Layout of ESP system components
A1e17 - ABS malfunction indicator lamp; A1e41 - ESP warning light; A1e42 - ESP malfunction indicator lamp; A1e43 - EPC fault indicator lamp; A7/3 - Hydraulic unit ASR/ETS/ESP; B24/2 - Accelerator pedal position sensor; B34 - ESP brake circuit pressure sensor; K20/1 - Pump relay; L6/1 - Left front wheel speed sensor; L6/2 - Right front wheel speed sensor; L6/3 - Left rear wheel speed sensor; L6/4 - Right rear wheel speed sensor; M15 - ASR/ESP Support Pump; N16/1 - Main control unit; N47-5 - BAS/SPS/ESP control unit; N49 - Steering wheel angle sensor; N64 - ESP yaw rate sensor; S9/1 - Brake light switch; S12 - Parking brake switch; S76/6 - ESP switch; X11/4 - Diagnostic connector; Y61 - Master Cylinder Switching Valve