Buick LaCrosse II facelift (2013-2016) Computer data lines circuit

13 14 6 15 14 5 ACCESSORY WAKEUP SERIAL DATA SER DATA (-) 1 SER DATA (+) 1 2.4L 3.6L 5 17 SER DATA (+) 1 SER DATA (-) 1 6 18 SER DATA (+) 1 SER DATA (-) 1 8 7 12 2 HS SERIAL DATA - HS SERIAL DATA + BATTERY ENERGY CONTROL MODULE BLU WIRE BLU/BLK WIRE BLU/YEL WIRE COMM ENABLE CONTROL SOLENOID VALVE ASSEMBLY AUTOMATIC TRANSMISSION ASSEMBLY DATA COM ENABLE DK BLU WIRE DK BLU/GRY WIRE DK BLU/YEL WIRE DOOR HARNESS) ENGINE CONTROL MODULE (LEFT FRONT OF ENGINE COMPT) GRY WIRE HIGH SERIAL DATA HS SERIAL DATA - HYDRID/EV BATTERY PACK LOW SERIAL DATA LT GRN/BLK WIRE PNK/BLK WIRE POWER STEERING CONTROL MODULE (LOWER LEFT SIDE OF DASH) SER DATA (-) (1) SER DATA - (3) SERIAL DATA SERIAL DATA ACC WAKEUP STARTER/GENERATOR CONTROL MODULE TAN/WHT WIRE VIO/YEL WIRE W/ BELT DRIVE W/ VARIABLE EFFORT W/O BELT DRIVE W/O VARIABLE EFFORT OR BELT DRIVE WHT WIRE WHT/BLU WIRE WHT/DK BLU WIRE WHT/YEL WIRE YEL WIRE YEL/BLK WIRE

BLU WIRE BLU/YEL WIRE BREAKOUT TO EXTENSION HARNESS) COMM ENABLE DATA COM ENABLE DK BLU WIRE DK BLU/YEL WIRE ELECTRONIC BRAKE CONTROL MODULE (LEFT SIDE OF ENGINE COMPT) GRN WIRE HS SERIAL DATA - LOW SPEED GMLAN PARKING BRAKE CONTROL MODULE (BEHIND LEFT REAR WHEEL LINER) REAR DIFFERENTIAL CLUTCH CONTROL MODULE (AWD) (MOUNTED TO REAR DIFFERENTIAL) SER DATA (+) 2 SER DATA (-) (1) SERIAL DATA VIO/YEL WIRE W/ ADAPTIVE CRUISE CONTROL W/O ADAPTIVE CRUISE CONTROL W/O CONTINUOUSLY VARIABLE REAL TIME DAMPING W/O CONTINUOUSLY VARIABLE REAL TIME DAMPING, AWD WHT WIRE WHT/BLU WIRE

BLU WIRE BLU/YEL WIRE BRN WIRE COMM ENABLE DATA COM ENABLE FRONTVIEW CAMERA MODULE (W/ LANE DEPARTURE WARNING, COLLISION ALERT) GRN WIRE GRN/VIO WIRE GRN/WHT WIRE GRY/VIO WIRE HS SERIAL DATA - HUMAN MACHINE INTERFACE CONTROL MODULE INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (BELOW CENTER CONSOLE) LEFT HEADLAMP BALLAST LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP HORIZONTAL MOTOR LINEAR INTERCONNECT NETWORK BUS 6 MOST CTRL MOST SER DATA (+) MULTI-AXIS ACCELERATION SENSOR (UNDER CENTER CONSOLE BETWEEN FRONT SEATS) NETWORK BUS 1 NETWORK BUS 5 NETWORK BUS 6 ORG/ WIRE RIGHT HEADLAMP BALLAST RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP HORIZONTAL MOTOR SER DATA SER DATA (-) (1) SER DATA COMM ENABLE SUNROOF CONTROL MODULE (BEHIND ROOF CONSOLE) SUNROOF SUNSHADE MOTOR MODULE (REAR OF SUNROOF) VIO/YEL WIRE W/ ADAPTIVE CRUISE CONTROL W/O ADAPTIVE CRUISE CONTROL WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/VIO WIRE

23 22 COMM ENABLE WAKEUP SERIAL DATA 23 24 22 HI SPD DATA - HI SPD DATA + 9 16 24 25 NETWORK BUS 2 NETWORK BUS 1 HI SPD DATA + HI SPD DATA - BLK WIRE BLU WIRE BLU/YEL WIRE BODY CONTROL MODULE (LEFT SIDE OF DASH) BRN WIRE DATA LINK CONNECTOR (LEFT SIDE OF DASH) DK BLU WIRE DLC FUSE BCM 3 FUSE GRN WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/GRY WIRE GRN/VIO WIRE GRN/WHT WIRE GRN/YEL WIRE GROUND DISTRIBUTION SYSTEM GRY/VIO WIRE HOT AT ALL TIMES HS SERIAL DATA - IMMOBILIZER CONTROL MODULE (CENTER CONSOLE) INSTRUMENT PANEL INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) LINEAR INTERCONNECT NETWORK BUS 4 LO SPD GMLAN SER DATA LOGIC LEFT REAR WINDOW SWITCH LOGIC RIGHT REAR WINDOW SWITCH LT GRN/GRY WIRE NETWORK BUS 11 NETWORK BUS 2 NETWORK BUS 3 NETWORK BUS 4 RED/GRN WIRE RED/WHT WIRE STEERING WHEEL ANGLE SENSOR TRANSMISSION SHIFT LEVER POSITION INDICATOR VIO/YEL WIRE W/ KEYLESS ENGINE START SWITCH WHT WIRE WHT/BLU WIRE WHT/GRN WIRE WHT/VIO WIRE

14 3 4 MOST CTRL MOST SER DATA - MOST SER DATA + 21 18 17 NETWORK BUS 12 MOST SER DATA - MOST SER DATA + 3 8 5 LO SPD GMLAN SER DATA NETWORK BUS 5 NETWORK BUS 10 5 6 MOST SER DATA - MOST SER DATA + AUDIO AMPLIFIER (RIGHT SIDE OF TRUNK) GRN WIRE GRN/BLK WIRE GRN/BLU WIRE GRN/BRN WIRE GRN/WHT WIRE GRN/YEL WIRE GRY/VIO WIRE HEAD-UP DISPLAY (IF EQUIPPED) INFO DISPLAY MODULE LINEAR INTERCONNECT NETWORK BUS 12 LINEAR INTERCONNECT NETWORK BUS 3 LO SPD GMLAN SER DATA LOGIC DRIVER WINDOW MOTOR LOGIC DRIVER WINDOW SWITCH LOGIC INSTRUMENT CLUSTER LOGIC PASSENGER WINDOW MOTOR MEDIA DISC PLAYER MOST CTRL MOST SER DATA (+) NETWORK BUS 10 RADIO RED/WHT WIRE RIGHT STEERING WHEEL CONTROLS SWITCH STEERING WHEEL AIR BAG COIL W/ PREMIUM AUDIO SPEAKER SYSTEM W/ REAR SEAT ENTERTAINMENT W/O PREMIUM AUDIO SPEAKER SYSTEM W/O REAR SEAT ENTERTAINMENT WHT/GRN WIRE WHT/VIO WIRE

4 2 NETWORK BUS 9 LO SPD GMLAN SERIAL DATA BLU/YEL WIRE BREAKOUT TO INLINE TO DRIVER SEAT HARNESS) GRN WIRE GRN/WHT WIRE GRN/YEL WIRE HVAC CONTROL MODULE HVAC CONTROLS KEYLESS ENTRY CONTROL MODULE (W/ KEYLESS ENTRY ENGINE START SWITCH) LO SPD GMLAN SERIAL DATA LOGIC PASSENGER WINDOW SWITCH NETWORK BUS 8 NETWORK BUS 9 OUTSIDE REARVIEW MIRROR SWITCH PACKAGE SHELF) PASSENGER PRESENCE DETECTION MODULE (W/ CHILD PRESENCE DETECTOR) (UNDER FRONT PASSENGER'S SEAT) REAR PARKING ASSIST CONTROL MODULE (IF EQUIPPED) (CENTER OF REAR RIGHT SIDE OBJECT SENSOR MODULE (BEHIND RIGHT REAR WHEEL) SEAT MEMORY CONTROL MODULE (IF EQUIPPED) (UNDER DRIVER'S SEAT)