Camshaft Adjustment Control, Checking

Camshaft adjustment control, checking

Camshaft adjustment control, function

The adjustment of the intake camshafts is controlled according to engine load and engine speed. The timing of the exhaust camshafts is not variable.

The electrically operated solenoid valves for camshaft adjustment transmit oil pressure to the mechanical camshaft adjusters.

The mechanical camshaft adjusters then advance the inlet camshafts for both cylinder banks, which means that the inlet valves will open earlier.

Checking camshaft adjustment function

- Connect Vehicle Diagnostic, Testing and Information System VAS5051 or VAG 1551 Scan Tool and select engine electronics control module by entering address word "01", Refer to "Scan Tool Testing/Scan Tool Connecting and Initial Checks/Connecting VAG 1551/ VAS 5051 Scan Tool" Testing and Inspection . When doing this the engine must be idling.

Indicated on display


Rapid data transfer HELP
Select function XX


- Press buttons -0- and -4- to select function "Basic setting" and confirm entry by pressing -Q- button.

Indicated on display


Basic Setting
Input display group number XXX


- Press buttons -0-, -9- and -4- to select "display group number 094" and confirm entry with -Q- button.

Indicated on display


Basic Setting 94 ->
1 2 3 4


- Check specified display value for camshaft adjustment control.







- Increase engine speed to approx.: 2000 RPM until "CS-ctrl. ON" appears in display field 2







- Maintain engine speed until "Syst. OK" appears in display fields 3 and 4.







If the specified readout is not obtained in display fields 3 and 4, test solenoid valves for camshaft adjustment.