Dynamic Stability Control (DSC)

Dynamic Stability Control (DSC)

Diagnosis instructions

Remedying faults and/or deleting the fault memory
If problems occur on deleting the fault memory following a repair, use the following procedure:
1. Remedy fault with ignition off
2. Ignition on; delete fault memory
3. Switch off ignition: wait 5-10 seconds, switch ignition on again.
4. Delete fault memory again

IMPORTANT: In some cases, indicator and warning lights for certain faults only go out after a short test drive.

Sequence for replacement of DSC unit or DSC control unit
After replacement of the DSC unit or of the DSC control unit, the control unit codes itself. In this operation, the vehicle identification number is also stored. This means that adjustment of the steering angle sensor with DSC 8/DSC 8Plus is not required. For every startup (ignition on), the DSC compares the stored vehicle identification number with the current vehicle identification number. DSC codes itself according to the type of vehicle if the vehicle identification numbers do not match. This opportunity is used to reset the learned adjustment values of the sensors to the base setting (exception: longitudinal acceleration sensor). The following work is to be carried out:
1. Encoding DSC
(RPA data is encoded; E90 all wheel drive: SZL data is encoded)
2. Brake bleeding procedure for DSC unit
3. Brake line mix-up test:
4. Initialize Run Flat Indicator (see operating instructions)

Replacement of DSC sensor
After replacement of the DSC sensor, the service function "Adjustment DSC sensor" must be run. The longitudinal acceleration sensor is adjusted in the DSC sensor.

Replacement of steering angle sensor
The steering angle sensor forms a unit with the steering column switch cluster. It cannot be renewed alone. The service function "Adjust steering angle sensor" or in the case of vehicles with active steering the service function "Commissioning/aligning active steering" must be run after the following work:
- Replacement of steering column switch cluster
- Re-programming the steering column switch cluster
- Replacement of DSC control unit
- Adjustment procedure on the steering geometry
- Work on the steering and/or front axle

General notes on DSC 8Plus
The all-wheel drive system xDrive is fitted in the E60 all wheel drive model (known from E53 and E83). The system is based on a development of the DSC 8, the Dynamic Stability Control DSC 8Plus:
- The control unit has been completely revised and contains new functions (See also operating instructions):
- Drive-off assistant
- Brake standby
- Dry braking
- Increase in the brake pressure on fading
- Soft stop

- The exterior of the hydraulic control unit is unchanged. The technology for valve activation has been revised to enable finer control.
- The DSC sensor contains a lateral acceleration sensor, a rotation-rate sensor and additionally a longitudinal acceleration sensor.