ABS/EDL, Additional Components

ABS/EDL, additional components





The hydraulic pump for traction control -V156- (ESP) and sender 1 for brake booster -G201- are on the left side of the engine compartment (seen in the direction of travel), below the ABS hydraulic unit -N55-.

The ABS hydraulic unit -N55- with ABS return flow pump -V39- are assisted by the hydraulic pump for traction control -V156- (ESP). This enables the system to build up the required brake fluid pressure rapidly in the wheel brake cylinders.

Do not loosen the bolts securing the individual components of the ABS hydraulic unit -N55- and the hydraulic pump for traction control -V156 (ESP). The hydraulic pump for traction control -V156- (ESP) and the sender 1 for brake booster -G201- form a single unit and must always be replaced together if necessary.

The sender 1 for brake booster -G201- measures the fluid pressure generated in the brake system.

Steering angle sensor -G85- is located in a combined housing with airbag spiral spring/return spring with slip ring -F138-.





The airbag spiral spring/return spring with slip ring -F138- is installed over the central shaft of the steering column, and clipped onto the steering column switch.

There are two versions of airbag spiral spring/return spring with slip ring F138-

One with and one without the wiring required for steering wheels with additional functions. The illustration shows the version for steering wheels with additional functions.
Refer to parts Supplier

The method for removing and installing the steering angle sensor -G85- is the same as for the airbag coil connector.

WARNING:
^ Observe safety precautions for working on the airbag system.
^ The front wheels must always be in the straight-ahead position when removing and installing the steering wheel and self canceling ring with slip ring.

The steering angle sensor -G85- does not have its own DTC memory, and is therefore monitored by the diagnostic function of ABS control module (w/EDL) -J104- via CAN-Bus.

The steering angle sensor -G85- is wired directly to the power supply from terminal 30. This power supply is used by the sender for a period of one hour after the ignition is switched off, during this time there will be a current draw of up to 100 mA. At the end of this period the current draw will drop below 0.5 mA, and the sender is no longer active. The sender is re-activated via terminal 15 when the ignition is switched on again.

The sender requires this power supply from terminal 30 after the ignition is switched off to enable it to recognize any movement of the steering wheel with the ignition off.

If the ignition has been switched off for more than one hour, the sender will signal a constant steering angle of 0 degrees. The correct steering angle will then only be indicated when the steering wheel has been turned more than 4.5 degrees.





ABS control module (w/EDL) -J104- is located under the floor mat in the front passenger's footwell.

Replacing control module
- Remove lower A-pillar trim
- Remove floor mat.
- Loosen bolts securing ABS control module (w/EDL) -J104-.
- Unplug connector from ABS control module (w/EDL) -Jl04-.
- Install new control module in reverse sequence.
Tightening torque for bolts: 9 Nm (80 inch lbs.)

For non-codable control module versions:





Sender for rotation rate -G202- is located under the floor mat in the front left footwell.

It measures the vehicle's rotation about the vertical axis (rotation rate).
- To remove floor mat, first push left front seat back as far as it will go.
- Remove lower section of A-pillar trim and sill molding. On LHD vehicles, remove foot support
- Remove floor mat.
Tightening torque for bolt: 5 Nm (44 inch lbs.).





Sensor for transverse acceleration -G200- is located under the floor mat behind the seat cross member on the driver's side
- To remove floor mat, first remove driver's seat
- Remove lower section of A-pillar trim, sill molding and foot support

CAUTION: The lateral acceleration sensor is sensitive to impact Take care not to drop it, as this could damage the sensor.

Tightening torque for bolts: 5 Nm (44 inch lbs.).

For codable control module versions:
Sender for rotation rate -G202- and sensor for transverse acceleration -G200- are combined in one housing.





The dual sensor (-G200-/-G202-) is located under the rear seat bench.
- Remove rear seat bench





- Unscrew both nuts.
- Flip back protective housing and disconnect connector.
- Loosen both bolts and remove sensor from mounting plate.
Tightening torque for bolts and nuts 5 Nm (44 inch lbs.)

All vehicles:
Parking brake switch
The parking brake switch informs ABS control module (w/EDL) -J104- whether or not the parking brake is applied. This information is required because the parking brake influences the ESP control function.

ABS solenoid valve relay -J106- and ABS return flow pump relay -J105-

The ABS solenoid valve relay -J106- and ABS return flow pump relay -J105- are now located in the relay carrier below the driver's-side storage compartment
Refer to Wiring Diagrams