Dynamic Driving Safety Systems
DSC
Diagnostics
•
The steering angle sensor can be checked by:
–
Reading out DTCs
–
Checking voltage signals
–
Monitoring the corresponding PID (see below)
PID
Definition Unit/Condition
SWA_POS
Steering angle sensor
°
L2003_T02026
NOTE: The steering angle sensor does not have any serviceable parts, regardless of its
type. Whenever a malfunction occurs, it needs to be replaced as a unit. Depending
on the vehicle, the sensor must be initialised after it had been disconnected from the
power supply (refer to W/M). The steering wheel must be turned fully to the left and
then fully to the right with the engine idling. Afterwards, the DSC indicator light will
turn off. Then the ignition has to be switched off and then back on, and it must be
confirmed that the DSC indicator light stays off after a 10 minute test drive.
Replacement
•
On some models, the steering angle sensor needs to be programmed with the aid of the
M-MDS, after the sensor or the DSC HU/CM has been replaced (refer to W/M).
Brake Fluid Pressure Sensor
•
Depending on the model, the brake fluid pressure sensor is attached to or incorporated
in the DSC HU/CM or attached to the brake master cylinder (see W/M). A brake fluid
pressure sensor that is attached to the DSC HU/CM cannot be replaced as a single part.
If it has a malfunction, the entire DSC HU/CM must be replaced.
Curriculum Training
02-67