This function resets the adaptation values for the power steering and initialises and adapts the steering angle sensor to the power steering.
This must be done if:
The steering servo has been replaced or refitted following repairs.
Repairs have been carried out on the steering gear.
The front axle chassis geometry has been adjusted.
A trouble code that requires basic setting is stored in the power steering control unit.
If the power steering control unit has been replaced, it must be correctly adapted.
Test conditions:
Before basic setting is carried out on the steering angle sensor, the power steering adaptation values must be cleared. This is done using the "Power steering" function.
Engine on.
Access to a stretch of road that fulfils the conditions set out below.
The ignition must not be switched off during basic setting.
Procedure:
Start the engine and turn the steering wheel approximately 90° to the left and right.
Test drive on a level surface at a maximum speed of 30 km/h and check that the steering wheel is in the correct position when driving in a straight line.
Stop the vehicle while driving in a straight line and ensure that the steering wheel has not turned.
Select the "Power steering" function.
Once this function is complete, select the "Initialise steering angle sensor" function.
A dialogue box shows: "correct” to confirm that initialisation has been successful. The steering servo test lamp comes on.
Drive a short distance in a straight line and turn the steering wheel approximately 360° to the left and right to initialise the steering angle sensor. The steering servo test lamp goes out.
Check that no trouble codes are stored in the power steering control unit.
Exit the function.
If the function fails, check that the steering wheel is in the centre position and that the components are correctly fitted.