Buick LaCrosse II facelift (2013-2016) engine control module Wiring diagrams

2.4L AUTOMATIC TRANSMISSION ASSEMBLY CONTROL SOLENOID VALVE ASSEMBLY BATTERY BATTERY CURRENT SENSOR BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE ELECTRIC/ AUXILIARY TRANSMISSION FLUID PUMP ENGINE CONTROL MODULE IGNITION COIL 1 IGNITION COIL 2 IGNITION COIL 3 IGNITION COIL 4 IGNITION COIL 5 IGNITION COIL 6 LEFT FRONT STRUT TOWER) MASS AIR FLOW/INTAKE AIR TEMPERATURE SENSOR MULTI-FUNCTION INTAKE AIR SENSOR SECONDARY AIR INJECTION PUMP STARTER RELAY STARTER/ GENERATOR CONTROL MODULE W/ CALIFORNIA EMISSION SYSTEM WINDSHIELD WIPER MOTOR WINDSHIELD WIPER RELAY

2.4L 3.6L ABS PUMP FUSE ABS WDO FRT VALVE FUSE FUSE AFL MTR FUSE AMPLIFIER FUSE AUDIO AMPLIFIER (IF EQUIPPED) AUXILIARY HEATER COOLANT PUMP RELAY BATT RVC FUSE BCM 6 FUSE BATTERY BATTERY FUSE BLOCK (TOP OF BATTERY) BODY CONTROL MODULE BPIM BATT VES FUSE BRAKE BOOSTER PUMP MOTOR RELAY BRK VAC PUMP FUSE BRN WIRE CANN VENT FUSE CHASSIS CONTROL MODULE CONTROL SOLENOID VALVE ASSEMBLY AUTOMATIC TRANSMISSION ASSEMBLY ECM BATT FUSE ELECTRONIC BRAKE CONTROL MODULE ELECTRONIC DRIVER BRAKE WINDOW CONTROL MOTOR MODULE ENGINE CONTROL MODULE EPB FUSE EVAPORATIVE EMISSION VENT SOLENOID VALVE FRONT SEAT HEATING CONTROL MODULE FSCM FUSE FUEL PUMP DRIVER CONTROL MODULE FUSE FUSE 2 FUSE 3 FUSE 4 FUSE 5 FUSE 6 GENERATOR GRN WIRE GRY WIRE HEADLAMP CONTROL MODULE (IF EQUIPPED) HTD ST DR FUSE KEYLESS ENTRY CONTROL MODULE LEFT HEADLAMP ASSEMBLY LEFT HEADLAMP HORIZONTAL MOTOR MEM ST FUSE MGU CLT PMP FUSE PARKING BRAKE CONTROL MODULE PASSENGER LEFT REAR WINDOW WINDOW SWITCH MOTOR PEPS FUSE POWER STEERING CONTROL MODULE (W/ BELT DRIVE) POWER STEERING CONTROL MODULE (W/ VARIABLE EFFORT) POWER STEERING CONTROL MODULE (W/O VARIABLE EFFORT OR BELT DRIVE) RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE RED/YEL WIRE RIGHT HEADLAMP ASSEMBLY RIGHT HEADLAMP HORIZONTAL MOTOR RIGHT REAR WINDOW SWITCH SEAT MEMORY CONTROL MODULE STARTER FUSE STARTER MOTOR STARTER RELAY STARTER/GENERATOR CONTROL MODULE HYBRID/EV BATTERY PACK SUNROOF CONTROL MODULE (IF EQUIPPED) SUNROOF FUSE SUNROOF SUNSHADE MOTOR MODULE (IF EQUIPPED) TCM BATT FUSE TO IGNITION MAIN RELAY (DIAGRAM 2 OF 5) AFL BATT FUSE TO INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 2 OF 5) TO INSTRUMENT PANEL FUSE BLOCK (DIAGRAM 3 OF 5) TRANSMISSION CONTROL MODULE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO RED/ WIRE W/ FRONT ACTIVE GRILLE SHUTTERS W/O FRONT ACTIVE GRILLE SHUTTERS W/ PASSIVE KEYLESS ENTRY W/ POWER W/O POWER STEERING STEERING CONTROL CONTROL WDO RR FUSE

3 OF 5) A/C CLUTCH FUSE A/C COMPRESSOR CLUTCH RELAY ACTIVE GRILLE AIR SHUTTER ACTUATOR (IF EQUIPPED) AIR QUALITY SENSOR (IF EQUIPPED) AUXILIARY BLOWER MOTOR CONTROL MODULE AUXILIARY HEATER COOLANT PUMP RELAY (2.4L) BCM 1 AIR BAG FUSE FUSE BCM 2 FUSE BDY RC IGN FUSE BLK WIRE BODY CONTROL MODULE BPIM IGN FUSE CABIN HTR COOL PMP FUSE COOL COOLING FAN HIGH SPEED RELAY DISPLAY FUSE DLIS DLC FUSE FUSE ECM FUSE ECM IGN FUSE IP RC IGN FUSE ENGINE CONTROL MODULE ENGINE CONTROLS IGNITION RELAY ENGINE HVAC CONTROL CONTROL MODULE MODULE FROM AFL BATT FUSE (DIAGRAM 1 OF 5) FROM BATTERY FUSE BLOCK (DIAGRAM 1 OF 5) FROM BODY CONTROL MODULE (DIAGRAM 5 OF 5) FROM MGU CLT PUMP FUSE (DIAGRAM 2 OF 5) FRONT FOG LAMP RELAY FRT WIPER FUSE FUSE GRN/VIO WIRE GRY WIRE HEADLAMP HIGH BEAM RELAY HEADLAMP LOW BEAM RELAY REAR DEFOGGER RELAY HORN RELAY HVAC TO CONTROL ACCESSORY MODULE DC/AC POWER INVERTER MODULE (DIAGRAM 3 OF 5) HVAC/ ACDC INV FUSE CNTRL FUSE IGNITION IGNITION COIL 2 COIL 4 IGNITION COIL 6 IGNITION MAIN RELAY INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE INJ EVEN FUSE INSIDE REARVIEW REARVIEW MIRROR CAMERA INSTRUMENT CLUSTER INSTRUMENT PANEL FUSE BLOCK (LOWER LEFT SIDE OF DASH) IPC FUSE MGU CLT PUMP FUSE MIL IGN FUSE OF BATTERY) PASSENGER AIR BAG DISABLED INSTRUMENT INDICATOR CLUSTER PASSENGER PRESENCE MODULE PUMP RELAY (DIAGRAM 2 OF 5) REAR HVAC/ BLWR FUSE RED WIRE RED/BLK WIRE RED/BLU WIRE RED/BRN WIRE RED/GRN WIRE RED/GRY WIRE RED/VIO WIRE RED/WHT WIRE SAIR PUMP FUSE SAIR SOL FUSE SECONDARY AIR INJECTION PUMP RELAY (2.4L CALIFORNIA) SECONDARY AIR INJECTION SOLENOID VALVE RELAY (2.4L CALIFORNIA) START/ GENERATOR COOLANT PUMP RELAY (2.4L) STARTER/ GENERATOR CONTROL MODULE HYBRID/ EV BATTERY PACK TO IGNITION DATA LINK SWITCH CONNECTOR (DIAGRAM 5 OF 5) TO LOGIS/MODE FUSE (DIAGRAM TO MIR EWL FR FUSE (DIAGRAM 5 OF 5) TO SEAT MASS FUSE (DIAGRAM 4 OF 5) TO SPLICE TO WINDSHIELD WASHER TRANS AUX PUMP FUSE UNDERHOOD FUSE BLOCK (LEFT SIDE UNDERHOOD FUSE BLOCK (LEFT SIDE OF BATTERY) VIO WIRE VIO/BLK WIRE VIO/BLU WIRE VIO/GRN WIRE VIO/GRY WIRE VIO/WHT WIRE WHT WIRE WINDSHIELD WINDSHIELD WIPER WASHER RELAY PUMP RELAY WINDSHIELD WIPER SPEED CONTROL RELAY

ACC WAKEUP SERIAL DATA BLK WIRE BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRN WIRE BLK/LT GRN WIRE BLK/YEL WIRE BLU WIRE BLU/BRN WIRE BLU/VIO WIRE BLU/WHT WIRE BRAKE PEDAL POSITION SENSOR (NEAR TOP OF ACCELERATOR PEDAL ASSEMBLY) BRAKE POSITION SNSR LO REF BRN/RED WIRE BRN/WHT WIRE CHARGING SYSTEM COMPUTER COMPUTER DATA LINES SYSTEM CONTROL SYSTEM COOLING CRUISE CRUISE/ETC/TCC BRAKE SIG DATA COMM ENABLE DATA LINES DK BLU WIRE DK BLU/BRN WIRE DK BLU/GRN WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE ECM (LEFT FRONT OF ENGINE COMPT) ENGINE CONTROL MODULE EVAP CANISTER VENT SOL CTRL FANS SYSTEM FLP SENS LOW REF FPP RLY CTRL FRP SNSR (5) VOLT REF FRP SNSR SIG FUEL PUMP SPLY VOLT FUEL RAIL PRESSURE SENSOR (TOP OF ENGINE ON FUEL RAIL) GRN/GRY WIRE GRN/VIO WIRE GROUND GRY WIRE GRY/BLK WIRE GRY/DK BLU WIRE HI SIG BANK 1 SENS (1) HI SIG BANK 1 SENS (2) HI SIG BANK 2 SENS 1 HI SIG BANK 2 SENS 2 HOT AT ALL TIMES BATTERY FUSE BLOCK (TOP OF BATTERY) FUSE 5 HUMIDITY SNSR SIG IGNITION 1 VOLTAGE LO SIG BANK 1 SENS 1 LO SIG BANK 1 SENS 2 LO SIG BANK 2 SENS 1 LO SIG BANK 2 SENS 2 LO SPD C/FAN RLY CTRL LOW REF LT GRN/DK BLU WIRE NCA WIRE POWERTRAIN RLY COIL CTRL PRESS SENS SIG PWR MAIN RLY FUSED SPLY (2) PWR MAIN RLY FUSED SPLY 3 RED WIRE RED/BRN WIRE RED/VIO WIRE RELAY COIL CTRL RUN/CRNK IGN 1 VOLT SERIAL DATA SHIELD EXTENSION SHUTTER VALVE SOL CTRL SNSR LO REF SNSR SIG STARTER ENABLE RLY CTRL STARTING/ SUPPLY VOLT SYSTEM TAN WIRE THROTTLE ACTUATOR CTRL CLOSE VIO/BLK WIRE VIO/DK BLU WIRE VIO/GRY WIRE VIO/LT GRN WIRE VIO/WHT WIRE VIO/YEL WIRE WHT WIRE WHT/BLK WIRE WHT/BLU WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/GRN WIRE WHT/RED WIRE WHT/YEL WIRE YEL WIRE YEL/DK BLU WIRE YEL/WHT WIRE

A/C COMPRESSOR CLUTCH RELAY AUXILIARY HEATER COOLANT PUMP RELAY AUXILIARY/ ELECTRIC TRANSMISSION FLUID PUMP RELAY BLK/BRN WIRE BLK/DK BLU WIRE BLK/GRY WIRE BLK/LT GRN WIRE BLK/VIO WIRE BLK/WHT WIRE BLK/YEL WIRE BLU/WHT WIRE BRN WIRE BRN/GRN WIRE BRN/RED WIRE BRN/WHT WIRE CHARGE INDICATOR CTRL COOLING FAN LOW SPEED RELAY DK BLU WIRE DK BLU/BRN WIRE DK BLU/GRY WIRE DK BLU/WHT WIRE DK BLU/YEL WIRE ECM (LEFT FRONT OF ENGINE COMPT) ENGINE CONTROL MODULE EVAP CANISTER PURGE SOL CTRL FAN RLY A FROM ENGINE CONTROLS IGNITION RELAY (DIAGRAM 3 OF 7) FUSE GEN FIELD DUTY CYCLE SIG GRY WIRE GRY/DK BLU WIRE GRY/RED WIRE GRY/WHT WIRE HI VOLT SPLY CYL 1 HI VOLT SPLY CYL 2 HI VOLT SPLY CYL 3 HI VOLT SPLY CYL 4 HI VOLT SPLY CYL 5 HI VOLT SPLY CYL 6 HOT AT ALL TIMES INDUCTION AIR TEMP SNSR SIG INTAKE AIR TEMP SNSR LO REF KNOCK SNSR LO REF (1) KNOCK SNSR LO REF (2) KNOCK SNSR SIG (1) KNOCK SNSR SIG (2) LO CTRL BANK 1 SNSR (1) LO CTRL BANK 1 SNSR (2) LO CTRL BANK 2 SNSR (1) LO CTRL BANK 2 SNSR (2) LT GRN/DK BLU WIRE LT GRN/GRY WIRE LT GRN/WHT WIRE LT GRN/YEL WIRE MAP SNSR LO REF MAP SNSR SIG MASS AIR FLOW SNSR SIG RED/GRN WIRE RED/LT GRN WIRE SAIR SOL FUSE SECONDARY AIR INJECTION SOLENOID VALVE RELAY SIGNAL GROUND STARTING/ CHARGING SYSTEM SW SIG THROTTLE ACTUATOR CTRL OPEN THROTTLE POSITION SNSR THROTTLE SENS LO REF TR PARK/NEUTRAL SIG (1) TRANS- MISSIONS SYSTEM VIO/DK BLU WIRE VIO/GRY WIRE WHT WIRE WHT/BRN WIRE WHT/DK BLU WIRE WHT/GRY WIRE YEL WIRE