BMW 3 series E46 facelift (2001-2006) nca Wiring diagrams

30 RF WHL SPD RF WHL SPD ABS/ASC UNIT (LEFT REAR OF ENGINE COMPT) ASC SWITCH BLU WIRE BLU/RED WIRE BLU/VIO WIRE BRAKE FLUID LEVEL SWITCH BRAKELIGHT SWITCH (ON BRACKET, ABOVE BRAKE PEDAL) BRN WIRE BRN/BLK WIRE BRN/GRN/YEL WIRE BRN/RED WIRE CAN LOW GROUND DIGITAL MOTOR ELECTRONICS CONTROL UNIT FUSE FUSE HOLDER (GLOVE BOX) GRN WIRE GRN/BLU WIRE GRN/BLU/YEL WIRE GRY/BLK/YEL WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, ACCY OR START INSTRUMENT CLUSTER CONTROL MODULE LEFT FRONT SPEED SENSOR (WHEEL HUB) LEFT REAR SPEED SENSOR (WHEEL HUB) LR WHL SPD LR WHL SPD MIRROR FOLD-IN CONTROL UNIT NAVIGATION COMPUTER NCA WIRE RED WIRE RED/BLU WIRE RED/YEL WIRE RIGHT FRONT SPEED SENSOR (WHEEL HUB) RIGHT REAR SPEED SENSOR (WHEEL HUB) RR WHL OUT BRAKE FLUID LR SPD OUT CAN HIGH SWITCH CENTER VIO WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/RED WIRE

30 RF WHL SPD RF WHL SPD ABS/DSC UNIT (RIGHT REAR OF ENGINE COMPT) BLK WIRE BLK/RED/WHT WIRE BLK/VIO WIRE BLK/VIO/YEL WIRE BLU WIRE BLU/BLK WIRE BLU/BLK/YEL WIRE BLU/BRN/YEL WIRE BLU/RED WIRE BLU/VIO WIRE BLU/WHT/YEL WIRE BLU/YEL WIRE BRAKE FLUID LEVEL SWITCH BRAKELIGHT SWITCH (ON BRACKET, ABOVE BRAKE PEDAL) BRN WIRE BRN/BLK WIRE BRN/GRN/YEL WIRE BRN/RED WIRE CAN LOW GROUND DIGITAL MOTOR ELECTRONICS CONTROL UNIT (LEFT REAR OF ENGINE COMPT) DSC SENS DSC SENSOR RIGHT FRONT SPEED SENSOR (WHEEL HUB) DSC SWITCH FUSE FUSE HOLDER (GLOVE BOX) GRN WIRE GRN/BLU WIRE GRN/BLU/YEL WIRE GRY/BLK/YEL WIRE HOT AT ALL TIMES HOT IN RUN OR START HOT IN RUN, ACCY OR START INSTRUMENT CLUSTER CONTROL MODULE LEFT FRONT SPEED SENSOR (WHEEL HUB) LEFT REAR SPEED SENSOR (WHEEL HUB) LR WHL SPD LR WHL SPD MIRROR FOLD-IN CONTROL UNIT NAVIGATION COMPUTER NCA WIRE PARK BRAKE PRESSURE SENSOR 1 PRESSURE SENSOR 2 PARK BRAKE SWITCH RED WIRE RED/BLK WIRE RED/BLU WIRE RED/YEL WIRE RIGHT REAR SPEED SENSOR (WHEEL HUB) RR WHL OUT BRAKE FLUID LR SPD OUT CAN HIGH STEERING ANGLE SENSOR (IN COLUMN) SWITCH CENTER VIO WIRE WHT/BLU WIRE WHT/BLU/YEL WIRE WHT/GRN WIRE WHT/VIO WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/RED WIRE

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 SOLAR SENS SIG A/C PRESS SENS 1 2 3 4 5 6 INTERIOR LIGHTS SIG IGN RUN/ST REAR DEFOGGER SIG WATER VALVE SIG 1 2 3 VENT FLAP MTR VENT FLAP MTR VENT FLAP MTR A/C PRESS SENS K-BUS SIG BATT A/C PRESS SENS POLLUTANT SENS BLK/GRN WIRE BLK/GRY WIRE BLK/YEL WIRE BLOWER MOTOR (FRONT OF AIR CONDITIONING UNIT) BLOWER OUTPUT STAGE (LEFT SIDE OF RIGHT FOOTWELL) BLU WIRE BLU/BRN WIRE BLU/RED WIRE BRN WIRE BRN/BLK WIRE DEFOGGER SYSTEM DEFROSTER FLAP MOTOR EVAPORATOR TEMPERATURE SENSOR (RIGHT SIDE OF LEFT FOOTWELL) FOOTWELL FLAP MOTOR FUSE 28 FUSE 50 FUSE 62 FUSE HOLDER (GLOVE BOX) GND GND POLLUTANT SENS POLLUTANT SENS SOLAR SENS SIG POLLUTANT SENS GRN/YEL WIRE GRY/RED WIRE HEATED EXCHANGER SENSOR (BEHIND CENTER CONSOLE) HEATING, A/C CONTROL MODULE (CENTER CONSOLE) HOT AT ALL TIMES HOT IN RUN, START LEFT FRESH AIR/ RECIRCULATED AIR FLAP MOTOR NCA WIRE POLLUTANT SENSOR (FRONT OF ENG COMPT) PRESSURE SENSOR, AIR CONDITIONING SYSTEM (RIGHT FRONT WHEELWELL) RED WIRE RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO/YEL WIRE RIGHT FRESH AIR/ RECIRCULATED AIR FLAP MOTOR SOLAR SENSOR (CENTER TOP OF DASH) VENTILATION FLAP MOTOR VOLT SUPPLY A/C SENS GND EVAPORATOR TEMP A/C SENS GND HEATED EXCHANGER WATER VALVES (LEFT SIDE OF ENG COMPT) WHT/RED/YEL WIRE YEL WIRE YEL/BLK WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/RED WIRE

2001-02 ALL MODELS, 2003-05 SEDAN, WAGON 2003-05 COUPE, CONVERTIBLE A/C COMPRESSOR RELAY (IN FRONT PWR DIST BOX) BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/GRY WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/RED WIRE BRN WIRE BRN/BLK WIRE BUS SIG CAN CAN BUS BUS HI COMPUTER DATA LINES SYSTEM COOLANT OUTLET TEMPERATURE SENSOR DIGITAL MOTOR ELECTRONIC CONTROL UNIT (LEFT REAR OF ENG COMPT) ELECTRIC FAN (FRONT OF ENG COMPT) FUSE 3 FUSE 34 FUSE 37 FUSE 63 FUSE 9 FUSE HOLDER (GLOVE BOX) GND LO GRN WIRE GRN/BLU WIRE GRY WIRE HOT AT ALL TIMES HOT IN ACCY, RUN, START HOT IN RUN, START HOT W/ DME RLY ENERGIZED IGN INSTRUMENT CLUSTER CONTROL MODULE (IN INSTRUMENT PANEL) NCA WIRE OUTSIDE TEMP GND OUTSIDE TEMP SIG RED WIRE RED/BLU WIRE RED/VIO/YEL WIRE RED/WHT WIRE RIGHT BUTTON PAD (IN STEERING WHEEL) SOLENOID CLUTCH (LEFT SIDE OF RIGHT FOOTWELL) TEMPERATURE SENSOR (UNDER FRONT LEFT OF VEHICLE) UNDER FENDER) VIO/YEL WIRE VOLUTE SPRING WHT WIRE WHT/RED WIRE WHT/RED/YEL WIRE YEL WIRE YEL/BRN WIRE YEL/RED WIRE

17 32 37 36 RPM SIG DIAG TXD CAN (-) CAN (+) 25 10 9 14 DIAG TXD CAN (-) CAN (+) K-BUS 3 4 6 CAN (-) CAN (+) DIAG TXD 32 36 37 DIAG TXD CAN (+) CAN (-) 6 4 DIAG TXD CAN (-) CAN (+) 8 16 DIAG TXD CAN (-) CAN (+) ABS/DSC UNIT ABS/DSC UNIT (AWD) BLK WIRE BRN WIRE BRN/BLK WIRE CONTROL UNIT) DIAG TXD DIAG TXD CAN (-) CAN (+) DIAG TXD CAN (-) CAN (+) 40 24 DIGITAL MOTOR ELECTRONICS DRIVER SEAT MEMORY CONTROL UNIT DRIVER SIDE MIRROR MEMORY CONTROL VOLUTE SPRING DSC STEERING ANGLE SENSOR ELECTRONIC IMMOBILIZER CONTROL UNIT FUSE FUSE HOLDER (GLOVE COMPT) GENERAL MODULE CONTROL UNIT GRN WIRE GRN/BRN WIRE HEATING, A/C CONTROL MODULE HOT AT ALL TIMES HOT IN RUN OR START INSTRUMENT CLUSTER K- BUS K- BUS K- BUS LEFT XENON HEADLIGHT (W/ XENON LIGHTS) LIGHT SWITCHING CENTER CONTROL UNIT MULTIPLE RESTRAINT SYSTEM CONTROL UNIT NCA WIRE OBD SOCKET (LEFT FOOTWELL) PARK DISTANCE CONTROL UNIT RAIN SENSOR RED WIRE RED/YEL/WHT WIRE RIGHT XENON HEADLIGHT (W/ XENON LIGHTS) ROLLOVER SENSOR (CONVERTIBLE) RPM SIG SEQUENTIAL MANUAL GEARBOX (SMG) CONTROL MODULE STEERING ANGLE SENSOR SUNROOF MODULE CONTROL UNIT SWITCH CENTER FRONT PASSENGER SIDE MIRROR MEMORY TIRE PRESSURE SYSTEM CONTROL UNIT TRANSMISSION CONTROL UNIT UNIT) VOICE INPUT W/ SMG W/O SMG WHT WIRE WHT/RED/YEL WIRE WHT/VIO WIRE YEL WIRE YEL/BRN WIRE YEL/RED WIRE

BASIC INTERFACE TELEPHONE CD CHANGER INTERFACE K- BUS NAVIGATION COMPUTER NCA WIRE ON-BOARD MONITOR CONTROL UNIT RADIO CONTROL UNIT TELEMATICS CONTROL MODULE (TCU EVEREST) UNIVERSAL ELECTRONIC CHARGING, HANDSFREE MODULE VIDEO MODULE CONTROL UNIT W/ KEYPAD HANDSET SBDH W/ ON-BOARD MONITOR W/ TELEMATICS CONTROL MODULE W/ UNIVERSAL ELECTRONIC CHARGING, HANDSFREE MODULE W/ V-SERIES MOBILE PHONE W/O ON-BOARD MONITOR WHT/RED/YEL WIRE

8 4 5 6 VOLTAGE SUPPLY GROUND GROUND GROUND BLK WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/RED WIRE BRAKELIGHT SWITCH (ON BRACKET, ABOVE BRAKE PEDAL) BRN WIRE BRN/BLK WIRE BRN/BLU WIRE BRN/GRN WIRE BRN/GRY WIRE BRN/ORG WIRE BRN/VIO WIRE BRN/WHT WIRE CAN (+) CAN (-) CAN (+) DIAG TXD CLUTCH PEDAL POSITION SWITCH (IF EQUIPPED) COMPUTER DATA LINES SYSTEM DIAG TXD CAN (+) CAN (-) 36 37 DIGITAL MOTOR ELECTRONICS (DME) CONTROL UNIT (LEFT REAR OF ENGINE COMPT) E-BOX (LEFT REAR OF ENGINE COMPT) ELECTRIC THROTTLE ACTUATOR (TOP LEFT SIDE OF ENGINE) FUSE 2 FUSE 9 FUSE HOLDER (GLOVE BOX) GRY WIRE GRY/WHT WIRE HOT AT ALL TIMES HOT IN ACC, RUN OR START INSTRUMENT CLUSTER CONTROL MODULE K- BUS LEFT BUTTON PAID (IN STEERING WHEEL) NCA WIRE PEDAL POSITION SENSOR (BEHIND ACCEL PEDAL) RED WIRE RED/WHT/YEL WIRE RIGHT BUTTON PAID (IN STEERING WHEEL) TRANSMISSION CONTROL UNIT VIO WIRE VIO/YEL WIRE VOLUTE SPRING WHT WIRE WHT/GRN WIRE WHT/RED/YEL WIRE WHT/VIO WIRE YEL WIRE YEL/BRN WIRE YEL/GRN WIRE YEL/RED WIRE

BLK WIRE BLU WIRE BRN WIRE FUSE FUSE HOLDER (GLOVE BOX) GRN WIRE HARDTOP LOCATOR II HEATING, A/C CONTROL MODULE HOT AT ALL TIMES HOT IN RUN OR START NCA WIRE REAR WINDOW DEFOGGER RELAY (RIGHT SIDE OF LUGGAGE COMPT) REAR WINDOW DEFROSTER RED WIRE WHT WIRE YEL WIRE

1 2 3 4 5 6 INTERIOR LIGHTS SIG IGN RUN/ST REAR DEFOGGER SIG WATER VALVE SIG 1 2 3 VENT FLAP MTR VENT FLAP MTR VENT FLAP MTR A/C PRESS SENS A/C PRESS SENS K-BUS SIG BATT A/C PRESS SENS AIR DISTRIBUTION MOTOR BLK WIRE BLK/GRN WIRE BLK/GRY WIRE BLK/WHT WIRE BLK/YEL WIRE BLOWER MOTOR (FRONT OF AIR CONDITIONING UNIT) BLOWER OUTPUT STAGE (LEFT SIDE OF RIGHT FOOTWELL) BLU/BRN WIRE BLU/RED WIRE BRN BLK/ WIRE BRN WIRE BRN/BLK WIRE BRN/RED WIRE DEFOGGER SYSTEM EVAPORATOR TEMPERATURE SENSOR (RIGHT SIDE OF LEFT FOOTWELL) FUSE 28 FUSE 50 FUSE 62 FUSE HOLDER (GLOVE BOX) GND GND GRN/YEL WIRE GRY/RED WIRE HEATED EXCHANGER SENSOR (BEHIND CENTER CONSOLE) HEATING, A/C CONTROL MODULE (CENTER CONSOLE) HOT AT ALL TIMES HOT IN RUN, START LEFT FRESH AIR/ RECIRCULATED AIR FLAP MOTOR NCA WIRE PRESSURE SENSOR, AIR CONDITIONING SYSTEM (RIGHT FRONT WHEELWELL) RED/BLU WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO/YEL WIRE RIGHT FRESH AIR/ RECIRCULATED AIR FLAP MOTOR VOLT SUPPLY A/C SENS GND EVAPORATOR TEMP A/C SENS GND HEATED EXCHANGER WATER VALVE (LEFT SIDE OF ENG COMPT) WHT/RED/YEL WIRE YEL/BLK WIRE YEL/GRN WIRE YEL/RED WIRE

2001-02 ALL MODELS, 2003-05 SEDAN, WAGON 2003-05 COUPE, CONVERTIBLE A/C COMPRESSOR RELAY (IN FRONT PWR DIST BOX) BLK WIRE BLK/BLU WIRE BLK/GRN WIRE BLK/GRY WIRE BLU WIRE BLU/BLK WIRE BLU/BRN WIRE BLU/RED WIRE BRN WIRE BRN/BLK WIRE BUS SIG CAN CAN BUS BUS HI COMPUTER DATA LINES SYSTEM COOLANT OUTLET TEMPERATURE SENSOR DIGITAL MOTOR ELECTRONIC CONTROL UNIT (LEFT REAR OF ENG COMPT) ELECTRIC FAN (FRONT OF ENG COMPT) FUSE 3 FUSE 34 FUSE 37 FUSE 63 FUSE 9 FUSE HOLDER (GLOVE BOX) GND LO GRN WIRE GRN/BLU WIRE GRY WIRE HOT AT ALL TIMES HOT IN ACCY, RUN, START HOT IN RUN, START HOT W/ DME RLY ENERGIZED IGN INSTRUMENT CLUSTER CONTROL MODULE (IN INSTRUMENT PANEL) NCA WIRE OUTSIDE TEMP GND OUTSIDE TEMP SIG RED WIRE RED/BLU WIRE RED/VIO/YEL WIRE RED/WHT WIRE RIGHT BUTTON PAD (IN STEERING WHEEL) SOLENOID CLUTCH (LEFT SIDE OF RIGHT FOOTWELL) TEMPERATURE SENSOR (UNDER FRONT LEFT OF VEHICLE) UNDER FENDER) VIO/YEL WIRE VOLUTE SPRING WHT WIRE WHT/RED WIRE WHT/RED/YEL WIRE YEL WIRE YEL/BRN WIRE YEL/RED WIRE