Cadillac CTS I (2002-2007) engine control module (ecm) (front of right valve cover) Wiring diagrams

225 23 GEN TURN ON SIG GEN DUTY CYCLE SIG B+ CLASS 2 BATTERY BATTERY CHARGE INDICATOR BLK WIRE COMPUTER DATA LINES SYSTEM ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) FUSIBLE LINK GENERATOR GROUND DISTRIBUTION SYSTEM GRY WIRE INSTRUMENT PANEL CLUSTER (IPC) LOGIC ORG/ WIRE POWER DISTRIBUTION SYSTEM PPL PPL 25 9 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL SERIAL DATA CLASS 2 PPL/ PPL/ PPL/ RED WIRE STARTER WHT WIRE

A/T AUTOMATIC TRANSMISSION (A/T) BATTERY BLK WIRE CHARGING CIRCUIT CLUTCH PEDAL POSITION SWITCH (M/T) (ON CLUTCH PEDAL BRACKET) COMPUTER DATA LINES SYSTEM ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) GROUND DISTRIBUTION SYSTEM HOT AT ALL TIMES HOT IN RUN OR START HTR VLV/ CLTCH FUSE IGN 1 RELAY IGNITION SWITCH LOCK OFF ORG/BLK WIRE PNK PNK WIRE PNK WIRE PPL PPL/WHT WIRE RED WIRE RUN WIRE STARTER STARTER FUSE STARTER RELAY UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE

5 9 25 PNK PPL PPL WIRE BLK WIRE BLK/WHT WIRE BRAKE PEDAL POSITION SENSOR (NEAR TOP OF BRAKE PEDAL) BRN WIRE BRN/WHT WIRE CLUTCH PEDAL POSITION (CPP) SENSOR (M/T) COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE INDICATOR DK GRN WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN OR START HTR VLV/ CLTCH FUSE STRG CTLS FUSE IGN 1 RELAY IGNITION CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA INSTRUMENT PANEL CLUSTER (IPC) LOGIC MAIN RELAY ON OFF ORG/ WIRE PNK PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL/ PPL/ PPL/ R/A TAN WIRE TCM/ IPC FUSE THROTTLE ACTUATOR CONTROL (TAC) MOTOR THROTTLE BODY ASSEMBLY THROTTLE POSITION (TP) SENSOR TOS FUSE TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (M/T) (ON RIGHT REAR OF TRANSMISSION) WHT WIRE YEL WIRE

225 23 GEN TURN ON SIG GEN DUTY CYCLE SIG B+ CLASS 2 BATTERY BATTERY CHARGE INDICATOR BLK WIRE COMPUTER DATA LINES SYSTEM ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) FUSIBLE LINK GENERATOR GROUND DISTRIBUTION SYSTEM GRY WIRE INSTRUMENT PANEL CLUSTER (IPC) LOGIC ORG/ WIRE POWER DISTRIBUTION SYSTEM PPL PPL 25 9 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL SERIAL DATA CLASS 2 PPL/ PPL/ PPL/ RED WIRE STARTER WHT WIRE

5 9 25 PNK PPL PPL WIRE BLK WIRE BLK/WHT WIRE BRAKE PEDAL POSITION SENSOR (NEAR TOP OF BRAKE PEDAL) BRN WIRE BRN/WHT WIRE CLUTCH PEDAL POSITION (CPP) SENSOR (M/T) COMPUTER DATA LINES SYSTEM CRUISE CONTROL SWITCH CRUISE INDICATOR DK GRN WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN OR START HTR VLV/ CLTCH FUSE STRG CTLS FUSE IGN 1 RELAY IGNITION CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA INSTRUMENT PANEL CLUSTER (IPC) LOGIC MAIN RELAY ON OFF ORG/ WIRE PNK PNK PNK WIRE PNK WIRE PNK/BLK WIRE PPL PPL/ PPL/ PPL/ R/A TAN WIRE TCM/ IPC FUSE THROTTLE ACTUATOR CONTROL (TAC) MOTOR THROTTLE BODY ASSEMBLY THROTTLE POSITION (TP) SENSOR TOS FUSE TURN SIGNAL/ MULTI-FUNCTION SWITCH UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) VEHICLE SPEED SENSOR (VSS) (M/T) (ON RIGHT REAR OF TRANSMISSION) WHT WIRE YEL WIRE

A/T AUTOMATIC TRANSMISSION (A/T) BATTERY BLK WIRE CHARGING CIRCUIT CLUTCH PEDAL POSITION SWITCH (M/T) (ON CLUTCH PEDAL BRACKET) COMPUTER DATA LINES SYSTEM ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) GROUND DISTRIBUTION SYSTEM HOT AT ALL TIMES HOT IN RUN OR START HTR VLV/ CLTCH FUSE IGN 1 RELAY IGNITION SWITCH LOCK OFF ORG/BLK WIRE PNK PNK WIRE PNK WIRE PPL PPL/WHT WIRE RED WIRE RUN WIRE STARTER STARTER FUSE STARTER RELAY UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE

5.7L 62 13 EXTENDED TRAVEL BRAKE SW SIG REQUESTED TORQUE SIGNAL 8 11 PPL PPL CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA ABS FUSE ABS INDICATOR SIG BAS RELAY COIL SUPPLY VOLTAGE BAS RLY COIL SUPPLY VOLTAGE BLK WIRE BPP SENSOR SIGNAL BRAKE PEDAL POSITION SENSOR (NEAR TOP OF BRAKE PEDAL) BRAKE PUMP MOTOR BRN WIRE COMPUTER DATA LINES SYSTEM DELIVERED TORQUE SIGNAL DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) EXCEPT 5.7L GROUND HIGH EFFORT CTRL LOW EFFORT CTRL GRY WIRE GRY/BLK WIRE HOT AT ALL TIMES HOT IN RUN OR START IGN 1 RELAY LOGIC LOW REFERENCE 5 VOLT REFERENCE LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MESSAGE CENTER MESSAGE REQUEST LOGIC NCA WIRE ORG/ WIRE ORG/BLK WIRE PNK ABS FUSE WIRE PNK WIRE POWERTRAIN CONTROL MODULE (PCM) PPL RADIO RED/BLK WIRE REQUESTED TORQUE SIGNAL RIGHT REAR FUSE BLOCK (BELOW RIGHT REAR SEAT) SPLICE PACK TAN WIRE TAN/BLK WIRE THROTTLE ACTUATOR CONTROL (TAC) MODULE (RIGHT FRONT OF ENGINE COMPARTMENT) TRACTION CONTROL DATA SIG TRACTION CONTROL DATA SIGNAL CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL TRACTION SUSPENDED SERVICE SUSPENSION SYS TRANSMISSIONS SYSTEM UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) VARIABLE EFFORT STEERING ACTUATOR (ON POWER STEERING GEAR INPUT SHAFT) W/ SOFT RIDE SUSPENSION SYSTEM WHT WIRE YEL WIRE YEL/BLK WIRE

25 9 49 39 24 4 20 LOW REFERENCE A/C REFRIG PRESS SENSOR A/C CLUTCH RELAY CTRL 42 80 74 LOW SPEED FAN RELAY CTRL LOW REFERENCE ECT SENSOR SIGNAL 5.7L 65 33 MAIN RELAY CTRL HI SPEED FAN RELAY CTRL 7 23 LOW REFERENCE ECT SENSOR SIGNAL 80 14 43 LOW REFERENCE A/C REFRIG PRESS SENSOR A/C CLUTCH RELAY CTRL A/C REFRIGERANT PRESSURE SENSOR (NEAR THE LEFT FRONT STRUT TOWER) AMBIENT AIR TEMPERATURE SENSOR (UNDER FRONT BUMPER, NEAR FRONT GRILLE) BLK WIRE BRN WIRE COOLANT LEVEL SWITCH (IN LEFT FRONT CORNER OF COOLANT SURGE TANK) DK BLU WIRE DK GRN WIRE DK GRN/WHT WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) ENGINE CONTROLS SYSTEM ENGINE COOLANT LOW LEVEL EXCEPT 5.7L EXCEPT 5.7L 5.7L FEED GRY WIRE HI SPEED FAN RELAY HIGH FAN FUSE HOT AT ALL TIMES LEFT COOLING FAN (LEFT SIDE OF RADIATOR) LO SPEED FAN RELAY LOGIC LOW FAN FUSE LT BLU WIRE LT GRN WIRE LT GRN/BLK WIRE MAIN RELAY MAIN RELAY CTRL HI SPEED FAN RELAY CTRL LOW SPEED FAN RELAY CTRL MESSAGE CENTER ORG/ WIRE ORG/BLK WIRE POWERTRAIN CONTROL MODULE PPL RADIO RIGHT COOLING FAN (RIGHT SIDE OF RADIATOR) RTN S/P FAN RELAY SERIAL DATA SIG SPLICE PACK TAN WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE

1807 1807 PPL PPL 22 23 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA 1807 1807 PPL PPL CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA 20 21 2500 2501 H SPEED GMLAN DATA BUS + H SPEED GMLAN DATA BUS - 24 PPL 26 PPL 25 PPL 3 2 5 1 6 4 PPL PPL PPL PPL PPL PPL 33 32 2501 2500 H SPEED GMLAN DATA BUS - H SPEED GMLAN DATA BUS + 5.7L A/T EXCEPT 5.7L AUDIO AMPLIFIER (LEFT SIDE OF TRUNK) BASE BLK WIRE BLK/WHT WIRE CLASS 2 SERIAL DATA LEFT HEADLAMP CLASS 2 SERIAL DATA RIGHT HEADLAMP DATA LINK CONNECTOR (UNDER LEFT SIDE OF DASH) DIGITAL RADIO RECEIVER (LEFT SIDE OF REAR PACKAGE SHELF) DIM/ALDL FUSE DRIVER DOOR MODULE (ON LEFT DOOR, UNDER DOOR TRIM) DRIVER DOOR SWITCH ASSEMBLY (DDSA) DRIVER'S MEMORY SEAT MODULE (UNDER DRIVER'S SEAT) ELECTRONIC BRAKE CONTROL MODULE (EBCM) (AT RIGHT FRONT CORNER OF ENGINE COMPT) ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) EXCEPT 5.7L EXCEPT 5.7L PPL FRONT PASSENGER DOOR MODULE (ON RIGHT FRONT DOOR, UNDER DOOR TRIM PANEL) HOT AT ALL TIMES HVAC CONTROL MODULE (BEHIND CENTER OF DASH, BELOW RADIO) INFLATABLE RESTRAINT SENSING, DIAGNOSTIC MODULE (UNDER CENTER CONSOLE) INSTRUMENT PANEL CLUSTER (IPC) LEFT REAR DOOR MODULE (UNDER DOOR TRIM PANEL) LT GRN WIRE LUXURY POWERTRAIN CONTROL MODULE PPL PPL CLASS 2 SERIAL DATA PPL PPL 1807 1807 11 8 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL 1807 1807 25 9 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL 1807 1807 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL 59 58 1807 1807 CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL CLASS 2 SERIAL DATA CLASS 2 SERIAL DATA PPL PPL PPL PPL PPL PPL PPL PPL RADIO RADIO ANTENNA MODULE (ABOVE HEADLINER, NEAR REAR WINDOW) REAR INTEGRATION MODULE (RIM) (UNDER PACKAGE SHELF TRIM PANEL) RED WIRE RED/WHT WIRE RIGHT REAR DOOR MODULE (ON RIGHT REAR DOOR, UNDER DOOR TRIM PANEL) THEFT DETERRENT CONTROL MODULE (AT TOP OF STEERING COLUMN) TRANSMISSION CONTROL MODULE (TCM) (AT RIGHT FRONT OF ENGINE COMPT) TV ANTENNA MODULE UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPT) W/ AUTOMATIC HEADLAMPS CONTROL LEVELING SYSTEM WHT WIRE WHT/BLK WIRE

24 4 20 MAIN RELAY CTRL HIGH SPEED FAN RELAY CTRL LOW SPEED FAN RELAY CTRL 2761 (OR 470) 410 42 80 74 LOW SPEED FAN RELAY CTRL LOW REFERENCE ECT SENSOR SIGNAL 5.7L 65 33 MAIN RELAY CTRL HIGH SPEED FAN RELAY CTRL 7 23 LOW REFERENCE ECT SENSOR SIGNAL BLK WIRE BLU WIRE BRN WIRE COMPUTER DATA LINES SYSTEM COOLANT LEVEL SWITCH (IN LEFT FRONT CORNER OF COOLANT SURGE TANK) DK BLU WIRE DK GRN WIRE ENGINE CONTROL MODULE (ECM) (FRONT OF RIGHT VALVE COVER) ENGINE COOLANT LOW LEVEL EXCEPT 5.7L GRY WIRE HI FAN FUSE HI SPEED FAN RELAY HOT AT ALL TIMES HVAC CONTROL MODULE (BEHIND CENTER OF DASH, BELOW RADIO) LEFT COOLING FAN (LEFT SIDE OF RADIATOR) LO SPEED FAN RELAY LOGIC LOW FAN FUSE LT BLU WIRE LT GRN WIRE MAIN RELAY MESSAGE CENTER POWERTRAIN CONTROL MODULE (PCM) PPL PPL PPL SERIAL DATA SERIAL DATA COOLANT LEVEL SW RADIO RIGHT COOLING FAN (RIGHT SIDE OF RADIATOR) S/P FAN RELAY SERIAL DATA TAN WIRE UNDERHOOD FUSE BLOCK (RIGHT FRONT OF ENGINE COMPARTMENT) WHT WIRE YEL WIRE