Test sequence
- Test drive vehicle.
Observe the valid safety precautions when performing a road test. See SAFETY PRECAUTIONS .
- Connect VAG 1551 Scan tool (or VAG 1552) and select engine electronics control module with "Address word" 01. Engine must be running at idling speed: (Connecting scan tool and selecting engine electronics control module. See VAG 1551 AND MOTRONIC ENGINE CONTROL MODULE (ECM) -J220-, CONNECTING AND SELECTING
).
Indicated on display:
- Press buttons -0- and -8- for function "Read measured value (data) block" and confirm entry with -Q- button.
Indicated on display:
- Press buttons -0-, -1- and -4- for "Display group number 14" and confirm entry with -Q- button.
Indicated on display: (1 to 4 display zones)
- Check misfire detection status in display zone 4.
Specification: "activated"
- Check total number of misfires in display zone 3.
Specification: 0
If the specifications are obtained:
- Press --> button.
- Press buttons -0- and -6- for function "End output" and confirm entry with -Q- button.
- Switch off ignition.
If the specifications are not obtained:
- Change to display group 15 as follows:
- Press button 3 (VAG 1551) or up button (VAG 1552).
Indicated on display: (1 to 4 display zones)
- Check misfire detection status in display zone 4.
Specification: "activated"
- - Check display zones 1 to 3 for detected misfires in cylinders 1 to 3.
Specification: 0
If the specifications are not obtained:
- Press --> button.
- Press buttons -0- and -6- for function "End output" and confirm entry with -Q- button.
- Switch off ignition.
Evaluating display group 15 and display group 16. See MEASURED VALUE BLOCKS, DISPLAY GROUPS 10...29 .
If the specifications are obtained:
- Change to display group 16 as follows:
- Press button 3 (VAG 1551) or up button (VAG 1552).
Indicated on display: (1 to 4 display zones)
- Check misfire detection status in display zone 4.
Specification: "activated"
- Check display zones 1 to 3 for detected misfires in cylinders 4 to 6.
Specification: 0
- Press --> button.
- Press buttons -0- and -6- for function "End output" and confirm entry with -Q- button.
- Switch off ignition.
If the specifications are not obtained:
- Evaluate display group 15 and display group 16. See MEASURED VALUE BLOCKS, DISPLAY GROUPS 10...29 .