Mercedes-Benz S-class W140 (1991-1998) Diagnostic socket circuit

BLU/YEL WIRE BRN WIRE BRN/GRN WIRE DIAGNOSTIC MODULE (OBD II) GENERIC SCAN TOOL CONNECTOR DIAGNOSTIC MODULE (OBD-II) ENGINE CONTROL MODULE (HFM-SFI) FUSE 17 FUSE BOX HOT AT ALL TIMES RED/WHT WIRE YEL/RED WIRE