Hydraulic Swap Test

WARNING: This page is about a different variant/trim than selected.

Information

If work has been done on the hydraulic unit, speed sensors and wire harness or if the hydraulic unit is replaced, a system check (function test) must be carried out using the PIWIS Tester . This is the case, for example, after accident repairs! This prevents any confusion of electrical or hydraulic lines and ensures faultless operation of the system.

If brake lines that are connected to an intermediate piece (cable bushing) are replaced, a system check or swap test must also be performed. Unintentional bending of the brake lines could lead to incorrect hydraulic allocation despite the different threads.

If a fault is displayed during operation (when no assembly work was carried out beforehand), diagnostics and fault finding are also carried out using the PIWIS Tester .

Connect the PIWIS Tester to the vehicle.

Select >>PSM<< in the control unit overview.
Select >>Hydraulic swap test<< under Maintenance/repairs.

Follow the instructions on the PIWIS Tester . A second mechanic is needed for the test.