Note:
The test is used to control whether the wheel speed sensors are faultless and correctly installed.
Test prerequisites:
The engine must be switched off.
The parking brake must be released.
The wheels must be blocked on the axle which is not lifted.
The pressure must be at least 7 bar in the brake system.
Only rotate one wheel at a time.
Procedure:
Block the wheels and lift the appropriate axle. Block the wheel which shall not be rotated.
Activate the test.
Rotate the relevant wheel to display speed.
Allow the wheel to rotate freely. The lowest speed which can be read just before 0 km/h, should be lower than 6 km/h.
When the test is finished, end the diagnosis! Then turn off the ignition and wait 10 seconds before turning the ignition back on.