Engine Controls Schematics. Buick LaCrosse 2005

For 1990-2009 cars only

Makes 🢒 Buick 🢒 2005 🢒 LaCrosse 🢒 Vehicle Control Systems 🢒 Vehicle DTC Information 🢒 Engine Controls Schematics

Figure 1:	Module Power, Ground, Serial Data, and MIL Master Electrical Component List Engine Control Module Description Control Module References 5 Volt and Low Reference, Page 1 of 2 OBD II Symbol Description Notice Ignition Switch G115 (LY7) Fuse Block - Underhood B+ Bus Fuse Block - Underhood ABS, TRANS SOL, PCM, SIR, and DISPLAY Fuses, CRANK Relay, and Fuse Block - I/P CRUISE SW Fuse Ignition Switch Fuse Block - Underhood ABS, TRANS SOL, PCM, SIR, and DISPLAY Fuses, CRANK Relay, and Fuse Block - I/P CRUISE SW Fuse LY7 TCM Power, Ground, and Serial Data (LY7) G115 (LY7) G101, G102, G103, G111, G112, and G113
Figure 2:	5-Volt and Low Reference - 1 of 2 Master Electrical Component List Engine Control Module Description Control Module References 5 Volt and Low Reference, Page 2 of 2 Module Power, Ground, Serial Data, and MIL OBD II Symbol Description Notice
Figure 3:	5-Volt and Low Reference - 2 of 2 Master Electrical Component List Engine Control Module Description Control Module References Pressure and Temperature Sensors 5 Volt and Low Reference, Page 1 of 2 OBD II Symbol Description Notice
Figure 4:	Pressure and Temperature Sensors Master Electrical Component List Air Intake System Description Control Module References MAF, VSS and Stop Lamp Switch 5 Volt and Low Reference, Page 2 of 2 OBD II Symbol Description Notice 5 Volt and Low Reference, Page 2 of 2 Indicators (UH8) 5 Volt and Low Reference, Page 2 of 2
Figure 5:	MAF, VSS and Stop Lamp Switch Master Electrical Component List Air Intake System Description Control Module References Oxygen Sensors Pressure and Temperature Sensors OBD II Symbol Description Notice Fuse Block - Underhood B+ Bus Fuse Block - Underhood ETC, ELEK IGN (L26), FUEL INJ (L26), 02 SSR (L26), and EMISSION Fuses Turn Signal, Hazard, and Stop Lamps Outputs Fuse Block - Underhood ETC, ELEK IGN (L26), FUEL INJ (L26), 02 SSR (L26), and EMISSION Fuses Shift and TCC Solenoid Valves, TFT Sensor, and Stop Lamp Switch (LY7) Indicators, Stop Lamp, Traction Controls, and Serial Data 5 Volt and Low Reference, Page 1 of 2 Rear Parking Assist Schematics
Figure 6:	Oxygen Sensors Master Electrical Component List Engine Control Module Description Control Module References Electronic Throttle Controls MAF, VSS and Stop Lamp Switch OBD II Symbol Description Notice Fuse Block - Underhood B+ Bus Fuse Block - Underhood ETC, ELEK IGN (L26), FUEL INJ (L26), 02 SSR (L26), and EMISSION Fuses Fuse Block - Underhood ETC, ELEK IGN (L26), FUEL INJ (L26), 02 SSR (L26), and EMISSION Fuses Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7) Engine Controls Schematic Icons Engine Controls Schematic Icons
Figure 7:	Electronic Throttle Controls Master Electrical Component List Throttle Actuator Control (TAC) System Description Control Module References Ignition Controls - Bank 1 (Odd) Ignition Coils Oxygen Sensors OBD II Symbol Description Notice Engine Controls Schematic Icons
Figure 8:	Ignition Controls - Bank 1 (Odd) Ignition Coils Master Electrical Component List Electronic Ignition (EI) System Description Control Module References Ignition Controls - Bank 2 (Even) Ignition Coils Electronic Throttle Controls OBD II Symbol Description Notice Fuse Block - Underhood B+ Bus Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7) Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7) G130, G131 - LY7
Figure 9:	Ignition Controls - Bank 2 (Even) Ignition Coils Master Electrical Component List Electronic Ignition (EI) System Description Control Module References Knock and CKP Sensors and Engine Speed Ignition Controls - Bank 1 (Odd) Ignition Coils OBD II Symbol Description Notice Fuse Block - Underhood B+ Bus Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7) Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7) G130, G131 - LY7
Figure 10:	Ignition Controls - Knock and CKP Sensors and Engine Speed Master Electrical Component List Knock Sensor (KS) System Description Control Module References Ignition Controls - CMP Sensors and Solenoids Ignition Controls - Bank 2 (Even) Ignition Coils OBD II Symbol Description Notice Indicators, Stop Lamp, Traction Controls, and Serial Data Engine Controls Schematic Icons Engine Controls Schematic Icons
Figure 11:	Ignition Controls - CMP Sensors and Solenoids Master Electrical Component List Camshaft Actuator System Description Control Module References Fuel Controls - Fuel Pump and Injectors Knock and CKP Sensors and Engine Speed OBD II Symbol Description Notice Fuse Block - Underhood B+ Bus Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7) Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7) 5 Volt and Low Reference, Page 2 of 2
Figure 12:	Fuel Controls - Fuel Pump and Injectors Master Electrical Component List Fuel System Description Control Module References EVAP Controls Ignition Controls - CMP Sensors and Solenoids OBD II Symbol Description Notice Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7) G115 (LY7) Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7) Power, Ground, Serial Data, and Gages (LY7) G115 (LY7) G302
Figure 13:	EVAP Controls Master Electrical Component List Evaporative Emission Control System Description Control Module References Module References Fuel Controls - Fuel Pump and Injectors OBD II Symbol Description Notice Fuse Block - Underhood BATT MAIN 1 Fuse, Fuse Block - I/P PK LAMPS, DISPLAYS, CHMSL/BKUP, INT LIGHT, RFA/MOD, RADIO/AMP, ONSTAR/ALDL, HVAC, and CANISTER Fuses and PK LP Relay Fuse Block - Underhood B+ Bus Power, Ground, Serial Data, and Gages (LY7) Fuse Block - Underhood ELEK IGN, FUEL INJ, and 02 SSR Fuses (LY7) 5 Volt and Low Reference, Page 1 of 2 5 Volt and Low Reference, Page 1 of 2
Figure 14:	Module References Master Electrical Component List Engine Control Module Description Control Module References Fuel Controls - Fuel Pump and Injectors OBD II Symbol Description Notice Compressor Controls and Serial Data (L26) Engine Cooling Schematics Indicators, Stop Lamp, Traction Controls, and Serial Data Starting - LY7 Charging Indicators (UH8) L26 Internal Mode Switch (LY7)