value Block 16
Courtesy of VOLKSWAGEN OF AMERICA, INC.
Check misfiring in display field 1.
Check misfire recognition status in display field 4.

DISPLAY GROUP 016: MISFIRING RECOGNITION

	Display fields
	1	2	3	4
Display group 016: Misfiring recognition
Display	xxx	xxx	xxx	Active Blocked
Indicated	Exhaust damaging misfires Cyl. 4	Exhaust damaging misfires Cyl. 5	Exhaust damaging misfires Cyl. 6	Misfire status recognition
Working range	0-65000	0-65000	0-65000	-
Specified value	0	0	0	activated
Specified value	If the specification is not obtained, see Evaluating display groups 15 and 16, display fields 1 -3: total number of Three Way Catalytic Converter (TWC) damaging misfires Cyl. 1 - Cyl. 6

Press --> button.
Press buttons -0- and -6- to select "End Output" function 06 and press -Q- button to confirm input.
Switch ignition off.