BMW X5 2001 Bedienungsanleitung PDF herunterladen (Seite 10)

X5 Dynamic Stability Control

Steering Angle Sensor (LEW)

The Steering angle sensor is mounted at the

bottom of the steering spindle (in front of the

flex coupling).

The sensor is equipped with a processor

and is directly linked to the CAN bus to com-

municate with the DSC III module.

The sensor still utilizes two potentiometers to determine the steering angle and the rate of

steering. These are the raw signals the CAN Bus microprocessor utilizes to create the steer-

ing angle signal for broadcast on the CAN bus.

The sensor requires calibration after repairs to the steering or suspension system (found in

DIS Service Functions). Once the calibration is completed the sensor now also sends an

identification number over the CAN bus to the DSC III module. The ID provides confirma-

tion in the DSC module that the steering angle sensor is properly calibrated.

If the ID differs due to component swapping it will not be possible to enter the DSC system

for diagnosis. The DIS will request that the steering angle sensor be recalibrated using the

service functions. Once complete a new ID number is generated and the DSC III control

module and Steering angle sensor are properly mated.

The DSC III logic checks the plausibility of the steering angle sensor against the other DSC

III inputs (front wheel speeds, rotation and lateral acceleration sensors). If battery voltage

is interrupted, the current steering wheel rotation is recalculated by the DSC module eval-

uating the front wheel speeds.

Replacement steering angle sensors must be ZCS coded when installed in the vehicle prior

to the calibration procedure.

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BMW X5 2001 Bedienungsanleitung Seite 10