Buick LeSabre VIII (2000-2005) powertrain control module (pcm) (in air cleaner housing) Wiring diagrams

17 1807 885 882 PPL 1764 716 STEERING WHEEL POS YAW RATE SENS ABS FUSE ABS IND SIG ABS INDICATOR BASE MODEL BLK WIRE BLK/WHT WIRE BRAKE PRESSURE MODULATOR VALVE BREAKOUT) BRN WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DRIVER INFORMATION CENTER (DIC) ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT FRONT OF ENGINE COMPARTMENT) GRY WIRE GRY/BLK WIRE HEATER-A/C CONTROL HOT AT ALL TIMES HOT IN INSTRUMENT PANEL CLUSTER INSTRUMENT PANEL MODULE (IPM) LATERAL ACCELEROMETER SENSOR (UNDER LEFT REAR SEAT) LEFT FRONT WHEEL SPEED SENSOR LEFT REAR WHEEL SPEED SENSOR LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE NCA WIRE ORG/ WIRE ORG/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL PPL PUMP MOTOR REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RED WIRE RIGHT FRONT WHEEL SPEED SENSOR RIGHT REAR WHEEL SPEED SENSOR RUN WIRE SERIAL DATA CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA CLASS 2 TRAC CTRL SW SPLICE PACK STEERING WHEEL POSITION SENSOR (SWPS) (ON BASE OF STEERING COLUMN) STOP LAMP SWITCH (ON BRAKE PEDAL BRACKET) STOP LP FUSE TAN WIRE TAN/BLK WIRE TORQUE DELIVERED STEERING WHEEL POS TRAC CTRL SW TRACTION CONTROL SWITCH TRACTION CONTROL SYSTEM ACTIVE TRACTION OFF INDICATOR UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) ABS FUSE UPLEVEL MODEL VARIABLE EFFORT STEERING ACTUATOR (ON LEFT SIDE OF POWER STEERING GEAR) WHT WIRE YAW RATE SENSOR (UNDER REAR SHELF, BEHIND LID HINGE) YEL WIRE

26 39 27 35 34 ECT SENS SIG CLUTCH RLY CTRL SENSOR SIGNAL SENSOR GRD A/C CLU RELAY 32 A/C COMPRESSOR CLUTCH DIODE A/C COMPRESSOR CLUTCH A/C REFRIGERANT PRESSURE SENSOR (BEHIND A/C COMPRESSOR, ON A/C LINE) BLK WIRE BLK/WHT WIRE BLOWER CONTROL PROCESSOR (AT RIGHT FRONT SIDE OF BLOWER MOTOR) BLOWER MOTOR (UNDER RIGHT SIDE OF DASH, ABOVE SOUND INSULATOR) BLWR SP INPUT BATTERY GRD BLWR MTR GRD SPEED CNTL BLWR VOLT BRN WIRE CNTL SIG COMPUTER DATA LINES SYSTEM COOL FAN 1 FUSE 47 COOL FAN 2 FUSE 46 COOLFAN 1 (LOW SPEED) RELAY 40 COOLFAN 2 (HIGH SPEED) RELAY 37 COOLFAN S/P RELAY 39 DASH INTEGRATION MODULE (DIM) (BEHIND RIGHT SIDE OF DASH, UNDER SOUND INSULATOR) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROLS SYSTEM ENGINE COOLANT TEMPERATURE SENSOR (ON REAR OF ENGINE, NEAR THERMOSTAT HOUSING) GROUND GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN ON INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL LEFT COOLING FAN LT BLU WIRE ORG/ WIRE PASSENGER TEMPERATURE CONTROL ASSEMBLY PDM LOW SIDE INPUT PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL PPL RED/BLK WIRE RIGHT COOLING FAN RIGHT SIDE STEERING WHEEL CONTROLS SOUND SYSTEMS SPLICE PACK STEERING COLUMN FUSE HOLDER SUPPLY SW GRD SWITCH FUSE TAN WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) A/C CLU FUSE 26 WHT WIRE YEL WIRE

39 27 35 34 CLUTCH RLY CTRL SENSOR SIGNAL LOW REF A/C CLU FUSE 26 A/C CLU RELAY 32 A/C COMPRESSOR CLUTCH A/C COMPRESSOR CLUTCH DIODE (NEAR A/C COMPRESSOR) A/C REFRIGERANT PRESSURE SENSOR (BEHIND A/C COMPRESSOR, ON A/C LINE) BLK WIRE COMPUTER DATA LINES SYSTEM DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROLS SYSTEM GRY WIRE HOT AT ALL TIMES HOT IN ON POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL 1807 1807 58 59 CLASS 2 SERIAL CLASS 2 SERIAL RED/BLK WIRE SPLICE PACK UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPARTMENT)

BLK WIRE COOL FAN 1 FUSE 47 COOL FAN 2 FUSE 46 COOLFAN 1 RELAY 40 COOLFAN 2 RELAY 37 COOLFAN S/P RELAY 39 DK BLU WIRE DK GRN WIRE ECT SENS SIG GRY WIRE HI FAN CTRL HOT AT ALL TIMES LEFT COOLING FAN LOW FAN CTRL LOW REF LT BLU WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) RIGHT COOLING FAN SPLICE PACK UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE

55 72 64 VEHICLE SPEED OUT DISABLE OUTPUT VSS HIGH ABS/TCC SWITCH (NEAR BRAKE PEDAL) BLK WIRE CR CONT FUSE CRUISE CONTROL MODULE (ON LEFT SIDE OF ENGINE COMPT, ON STRUT TOWER) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGAGED INPUT GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN ON, START IGN 1 FUSE INFLATABLE RESTRAINT STEERING WHEELS MODULE COIL LEFT STEERING WHEELS CONTROLS LT BLU/BLK WIRE NCA WIRE ORG/ WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL PPL PPL VSS LOW REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RESUME/ ACCEL RIGHT STEERING WHEELS CONTROLS SET/ COAST SPLICE PACK STEERING COLUMN FUSE HOLDER STOP LP FUSE STOPLAMP SWITCH (ON BRAKE PEDAL BRACKET) TRANSMISSION SYSTEM UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE) WHT WIRE YEL WIRE

BATTERY BLK WIRE BLK/WHT WIRE BRN WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SYSTEM INSTRUMENT CLUSTER SYSTEM DIMMING DIMMING SIGNAL DK BLU WIRE DK GRN/WHT WIRE GROUND HEAD-UP DISPLAY (HUD) DIMMER SWITCH HEAD-UP DISPLAY (ON TOP LEFT SIDE OF DASH) HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE IGN 3 FUSE IGNITION IMAGE DOWN IMAGE UP INSTRUMENT CLUSTER CIRCUIT LF TURN SIGNAL LT BLU WIRE MOTOR DOWN FEED MOTOR UP FEED ORG/ WIRE PASS THROUGH GROMMET) POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL DATA LINES PPL/WHT WIRE REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RF TURN SIGNAL VEHICLE SPEED SIGNAL YEL WIRE

ABS IND CONTROL ABS IND. AIRBAG IND AIRBAG IND CONTROL BLK WIRE BLK/WHT WIRE BRAKE FLUID LEVEL SWITCH (IN MASTER CYLINDER RESERVOIR) BRAKE IND BRAKE IND CONTROL BRN/WHT WIRE CHECK OIL LEVEL IND CHECK OIL LEVEL IND CONTROL COMPUTER DATA LINES SYSTEM COOLANT TEMP IND COOLANT TEMP IND CONTROL CRUISE CONTROL SYSTEM CRUISE IND CRUISE IND CONTROL DATA LINES DATA LINES DK (BODY HARN, LEFT SIDE OF VEHICLE, 19.5 CM FROM PASS THROUGH GROMMET) DK (DASH HARN, 23.5 CM FROM INSTRUMENT CLUSTER PANEL) DK BLU WIRE DK GRN/WHT WIRE DRIVER INFORMATION CENTER (DIC) SWITCH ELECTRONIC BRAKE CONTROL MODULE (EBCM) (ON LEFT FRONT OF ENGINE COMPT) ENG/ MET FUEL GAUGE FUEL INFO GAUGE INFO GRN WIRE GROUND GROUND IGNITION BATTERY HEAD-UP DISPLAY CIRCUIT HI BEAM IN CONTROL HIGH BEAM IND HOT AT ALL TIMES HOT IN RUN OR START I/P FUSE IGN 1 FUSE ILLUMINATION INSTRUMENT CLUSTER LEFT TURN LEFT TURN IND LT BLU WIRE MIL CONTROL ODO TRIP OIL PRESSURE IND OIL PRESSURE IND CONTROL ORG/ WIRE PARK BRAKE SWITCH (ON TOP OF PARK BRAKE PEDAL ASSEMBLY) PNK WIRE PNK/BLK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL/ PPL/ PPL/ REAR FUSE BLOCK (UNDER LEFT REAR SEAT) RESET+ RIGHT TURN RIGHT TURN IND RIGHT TURN LEFT TURN IGNITION SEAT BELT IND SEAT BELT IND CONTROL SECURITY IND SECURITY IND CONTROL SERVICE ENGINE SOON IND SPEEDOMETER GAUGE TACH SIGNAL TACHO- METER TAN WIRE TEMPERATURE GAUGE TRACTION OFF IND TRACTION OFF IND CONTROL TRACTION ON IND UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPT) VOLT IND VOLT IND CONTROL VSS SIGNAL WHT WIRE WINDSHIELD WASHER FLUID LEVEL SWITCH (IN WINDSHIELD WASHER FLUID RESERVOIR) YEL WIRE

26 39 27 35 34 ECT SENS SIG CLUTCH RLY CTRL SENSOR SIGNAL LOW REF A/C CLU RELAY 32 A/C COMPRESSOR CLUTCH DIODE (NEAR A/C COMPRESSOR) A/C COMPRESSOR CLUTCH A/C REFRIGERANT PRESSURE SENSOR (BEHIND A/C COMPRESSOR, ON A/C LINE) BLK WIRE COMPUTER DATA LINES SYSTEM COOL FAN 1 FUSE 47 COOL FAN 2 FUSE 46 COOLFAN 1 (LOW SPEED) RELAY 40 COOLFAN 2 (HIGH SPEED) RELAY 37 COOLFAN S/P RELAY 39 DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROLS SYSTEM GRY WIRE HOT AT ALL TIMES HOT IN ON LEFT COOLING FAN MOTOR LT BLU WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL RED/BLK WIRE RIGHT COOLING FAN MOTOR SPLICE PACK UNDERHOOD FUSE BLOCK (RIGHT FRONT SIDE OF ENGINE COMPARTMENT) A/C CLU FUSE 26 WHT WIRE YEL WIRE

1744 808 FUEL INJ 1 CONTROL SENSOR RETURN (EOP) 400 401 PPL ANTI-LOCK BRAKE SYSTEM 43 44 FUEL INJ 6 CONTROL SHIFT SOL B CONTROL 46 47 48 FUEL INJ 4 CONTROL FUEL INJ 5 CONTROL REFERENCE LOW 772 492 TRANS RANGE SW B MAF SENSOR INPUT BLK WIRE BLK/WHT WIRE BLU WIRE BONNEVILLE LE SABRE BRN/WHT WIRE BYPASS CKP SYNC SIG CMP OUTPUT CMP SIGNAL COMPUTER DATA LINES SYSTEM COOLING FANS SYSTEM CRUISE CONTROL SYSTEM DESIRED TORQUE INPUT CRUISE DISABLE/INHIBIT FUEL INJ 2 CONTROL DIS FUSE DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/ WHT WIRE DK GRN/WHT WIRE ECT SENSOR GROUND MAP SENSOR GROUND GROUND GRY WIRE HOT AT ALL TIMES HOT IN RUN, START IAC COIL B HIGH 39 40 41 42 IGN CONTROL IGN VOLTAGE IGNITION IGNITION BATTERY IGNITION CONTROL MODULE (ICM) (ON TOP LEFT FRONT OF ENG) IGNITION SWITCH (PIGTAILED FOR LE SABRE) INSTRUMENT CLUSTER SYSTEM (VEHICLE SPEED) KNOCK SENSOR (KS) BANK 2 (ON LOWER REAR OF ENG BLOCK, NEAR OIL FILTER) LOCK OFF LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE MAP SENSOR +5 V MASS AIRFLOW (MAF) SENSOR (TOP OF THROTTLE BODY) NOT USED ORG/ WIRE ORG/BLK WIRE PCM GROUND IAT SENSOR GROUND PNK (OR PNK) WIRE PNK (OR PNK/BLK) WIRE PNK PNK 9 10 WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL PPL PPL TCC SWITCH INPUT EGR POS SENS GROUND EGR CONTROL GROUND PPL/WHT WIRE PURGE SOLENOID (TOP OF ENGINE) RED/BLK WIRE REF LOW RUN WIRE SHIFT SOL A CONTROL HI SPEED COOL FAN LO SPEED COOL FAN CMP INPUT TAN WIRE TAN/BLK WIRE TRANS FUSE UNDER- HOOD FUSE BLOCK PCM BATT FUSE VEHICLE SPEED SENSOR (RIGHT FRONT OF TRANSAXLE) EVAPORATIVE EMISSIONS CANISTER WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

5 VOLT REFERENCE A 5 VOLT REFERENCE A 5 VOLT REFERENCE B SENSOR GROUND A/C COMP RELAY CONTROL A/C SYSTEM A/T FLUID TEMP INPUT FUEL LEVEL INPUT ANTI-LOCK BRAKE SYSTEM BLK WIRE BLK/WHT WIRE BOOST CONTROL SOLENOID (VIN 1) BRN WIRE BRN/WHT WIRE CRUISE CONTROL SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENG OIL LEVEL SW INPUT CRUISE STATUS BRAKE PEDAL SW OUT GEN TERM L CONTROL ENGINE COOLANT TEMPERATURE (ECT) SENSOR EVAP SOLENOID CONTROL FUEL PUMP RELAY CONTROL EGR VALVE CONTROL MIL CONTROL EVAPORATIVE EMISSIONS (EVAP) CANISTER VENT VALVE FUEL INJ 3 CONTROL FUEL TANK PRESS SENSOR TRANS RANGE SW C INPUT FUEL TANK SENDER GRY (OR GRY/BLK) WIRE GRY WIRE HEATED OXYGEN BANK 1 SENSOR 1 (IN RIGHT EXHAUST MANIFOLD) HEATED OXYGEN BANK 1 SENSOR 2 (REAR OF CATALYTIC CONVERTER) HOT IN RUN AND START HOT IN RUN, START IAC COIL A HIGH TACH SIGNAL DELIVERED TORQUE CONTROL IAC COIL A LOW PRESS SOL HIGH CONTROL PRESS SOL LOW CONTROL IAC COIL B LOW IAT SENSOR INPUT IDLE AIR CONTROL (IAC) VALVE (ON THROTTLE BODY ASSEMBLY) IGN 1 FUSE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE LT GRN/WHT WIRE NCA WIRE OIL PRESSURE SIGNAL OXY SEN FUSE PCM IGN FUSE PNK (OR PNK/BLK) WIRE PNK 1 2 3 4 5 6 7 8 9 10 11 12 WIRE PNK WIRE PNK/BLK WIRE PNK/WHT WIRE POWERTRAIN CONTROL MODULE (PCM) (IN AIR CLEANER HOUSING) PPL PPL PPL REAR FUSE BLOCK RED WIRE RED/BLK WIRE STARTER RELAY OUTPUT BOOST SOLENOID CONTROL TCC PWM SOL CONTROL 1724 418 STARTING/CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TOP OF TRANSMISSION) TRANS RANGE SW A INPUT TRANS TCC RELEASE SW IN UNDER- HOOD FUSE BLOCK VENT SOL FUSE WHT WIRE YEL WIRE YEL/BLK WIRE