Cadillac XLR I (2003-2009) engine control module (ecm) (lower right rear of engine compt) Wiring diagrams

11 6 VEHICLE SPEED SIGNAL HUD CLASS 2 SERIAL DATA 2500 2501 COMPUTER DATA LINES SYSTEM 5 1 PNK WIRE 5 VOLT REF 53 33 SERIAL DATA BUS + SERIAL DATA BUS - ACCELERATION PEDAL POSITION (APP) SENSOR (TOP OF ACCELERATOR PEDAL ASSEMBLY) AUTOMATIC TRANSMISSION AUXILIARY PW RLY COIL SUPPLY VOLTAGE BATTERY POSITIVE VOLTAGE BLK TAN/ WIRE BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND RIGHT RIGHT SIDE OF DASH) BRAKE PEDAL POSITION SWITCH SIGNAL BRN WIRE COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE CTRL SET/COAST, RESUME/ ACCEL SW SIGNAL DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LOWER RIGHT REAR OF ENGINE COMPT) FUSE GAP ADJUST SWITCH SIGNAL GRN WIRE GROUND GRY WIRE HEADS UP DISPLAY (HUD) (TOP LEFT SIDE OF DASH) HIGH SPEED GMLAN SERIAL DATA BUS + HIGH SPEED GMLAN SERIAL DATA BUS - HOT AT ALL TIMES HUD MESSAGE CENTER CRUISE SPEED SET XXX INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (IN STEERING WHEEL) INPUT/OUTPUT SPEED SENSORS (ISS/OSS) ASSEMBLY LOGIC LOGIC INSTRUMENT PANEL CLUSTER (IPC) LOW REF LT BLU WIRE MESSAGE REQUEST NCA WIRE OFF RESUME/ ACCEL + OSS SIGNAL BATT + VOL ISS SIGNAL PNK (NOT USED) WIRE PNK WIRE PPL RADIO RED WIRE RED/WHT WIRE SET/COAST STOP LAMP SWITCH SIGNAL SWITCH SIGNAL DATA BUS - DATA BUS + ISS SIGNAL BATT + VOL OSS SIGNAL TAN WIRE TAN/BLK WIRE TEHC MODULE ASSEMBLY THROTTLE ACTUATOR CONTROL (TAC) MOTOR THROTTLE BODY ASSEMBLY (TOP OF ENGINE, AT INTAKE MANIFOLD) THROTTLE POSITION (TP) SENSOR TURN SIGNAL/ MULTIFUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT REAR OF ENGINE COMPT) VEHICLE SPEED SIGNAL WHT WIRE WHT/ BLK WIRE WHT/BLK WIRE YEL WIRE

5 1 PNK WIRE 5 VOLT REF 53 33 SERIAL DATA BUS + SERIAL DATA BUS - 6 10 11 SWITCH SIGNAL DATA BUS - DATA BUS + ISS SIGNAL BATT + VOL OSS SIGNAL ACC/ TCM FUSE ADAPTIVE CRUISE CONTROL MODULE (ACM) (CENTER OF VEHICLE) ALERT DISTANCE CRUISE SPEED LIMITED FOLLOW DISTANCE SET SPEED SET XX MPH AUTOMATIC TRANSMISSION BCM HIGH SPEED GMLAN SERIAL DATA BUS + BLK TAN/ WIRE BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND RIGHT SIDE OF DASH) BRAKE PEDAL POSITION SWITCH SIGNAL BRN WIRE CAN-BUS CAN-BUS COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE CTRL SET/COAST, RESUME/ ACCEL SW SIGNAL DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LOWER RIGHT REAR OF ENGINE COMPT) FORWARD LOOKING SENSOR (FLS) GRN WIRE GROUND GRY WIRE HOT AT ALL TIMES HOT W/ RUN/CRANK RELAY ENERGIZED IN ENGINE COMPT, ON UPPER RIGHT FRAME RAIL, INFLATABLE RESTRAINT STEERING WHEEL MODULE COIL (IN STEERING WHEEL) INPUT/OUTPUT SPEED SENSORS (ISS/OSS) ASSEMBLY LOGIC BCM HIGH SPEED GMLAN SERIAL DATA BUS - LOGIC HUD CLASS 2 SERIAL DATA LOGIC HUD CLASS 2 SERIAL DATA VEHICLE SPEED SIGNAL LOW REF LT GRN/BLK WIRE MESSAGE CENTER INSTRUMENT PANEL CLUSTER (IPC) MESSAGE REQUEST MESSAGE REQUEST B+ NCA WIRE OFF RESUME/ ACCEL + OSS SIGNAL BATT + VOL ISS SIGNAL PNK 1 5 2 4 3 IGN 1 BATT GND CAN BUS + CAN BUS - WIRE PNK IGN 1 VOLT BATT POSITIVE VOLT WIRE PNK WIRE POWER DISTRIBUTION SYSTEM PPL RADIO 39 7 VEHICLE SPEED SIG STOP LAMP SW SIG RED WIRE RED/WHT WIRE RUN/ CRANK RELAY RUN/ CRANK RLY CTRL SERIAL DATA BUS (+) SERIAL DATA BUS (-) SET/COAST SPLICE PACK STEERING WHEEL CONTROL SWITCH ASSEMBLY TAN WIRE TAN/BLK WIRE TAN/WHT WIRE TEHC MODULE ASSEMBLY THROTTLE ACTUATOR CONTROL (TAC) MOTOR THROTTLE BODY ASSEMBLY (TOP OF ENGINE, AT INTAKE MANIFOLD) THROTTLE POSITION (TP) SENSOR TIGHT CURVE HUD MESSAGE CENTER HEADS UP DISPLAY (HUD) (TOP LEFT SIDE OF DASH) TURN SIGNAL/ MULTIFUNCTION SWITCH TUTD SW/ STRG COL SW FUSE ACCA/DRIV DR SW FUSE UNDERHOOD FUSE BLOCK (RIGHT REAR OF ENGINE COMPT) VEHICLE SPEED SIGNAL WHT WIRE YEL WIRE

BLK WIRE BODY CONTROL MODULE (BCM) (BEHIND RIGHT SIDE OF DASH) BRAKE PEDAL POSITION SENSOR (BEHIND LOWER LEFT SIDE OF DASH) BRAKE PRESSURE MODULATOR VALVE (BPMV) BRK POS SENS SIG BRN WIRE BRN/WHT WIRE CLASS 2 SERIAL DATA COMPUTER DATA LINES SYSTEM DATA BUS (+) GMLAN SERIAL DATA BUS - ELECTRONIC BRAKE CONTROL MODULE (EBCM) (LEFT FRONT OF ENGINE COMPT) ENGINE CONTROL MODULE (ECM) (LOWER RIGHT REAR OF ENGINE COMPT) ENGINE CONTROLS SYSTEM FROM ELECTRONIC BRAKE CONTROL MODULE, PIN E (DIAGRAM 1 OF 2) GMLAN SERIAL GMLAN SERIAL DATA BUS + GRY WIRE GRY/BLK WIRE LF INLET SOLENOID VALVE LF ISOLATION SOLENOID VALVE LF OUTLET SOLENOID VALVE LF PRIME SOLENOID VALVE LOGIC LOW REF LR INLET SOLENOID VALVE LR OUTLET SOLENOID VALVE LT GRN WIRE MOTOR CTRL RF INLET SOLENOID VALVE RF ISOLATION SOLENOID VALVE RF OUTLET SOLENOID VALVE RF PRIME SOLENOID VALVE RR INLET SOLENOID VALVE RR OUTLET SOLENOID VALVE SPLICE PACK STOP LAMP SW SIG STOP LMP SW SIG TAN WIRE TAN/BLK WIRE TRAC CTRL SW SIG TRACTION CONTROL SWITCH UNDERHOOD FUSE BLOCK (RIGHT REAR OF ENGINE COMPT) WHT WIRE

40 53 RLY CTRL RLY CTRL A/C COMP FUSE 15 A/C COMP RELAY 35 A/C COMPRESSOR CLUTCH (LOWER RIGHT FRONT OF ENGINE) BLK WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LOWER RIGHT REAR OF ENGINE COMPT) HOT AT ALL TIMES IGN 1 RELAY 44 SPLICE PACK UNDERHOOD FUSE BLOCK (RIGHT REAR OF ENGINE COMPT) WHT/BLK WIRE

10 11 14 13 GMLAN DATA BUS + GMLAN DATA BUS - GMLAN DATA BUS + GMLAN DATA BUS - 2 5 3 4 GMLAN DATA BUS - GMLAN DATA BUS + GMLAN DATA BUS - GMLAN DATA BUS + 3 2 GMLAN DATA BUS - GMLAN DATA BUS + 33 53 GMLAN DATA BUS - GMLAN DATA BUS + 4.4L, 4.6L 40 22 21 39 GMLAN DATA BUS - GMLAN DATA BUS + GMLAN DATA BUS + GMLAN DATA BUS - 8 9 24 23 GMLAN DATA BUS - GMLAN DATA BUS + GMLAN DATA BUS + GMLAN DATA BUS - 8 9 GMLAN DATA BUS + GMLAN DATA BUS - ADAPTIVE CRUISE MODULE (ACM) (CENTER OF VEHICLE) AUDIO AMPLIFIER (BEHIND LEFT REAR SEAT BACK) AUTOMATIC TRANSMISSION BLK WIRE BLK/WHT WIRE BODY CONTROL MODULE (BCM) (BEHIND RIGHT SIDE OF DASH) BRN WIRE BRN/WHT WIRE CD CHANGER CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA DATA LINK CONNECTOR (DLC) (UNDER LEFT SIDE OF DASH) DIGITAL RADIO RECEIVER DRIVER MEMORY SEAT MODULE (UNDER DRIVER'S SEAT) DK BLU WIRE DOOR DRIVER DOOR MODULE (DDM) (IN DRIVER'S DOOR) ELECTRONIC BRAKE CONTROL MODULE (EBCM) (LEFT FRONT OF ENGINE COMPT) ELECTRONIC SUSPENSION CONTROL (ESC) MODULE (LEFT REAR OF LUGGAGE COMPT) ENGINE CONTROL MODULE (ECM) (LOWER RIGHT REAR OF ENGINE COMPT) EXHAUST FLOW CONTROL MODULE (LEFT REAR OF VEHICLE) FOLDING TOP MODULE (LEFT SIDE OF FOLDING TOP STORAGE COMPT) FRONT PASSENGER DOOR MODULE (FPDM) (IN FRONT GMLAN DATA BUS- GMLAN DATA BUS- GMLAN DATA BUS- GMLAN DATA BUS- GRY WIRE HEAD UP DISPLAY (HUD) (TOP LEFT SIDE OF DASH) INSTRUMENT PANEL CLUSTER (IPC) HEADLAMP MODULE (RIGHT REAR CORNER OF ENGINE COMPT) HIGH SPEED GMLAN SERIAL DATA BUS + HIGH SPEED GMLAN SERIAL DATA BUS + HIGH SPEED GMLAN SERIAL DATA BUS - HOT AT ALL TIMES HVAC CONTROL MODULE (AT CENTER OF DASH) LOGIC LOGIC HIGH SPEED GMLAN SERIAL DATA BUS - LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE ORG/ WIRE PNK WIRE PPL RADIO REMOTE CONTROL DOOR LOCK RECEIVER (RCDLR) (BEHIND RIGHT SIDE OF DASH) REAR FOG/ALDL FUSE 30 RED/WHT WIRE SPLICE PACK TAN WIRE TAN/BLK WIRE W/ ONSTAR W/O ONSTAR WHT WIRE YEL WIRE

1 2 3 4 5 6 7 LOW REF GROUND BATT SUPP VOL 1250 342 (RIGHT SIDE OF ENGINE COMPT) BLK WIRE CHECK GAUGES COMPUTER DATA LINES SYSTEM COOLANT LEVEL SWITCH (LEFT SIDE OF ENGINE COMPT) COOLANT OVER TEMP ENGINE HOT/STOP ENGINE LOW COOLANT COOLFAN FUSE 25 COOLING FAN MOTOR (LOWER FRONT OF ENGINE) DK GRN WIRE ENGINE CONTROL MODULE (ECM) (LOWER RIGHT REAR OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (REAR SIDE OF RIGHT CYLINDER HEAD) FAN CONTROL MODULE (AT LOWER RIGHT OF COOLING FAN) GRY WIRE HOT AT ALL TIMES HUD CLASS 2 SERIAL DATA IGN MESSAGE REQUEST INSTRUMENT PANEL CLUSTER (IPC) MESSAGE CENTER IPC CLASS 2 SERIAL DATA LOGIC LOGIC HVAC CONTROL MODULE (AT CENTER OF DASH) MESSAGE REQUEST IGN RED WIRE RED/BLK WIRE RED/ORG WIRE SERIAL DATA IND CTRL SPEED CTRL TAN WIRE TAN/BLK WIRE UNDERHOOD FUSE BLOCK (RIGHT REAR OF ENGINE COMPT) WHT WIRE YEL WIRE YEL/BLK WIRE

A/C COMP CLUTCH RLY ACC VLT IGN 1 VLT BATT POS VLT ACCELERATOR PEDAL POSITION (APP) SENSOR (TOP OF ACCELERATOR PEDAL ASSEMBLY) AIR CONDITIONING SYSTEM BLK/WHT WIRE BRN WIRE BRN/WHT WIRE DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECM FUSE 16 ECM/ TCM FUSE 11 MRRTD FUSE 13 ENG SPEED SIG ENGINE CONTROL MODULE (ECM) (LOWER RIGHT REAR OF ENGINE COMPT) ETC FUSE 9 EVAP VENT SOL CTRL STR ENABLE RLY CTRL EVAPORATIVE EMISSION (EVAP) CANISTER VENT SOLENOID GND LOW REF GRY WIRE HOT AT ALL TIMES IAT SENS SIG IGN 1 RELAY 44 LOGIC LOGIC INTAKE AIR TEMPERATURE (IAT)/ MASS AIR FLOW (MAF) SENSOR (IN AIR INTAKE) LOW REF LOW REF LOW REF PPL LT BLU WIRE LT GRN WIRE MAF SENS SIG IGN 1 VOL MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR (RIGHT SIDE OF INTAKE MANIFOLD) MIL CTRL FUEL PMP RLY CTRL ORG/BLK WIRE PNK PNK WIRE PNK WIRE PPL RED/WHT WIRE RUN/ CRANK RELAY 7 RUN/ CRANK RLY CTRL STARTING/ CHARGING SYSTEM STOP LAMP SW SIG STP LMP SW SIG VLT SIG TAN WIRE TAN/BLK WIRE TO EMISSION FUSE 14 (DIAGRAM 4 OF 5) TRANSMISSIONS SYSTEM VEHICLE SPEED SIG WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BANK 1 SENSOR 2 (RIGHT SIDE EXHAUST, AFTER CATALYTIC CONVERTER) BANK 2 SENSOR 2 (IN LEFT EXHAUST PIPE, AFTER CATALYTIC CONVERTER) BAROMETRIC PRESSURE (BARO) SENSOR (TOP LEFT SIDE OF ENGINE) BRN WIRE BRN/WHT WIRE COMPUTER DATA LINES SYSTEM DK BLU WIRE DK GRN WIRE DK GRN/ WHT WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LOWER RIGHT REAR OF ENGINE COMPT) ENGINE COOLANT TEMPERATURE (ECT) SENSOR (REAR SIDE OF RIGHT CYLINDER HEAD) FROM ODD INJ FUSE 12 (DIAGRAM 4 OF 5) FUSE 6 GEN TURN ON SIG GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HEATED OXYGEN INSTRUMENT PANEL CLUSTER (IPC) INTAKE AIR TEMPERATURE SENSOR (IN AIR INTAKE) LOGIC CLASS 2 SER DATA IGN (ECM) ESS LT BLU WIRE LT GRN WIRE MIL IND MESSAGE CENTER NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK 12 13 14 15 16 17 18 19 WIRE PNK PNK WIRE PNK WIRE PPL PPL/WHT WIRE RADIO STARTING/ CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (RIGHT REAR OF ENGINE COMPT) VSS WHT WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

13 14 15 16 PNK WIRE 4 5 6 7 PNK WIRE A/C PRESS SENS SIG AIR CONDITIONING SYSTEM BARO SENS SIG BLK WIRE BLK/WHT WIRE BRN WIRE BYPASS VALVE CTRL CHARGE AIR COOLER (CAC) COOLANT PUMP COMPUTER DATA LINES SYSTEM COOL FAN SPD CTRL COOLANT PMP RLY CTRL DATA BUS - DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ECT SEN SIG ENGINE CONTROL MODULE (ECM) (LOWER RIGHT REAR OF ENGINE COMPT) EVAP CNSTR PUR SOL CTRL FUEL LEVEL SENSOR FUEL PUMP FUSE 10 FUEL PUMP LEFT FUEL LEVEL SENSOR FUEL PUMP RELAY 55 FUEL TANK PRESSURE (FTP) SENSOR GEN FIELD DUTY CYC SIG GRY WIRE GRY/BLK WIRE GRY/WHT WIRE HOT AT ALL TIMES LOW REF LT BLU WIRE LT GRN WIRE MAP SEN SIG OF ENGINE COMPARTMENT) OIL LEV SW SIG ORG/BLK WIRE PARK/NEUTRAL SIG PNK 12 13 14 15 16 17 18 19 WIRE PNK PNK WIRE PNK WIRE PPL PPL/WHT WIRE REAR OF ENGINE COMPT BY BATTERY, RED/WHT WIRE RIGHT FRAME RAIL) STARTING/ CHARGING SYSTEM TAN WIRE TAN/BLK WIRE TAN/WHT WIRE UNDERHOOD FUSE BLOCK (RIGHT REAR W/S WASH/ INTERCOOL FUSE 17 WHT/BLK WIRE YEL WIRE YEL/BLK WIRE

BLK PNK/ WIRE BLK WIRE BLK/WHT WIRE BLU WIRE BRN WIRE BRN/WHT WIRE CAMSHAFT POSITION (CMP) SENSOR BANK 1 EXHAUST (FRONT OF RIGHT CYLINDER HEAD) CAMSHAFT POSITION (CMP) SENSOR BANK 1 INTAKE (TOP FRONT OF RIGHT CYLINDER HEAD) CAMSHAFT POSITION (CMP) SENSOR BANK 2 EXHAUST (TOP FRONT OF LEFT CYLINDER HEAD) CAMSHAFT POSITION (CMP) SENSOR BANK 2 INTAKE (TOP FRONT OF LEFT CYLINDER HEAD) CRANKSHAFT POSITION (CKP) SENSOR (UNDER INTAKE MANIFOLD) DK BLU WIRE DK BLU/WHT WIRE DK GRN WIRE DK GRN/ WHT WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (LOWER RIGHT REAR OF ENGINE COMPT) FUEL INJ 4 CTRL IC 3 CTRL IC 4 CTRL IC 8 CTRL FUEL INJ 6 CTRL FUEL INJ 7 CTRL FUEL INJ 1 CTRL GROUND GRY WIRE GRY/BLK WIRE GRY/WHT WIRE IAT SENS SIG CKP SEN SIG TPS 1 SIG ENG OIL TEMP SENS TPS 2 SIG MAF SENS SIG KS 2 SIG KS 2 SIG KS 1 SIG KS 1 SIG LOGIC LOW REF LOW REF LOW REF LOW REF FUEL INJ 2 CTRL FUEL INJ 5 CTRL LT BLU WIRE LT BLU/BLK WIRE LT BLU/WHT WIRE LT GRN WIRE LT GRN/BLK WIRE OIL PRESSURE SEN SIG ORG BLK WIRE ORG/ WIRE ORG/BLK WIRE ORG/WHT WIRE PNK WIRE PNK/BLK WIRE PPL PPL PNK WIRE PPL/WHT WIRE RED WIRE SEN SIG SENS SIG TAC MTR CTRL 1 TAC MTR CTRL 2 IGN 1 VLT TAN WIRE TAN/BLK WIRE TAN/WHT WIRE THROTTLE BODY ASSEMBLY (TOP OF ENGINE, AT INTAKE MANIFOLD) WHT WIRE WHT/ DK BLU WIRE WHT/BLK WIRE YEL WIRE YEL/BLK WIRE