Assembly overview – speed sensor on front axle
The overview is shown for the left side of the vehicle as an example.
1 - Wheel bearing housing
2 - Front left speed sensor -G47-/front right speed sensor -G45-
❏ → Rep. gr.45; Removing and installing speed sensor on front axle [G45]/[G47]
3 - Bolt
❏ 8 Nm
Assembly overview – speed sensors on rear axle
Overview is shown for left side of vehicle as an example
1 - Bolt
❏ 8 Nm
2 - Rear left speed sensor -G46-/rear right speed sensor -G44-
❏ → Rep. gr.45; Removing and installing speed sensor on rear axle [G44]/[G46]
3 - Wheel bearing unit
❏ With ABS sensor ring
❏ → Rep. gr.45; Checking ABS sensor ring
❏ → Running gear, axles, steering; Rep. gr.42; Wheel bearing, trailing arm; Removing and installing wheel bearing unit
Removing and installing speed sensor on front axle [G45]/[G47]
Removing
Front right speed sensor -G45- and front left speed sensor -G47- are referred to hereafter as speed sensor.
Removal and installation are described for the left side of vehicle as an example.
– Raise vehicle.
– Disconnect electrical connector -3- from speed sensor -1-.
– Unscrew bolt -2-, and pull speed sensor -1- out of wheel bearing housing.
Installing
Install in reverse order of removal, observing the following:
– Before inserting speed sensor, clean inner surface of hole, and coat speed sensor all-round with high-temperature paste → Electronic parts catalogue (ETKA).
→ Rep. gr.45; Assembly overview – speed sensor on front axle
Removing and installing speed sensor on rear axle [G44]/[G46]
Removing
Removal and installation are described for the left side of vehicle as an example.
Rear right speed sensor -G44- and rear left speed sensor -G46- are referred to hereafter as rear speed sensor.
– Raise vehicle.
– Disconnect electrical connector -2- from speed sensor -3-.
– Unscrew bolt -1-, and pull speed sensor -3- out of wheel bearing housing.
Installing
Install in reverse order of removal, observing the following:
– Before inserting rear speed sensor, clean inner surface of hole, and coat rear speed sensor all-round with high-temperature paste → Electronic parts catalogue (ETKA).
Tightening torques
♦ → Rep. gr.45; Assembly overview – speed sensors on rear axle
Checking ABS sensor ring
Special tools and workshop equipment required
♦ Sensor gauge for -T10473-
– Remove wheel bearing unit:
♦ Front wheel bearing unit → Running gear, axles, steering; Rep. gr.40; Wheel bearing; Removing and installing wheel bearing unit
♦ Rear wheel bearing unit → Running gear, axles, steering; Rep. gr.42; Wheel bearing, trailing arm; Removing and installing wheel bearing unit
– Use sensor gauge -T10473- -A- to check ABS sensor ring -2- on wheel bearing unit -1- all around.
Test pattern for ABS sensor ring
A - ABS sensor ring is OK
B - ABS sensor ring is defective
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