Test 6-9
Test step 6 - 9Check speed sensor for operation and accidental interchanging. Rotate all 4 wheels individually fast enough to cause the bar graph on the tester display to move up to the stop. Caution: When checking a wheel on the rear axle, lock the opposite wheel, and in the case of four-wheel drive vehicles, lock all three other wheels.
Note
Test step No.:
6 = Front left wheel
7 = Front right wheel
8 = Rear left wheel
9 = Rear right wheel
The Speed sensors (wheel speeds) can be checked via the Actual values menu (Speed sub-menu).
- Enter the Actual values menu. Select the Speed option. Caution: If function key 1 is pressed additionally or a second time, all 4 wheels are displayed simultaneously on the tester display. Turn wheel that has displayed a test step that is not o.k. Caution: When checking a wheel on the rear axle, lock the opposite wheel, and in the case of four-wheel drive vehicles, lock all three other wheels. If the tester display now displays a not o.k. condition for a different wheel, the electrical wiring has been interchanged accidentally (incorrect assignment of speed sensors). Normally this is impossible, yet it may occur if unauthorized repairs have been made on the wiring harness during accident repair operations.
- Perform troubleshooting procedure as for test points 7 to 14 (for each wheel). Antilock Brakes / Traction Control Systems