System test Possible causes,elimination, notes · Test steps 20 -23

System test Possible causes,elimination, notes Test steps 20 -23 Check speed sensors for Test step No.: function and incorrect 20 = Front left wheel allocation. 21 = Front right wheel To do this, go to the Actual 22 = Rear left wheel values menu and select the 23 = Rear right wheel wheel speeds there. Rotate all four wheels 1. Rotate the wheel on which the test step is not OK. individually. When each The non-testedwheel must be held when the test is performed wheel is rotated, the speed on the driven axle. allocated to the wheel must If an indicationfor a different wheel now appears in the Tester be displayed. display, the electrical wires are swapped (incorrect allocation of The non-testedwheel must the speed sensors). This is normally not possible, but could occur if be held when the test is an impermissiblerepair was performed on the wiring harnessafter performed on the driven axle. an accident repair. 2. Perform troubleshootinganalogousto test points 2 to 9 (depending on the wheel in question)on Page 45 -D 24 ft. Test step 24 Check the engine speed in Perform troubleshooting analogous to test point 20 (Engine rpm the Actual values menu. information missing / DTC 5283) on Page 45 -D 34. The current engine speed is displayed if the engine is running. 45 -D 52