986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - Help me understand how the Steering angle sensor and Psm Module affect ABS?

thstone · 07-23-2017, 08:17 PM

Both ABS and PSM use the wheel sensors to provide wheel speed inputs.

The steering angle sensor is used by the PSM (along with all of the other inputs) to calculate the slip angle of the tires.

Then the PSM will determine if the car is understeering or oversteering and apply braking to an individual wheel as needed to help maintain control.

Porsche allows PSM to be turned off while ABS remains active but I don't know if you can force the PSM off permanently.

07-23-2017, 08:17 PM	#2
thstone Certified Boxster Addict Join Date: Nov 2010 Location: Los Angeles Posts: 7,669	Both ABS and PSM use the wheel sensors to provide wheel speed inputs. The steering angle sensor is used by the PSM (along with all of the other inputs) to calculate the slip angle of the tires. Then the PSM will determine if the car is understeering or oversteering and apply braking to an individual wheel as needed to help maintain control. Porsche allows PSM to be turned off while ABS remains active but I don't know if you can force the PSM off permanently. __________________ 1999 996 C2 - sold - bought back - sold for more 1997 Spec Boxster BSR #254 1979 911 SC POC Licensed DE/TT Instructor Last edited by thstone; 07-23-2017 at 08:19 PM.