Introduction to DSC
| Model Year | E36 | E36/7 Z3 | E46 | E39 | E38 | E53 | E52 | E65, E66 | E85 |
|---|---|---|---|---|---|---|---|---|---|
| 1998 | ASC + T | ASC + T MK IV G | N/A | 9/97 ASC + T5 S: 528i DSC III 5.3 S: 540i N/A 528i | 9/97 DSC III Bosch 5.3 S: 740i/iL S: 750iL | N/A | N/A | N/A | N/A |
| 1999 | ASC + T MK IV G 328iC 318ti | ASC + T MK20 EI (Except M) ASC + T Mk IV G (M Versions) | ASC Teves MK 20 EI | 9/98 ASC + T5 S: 528i Bosch DSC III 5.7 S: 540i O: 528i | 3/98 Bosch DSC III 5.7 S: 740i/iL S: 750iL | N/A | N/A | N/A | N/A |
| 2000 | N/A | From 4/99 Teves MK 20 DSC III | DSC III Teves MK 20 EI from 6/99 | 6/99 Bosch DSC III 5.7 STD All | 3/99 Bosch DSC III 5.7 STD All | DSC III B o s c h 5.7 9/99 | DSC III B o s c h 5.7 1/00 | N/A | N/A |
| 2001 | N/A | From 9/00 Teves MK 60 DSC III M Versions Teves MK 20 DSC III | DSC III Teves MK 60 from 9/00 M3 Teves MK 20 E46/16 AWD Bosch DSC III 5.7 | DSC III Bosch 5.7 | DSC III Bosch 5.7 | DSC III B o s c h 5.7 | DSC III B o s c h 5.7 | N/A | N/A |
| 2002 | N/A | N/A | Same as 2001 | DSC III Bosch 5.7 | N/A | DSC III B o s c h 5.7 | N/A | DSC III Bosch 5.7 | N/A |
| 2003 | N/A | N/A | Same as 2001 | DSC III Bosch 5.7 | N/A | DSC III B o s c h 5.7 | DSC III B o s c h 5.7 | DSC III Bosch 5.7 | DSC III Teves MK60 |
OVERVIEW OF DSC SYSTEMS
Sensor Operation
The sensor is a sealed, self contained microprocessor that monitors the vehicle's rate of rotational acceleration on it's vertical axis. This is referred to as the "yaw" angle. The sensor contains an internal oscillating cylinder which is excited by various piezo elements to an oscillation frequency of 14 KHz. This puts the cylinder in a free floating neutral state. (zero point)
When driving, the cylinder is deflected (rotated) by the effect of the forces from the vehicle cornering - this produces the torsional "twist" on the cylinder.
The sensor counteracts the "twist" of the cylinder by increasing the pulse frequency of the piezo elements to deflect the cylinder back to it's zero point.
The pulse frequency increase in measured and represent the real time vehicle rotation rate. Based on the measurement, the sensor produces a linear DC voltage that the DSC III control module uses to determine yaw angle.
