Operation CHARM: Car repair manuals for everyone.

Test Step 6

Subject of test:

Operation and connection of wheel speed sensors






Note:
^ Only read scale 1 after the LED 2 lights up without flickering

^ The scale is divided into 8 steps

^ When wheel speed is too high, LED 2 goes out

^ The wheel speed sensors are selected individually using wheel selector switch 4

Pos. 5 = Left Front ABS Wheel
Speed Sensor G47

Pos. 6 = Right Front ABS Wheel
Speed Sensor G45

Pos. 7 = Left Rear ABS Wheel
Speed Sensor G46

Pos. 8 = Right Rear ABS Wheel
Speed Sensor G44









- Wheel selector switch 4 in position 6. Test Right Front Wheel Speed Sensor G45 starting with test step 6.3.

- Wheel selector switch 4 in position 7. Test Left Rear Wheel Speed Sensor G46 starting with test step 6.3.

- Selector switch 4 in position 8. Test Right Rear Wheel Speed Sensor G44 starting with test step 6.3.

Note:

^ 2 seconds after the ignition is switched on, the ABS Warning Light K47 must go out.

^ Drive at least 30 km/h (20 mph) for longer than 20 seconds. During this time, the ABS Warning Light K47 must not light up again.