9. Stop light switch · Installationposition: in front of the brake pedal

9. Stop light switch Installationposition: in front of the brake pedal ? Whenthe brake is actuated,signals from the twin contact (make and break)are detected and evaluated by the control module. If the brake is actuated during an ASR control operation, this procedure is immediatelyinterrupted in order to initiate an ABS control operation. During an FORcontrol operation, these signals are processed in addition to the brake pressure 4_22_99 signal. 11. PSM OFF switch 10. Steering-angle sensor Installation position: in the centre console Installation position: on the steering column in front of the intermediate shaft The system can be switched off by means of a switch in the centre console. System deactiva- The steering-anglesensor suppliesinformation tion is displayedby the indicator lights in the about the slip angle of the front wheelsto the PSM switch and in the instrumentcluster. The PSM control module (intentionof driver in rela- ABD function (automatic brake differential)is tion to direction of travel). In the PSM control mo- maintainedwhen the PSM is switchedoff. dule this signal is used to calculate the required vehicle behaviourwith respect to its transverse dynamicsby means of the calculation of the vehicle speed. The sensor has its own micro- controller. The information is transmitted to the PSM control module by means of a CAN data bus. ~ ~ 0 0- 001 100 '"-'" 4_39_99 45 -D 70 4503 Diagnosis/troubleshooting PSM~m