Camshaft adjustment function, checking
- Connect VAG1551/1552 Scan Tool (ST) and press buttons -0- and -1- to insert "Engine Electronics" address word 01 (engine running at idle). See VAG1551/VAG1552 SCAN TOOL (ST), CONNECTING AND SELECTING "ENGINE ELECTRONICS" ADDRESS WORD 01 .
Indicated on display
- Press buttons -0- and -8- to select "Read Measuring Value Block" function 08, and press -Q- button to confirm input.
Indicated on display
- Press buttons -0-, -9- and -0- to input display group number 90 (090), and press -Q- button to confirm input.
Indicated on display (1-4 - display groups)
NOTE:
Display field 2 indicates whether the engine control module has activated the camshaft adjustment.
- "CS-ctrlOFF:" camshaft adjustment is not active.
- "CS-ctrlON:" camshaft adjustment is active (this can only be attained during a test drive)
Display fields 3 and 4 show whether the camshaft adjustment did actually occur (via input from sensors):
- Normal Position: -3.0° to 6.0° KW.
- Shifted position: 16.0° KW to 25.0° KW.
NOTE:
If, during the test drive, display field 3 and/or 4 displays a value between 6.0° KW and 16.0° KW, the electrical valves for camshaft adjustment have switched the oil pressure to the respective mechanical camshaft adjuster, but it cannot attain the correct end position (e.g. due to sluggishness).
WARNING:
A second technician is required to operate the VAG1551 scan tool during the road test. See SAFETY PRECAUTIONS
.
- Accelerate from rest in 1st gear (manual) or with selector lever in "2" position (automatic).
- Check specified values for camshaft adjustment (display fields 2-4).
DISPLAY GROUP 90: CAMSHAFT ADJUSTMENT
| Display fields | ||||
|---|---|---|---|---|
| 1 | 2 | 3 | 4 | |
| Display group 90: Camshaft adjustment | ||||
| Display | xxx RPM | CS-ctrlOFF CS-ctrlON |
x,x °KW | x,x °KW |
| Indicates | Engine speed (in 40 RPM steps) |
Camshaft adjustment off/on | Response of camshaft adjustment Bank 1 | Response of camshaft adjustment Bank 2 |
| Work range | 1000-5000 RPM | - | -3.0 to 25.0 °KW | -3.0 to 25.0 °KW |
| Specified Value | 600-760 RPM (all-wheel drive) or |
CS-ctrlOFF | -3.0 to 6.0 °KW (normal position) |
-3.0 to 6.0 °KW (normal position) |
| 680-840 RPM (front -wheel drive) |
||||
| ....RPM (test drive) | CS-ctrlON | 16.0 to 25.0 °KW (shifted position) |
16.0 to 25.0 °KW (shifted position) |
|
| - | If the specified values are not attained, check solenoid valves for camshaft adjustment. See VALVES FOR CAMSHAFT ADJUSTMENT, CHECKING . | |||
If specified values are attained:
- Press --> button.
- Press buttons -0- and -6- to select "End Output" function 06, and press -Q- button to confirm input.