BMW 3 series E46 (1998-2003) computer data lines system Wiring diagrams

1 2 3 LUMBAR SW - ADJUSTMENT SWITCHES BLK/VIO WIRE BLK/YEL WIRE BLU/GRY WIRE BLU/RED WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DRIVER'S SEAT BACKREST ADJUSTMENT MOTOR DRIVER'S SEAT FORWARD/ BACKWARD ADJUSTMENT MOTOR DRIVER'S SEAT HEIGHT ADJUSTMENT MOTOR DRIVER'S SEAT MEMORY CONTROL UNIT DRIVER'S SEAT TILT ADJUSTMENT MOTOR FUSE FUSE HOLDER (GLOVE BOX) GENERAL MODULE CONTROL UNIT (BEHIND GLOVE BOX) GRN/VIO WIRE GRN/YEL WIRE GRY/BLK WIRE GRY/BRN WIRE HOT AT ALL TIMES ILLUM INSTRUMENT CLUSTER CONTROL MODULE LUMBAR SW + PROGRAM SWITCHES (3) RED/BLK WIRE RED/BRN WIRE SEAT BACKREST SEAT HEIGHT SEAT TILT SEAT FWD/BACK SEAT BACKREST) SEATS SYSTEM (LUMBAR CIRCUIT, IF EQUIPPED) SET SWITCH VIO/BLK WIRE VIO/BRN WIRE VIO/GRY WIRE VIO/RED WIRE WHT/RED/YEL WIRE YEL/BLK WIRE YEL/BRN WIRE

BLK WIRE BLK/VIO WIRE BLK/YEL WIRE BLU/BLK/YEL WIRE BLU/GRN WIRE BLU/GRY WIRE BLU/RED WIRE BLU/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DRIVER'S SEAT ADJUSTMENT SWITCH DRIVER'S SEAT BACKREST ADJUSTMENT MOTOR DRIVER'S SEAT BACKREST LOCK SWITCH DRIVER'S SEAT ENTRY FACILITY SWITCH (BACKREST) DRIVER'S SEAT FORWARD/ BACKWARD ADJUSTMENT MOTOR DRIVER'S SEAT HEADREST ADJUSTMENT MOTOR DRIVER'S SEAT HEIGHT ADJUSTMENT MOTOR DRIVER'S SEAT MEMORY CONTROL UNIT DRIVER'S SEAT TILT ADJUSTMENT MOTOR FUSE FUSE HOLDER (GLOVE BOX) GENERAL MODULE CONTROL UNIT (BEHIND GLOVE BOX) GRN/BLK WIRE GRN/BRN WIRE GRN/RED WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLK WIRE GRY/BLU WIRE GRY/WHT WIRE HOT AT ALL TIMES ILLUM INSTRUMENT CLUSTER CONTROL MODULE PASSENGER'S SEAT MEMORY CONTROL UNIT PROGRAM SWITCHES (3) RED/BLU WIRE RED/BRN WIRE RED/WHT WIRE RED/YEL WIRE SEAT ADJUSTMENT SW ENTRANCE AID ENTRANCE AID SEAT ADJUSTMENT SW SEAT ADJUSTMENT SW SEAT ADJUSTMENT SW SEAT ADJUSTMENT SW ENTRANCE AID SEAT TILT SEAT BACKREST SEAT HEADREST SEAT FWD/BACK TERM 30 SET SWITCH VIO/BRN WIRE VIO/GRY WIRE VIO/RED WIRE W/ ENTRANCE AID WHT WIRE WHT/GRN WIRE WHT/RED WIRE WHT/RED/YEL WIRE WHT/YEL WIRE YEL WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 TERM 30 DATA ADJUST SW ADJUST SW ADJUST SW ADJUST SW TERM 31 TERM 31 BLK WIRE BLU WIRE BLU/BLK WIRE BLU/GRN WIRE BLU/WHT WIRE BLU/YEL WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DRIVER'S OUTSIDE MIRROR DRIVER'S SEAT MEMORY CONTROL UNIT DRIVER'S SIDE MIRROR MEMORY CONTROL UNIT FOLDING MOTOR FUSE FUSE HOLDER (GLOVE BOX) GENERAL MODULE CONTROL UNIT GRN WIRE GRY WIRE HEATING ELEMENT HORIZONTAL MOTOR, POSITIONAL SENSOR HORIZONTAL SENS VERTICAL SENS POSITION SENS + HORIZONTAL SENS VERTICAL SENS POSITION SENS + PNK WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER CONTROL MODULE MIRROR ADJUSTMENT SWITCH ORG/ WIRE PASSENGER'S OUTSIDE MIRROR PASSENGER'S SIDE MIRROR MEMORY CONTROL UNIT PNK WIRE RED WIRE RED/GRN/YEL WIRE SET SWITCH PROGRAM SWITCHES (3) TERM 31 VERTICAL MOTOR, POSITIONAL SENSOR WHT WIRE WHT/RED/YEL WIRE YEL WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 REVERSE SIG 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 TERM 30 1 2 GPS ANT GPS ANT SHLD A/T ABS/ASC UNIT (LEFT REAR OF ENGINE COMPT) AF SIG ACT+ GROUND AF SIG ACT- AF SIG- ANTI-LOCK BRAKES SYSTEM AUDIO L+ AUDIO R- AUDIO SIG L- AUDIO SIG R- BLK WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/YEL WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FUSE FUSE HOLDER (GLOVE BOX) GPS ANTENNA GROUND GRY/RED WIRE HOT AT ALL TIMES HOT IN RUN, ACCY OR INSTRUMENT CLUSTER CONTROL MODULE K-BUS SIG LIGHTING M/T NAV BUS NAVIGATION COMPUTER (LEFT SIDE OF LUGGAGE COMPT) NCA WIRE ON-BOARD MONITOR CONTROL UNIT RADIO CONTROL UNIT RED/GRN WIRE SIG SIG NAV BUS SIG SHLD SPEED SIG TERM 30 TERM R VIDEO GROUND VIDEO SIG SHLD VIDEO SIG SHLD VIDEO SIG SHLD VIDEO SIG VIDEO SIG VIDEO SIG VIO/WHT WIRE W/ DSC W/O ASC W/O AWD W/ AWD WHT/BLU WIRE WHT/RED/YEL WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/GRN WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 REVERSE SIG 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 TERM 30 1 2 GPS ANT GPS ANT SHLD A/T ABS/ASC UNIT (LEFT REAR OF ENGINE COMPT) AF SIG ACT+ GROUND AF SIG ACT- AF SIG- ANTI-LOCK BRAKES SYSTEM BLU/YEL WIRE BRN WIRE COMPUTER DATA LINES SYSTEM FUSE FUSE HOLDER (GLOVE BOX) GPS ANTENNA HOT AT ALL TIMES INSTRUMENT CLUSTER CONTROL MODULE K-BUS SIG M/T NAV BUS NAVIGATION COMPUTER (LEFT SIDE OF LUGGAGE COMPT) NCA WIRE RADIO CONTROL UNIT RED/GRN WIRE SPEED SIG W/ DSC W/O ASC W/O AWD W/ AWD WHT/BLU WIRE WHT/RED/YEL WIRE YEL WIRE YEL/GRN WIRE

1 2 3 4 SIG LGHT LOC GND RADIO RADIO 6 7 8 9 10 11 12 K-BUS TERM 30 BLK WIRE BLU/BLK WIRE BLU/BRN WIRE BRN WIRE BRN/RED WIRE COMPUTER DATA LINES SYSTEM FUSE FUSE HOLDER (GLOVE BOX) GRN WIRE GRY/RED WIRE HOT AT ALL TIMES HOT IN ACC, RUN OR START NAVIGATION SYSTEM NCA WIRE ON-BOARD MONITOR CONTROL UNIT RADIO RADIO TERM R RED WIRE RED/GRN WIRE SHIELD SHIELD VID LCD GND SOUND SYSTEMS SOUND SYSTEMS VID SIG BLU WIRE VID SIG GRN WIRE VID SIG RED WIRE VIO WIRE VIO/WHT WIRE WHT WIRE WHT/RED/YEL WIRE YEL/BLK WIRE YEL/BRN WIRE

1 2 3 4 5 6 7 8 9 10 11 12 TERM 15 A/T BLU/GRY WIRE BLU/YEL WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/WHT WIRE BRN/YEL WIRE CHIME MODULE COMPUTER DATA LINES SYSTEM FUSE FUSE HOLDER (GLOVE BOX) GRN/BLK WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GROUND HOT IN RUN OR START K- BUS LEFT CENTER CONVERTER LEFT REAR CONVERTER M/T REVERSE SIG RIGHT CENTER CONVERTER RIGHT REAR CONVERTER WHT/RED/YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/GRY WIRE

BACKREST LOCK SW BLK WIRE BLK/VIO WIRE BLK/YEL WIRE BLU/BLK/YEL WIRE BLU/GRN WIRE BLU/RED WIRE BLU/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM DRIVER'S SEAT MEMORY CONTROL UNIT FUSE FUSE HOLDER (GLOVE BOX) GENERAL MODULE CONTROL UNIT (BEHIND GLOVE BOX) GRN/BRN WIRE GRN/RED WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/BLK WIRE GRY/WHT WIRE HOT AT ALL TIMES INSTRUMENT CLUSTER CONTROL MODULE PASSENGER'S SEAT ADJUSTMENT SWITCH PASSENGER'S SEAT BACKREST ADJUSTMENT MOTOR PASSENGER'S SEAT BACKREST LOCK SWITCH PASSENGER'S SEAT ENTRY FACILITY SWITCH (BACKREST) PASSENGER'S SEAT FORWARD/ BACKWARD ADJUSTMENT MOTOR PASSENGER'S SEAT HEADREST ADJUSTMENT MOTOR PASSENGER'S SEAT HEIGHT ADJUSTMENT MOTOR PASSENGER'S SEAT TILT ADJUSTMENT MOTOR PASSENGER'S SEAT MEMORY CONTROL UNIT PROGRAM SWITCHES (3) RED/BLU WIRE RED/BRN WIRE RED/WHT WIRE SEAT ADJUSTMENT SW SEAT ADJUSTMENT SW ENTRANCE AID ENTRANCE AID SEAT ADJUSTMENT SW SEAT ADJUSTMENT SW SEAT ADJUSTMENT SW SEAT ADJUSTMENT SW ENTRANCE AID SEAT FWD/BACK SENS SEAT HEADREST SENS BACKREST LOCK SW BACKREST LOCK SIG SEAT HEADREST SENS SEAT TILT SEAT BACKREST SEAT HEADREST SEAT FWD/BACK TERM 30 SET SWITCH VIO/GRY WIRE VIO/RED WIRE W/ ENTRANCE AID WHT WIRE WHT/GRN WIRE WHT/RED WIRE WHT/RED/YEL WIRE WHT/YEL WIRE YEL WIRE YEL/RED WIRE

1 2 3 LUMBAR SW - ADJUSTMENT SWITCHES BLK/VIO WIRE BLK/YEL WIRE BLU/GRY WIRE BLU/RED WIRE BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DRIVER'S SEAT MEMORY CONTROL UNIT FUSE FUSE HOLDER (GLOVE BOX) GENERAL MODULE CONTROL UNIT (BEHIND GLOVE BOX) GRN/VIO WIRE GRN/YEL WIRE HOT AT ALL TIMES ILLUM INSTRUMENT CLUSTER CONTROL MODULE LUMBAR SW + PASSENGER'S SEAT BACKREST ADJUSTMENT MOTOR PASSENGER'S SEAT FORWARD/ BACKWARD ADJUSTMENT MOTOR PASSENGER'S SEAT HEIGHT ADJUSTMENT MOTOR PASSENGER'S SEAT MEMORY CONTROL UNIT PASSENGER'S SEAT TILT ADJUSTMENT MOTOR PROGRAM SWITCHES (3) RED/BRN WIRE SEAT FWD/BACK SEATS SYSTEM (LUMBAR CIRCUIT, IF EQUIPPED) SET SWITCH TERM 31 SEAT BACKREST VIO/GRY WIRE VIO/RED WIRE WHT/RED/YEL WIRE YEL/BLK WIRE YEL/BRN WIRE

BLK WIRE BLU WIRE BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRY WIRE BRN/VIO WIRE BRN/WHT WIRE CENTRAL LOCKING DRIVE, TRUNK LID/TAILGATE (REAR LUGGAGE COMPT) COMPUTER DATA LINES SYSTEM GRY/BRN WIRE GRY/GRN WIRE GRY/RED WIRE HAZARD WARNING/ CENTRAL LOCKING SWITCH LIFT GATE LOCK SWITCH (IN LUGGAGE COMPT LID RIGHT) RED WIRE SYSTEM LOCK, REAR DRIVER'S DOOR SYSTEM LOCK, REAR PASSENGER'S DOOR TRUNK LID RELEASE SOLENOID SWITCH WHT WIRE WHT/BRN WIRE WHT/RED/YEL WIRE YEL WIRE YEL/RED WIRE