Engine Controls Schematics. Chevrolet Blazer

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2001 🢒 Blazer - 2WD 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Engine Controls Schematics

Figure 1:	ECM B, ECM I and GAUGES Fuses, Ground, Generator and MIL Master Electrical Component List Powertrain Control Module Description CLSTR and 4WD Fuses ECM B Fuse and Horn, Rear Defogger Relays ECM I Fuse Power and Ground Ign RUN and START Bus Bar Power and Ground G103 and G105 (4.3 L) G103 and G105 (4.3 L)
Figure 2:	CLSTR and 4WD Fuses Master Electrical Component List Powertrain Control Module Description Data Link Connector (DLC) ECM B, ECM I and GAUGES Fuses, Ground, Generator and MIL OBD II Symbol Description Notice Ign ACC, RUN and RAP Bus Bar Power and Ground CRANK and CLSTR Fuses Transfer Case Shift Control Switch Power, Ground and Transfer Case Encoder Motor Front Axle Indicator Switch and Powertrain Control Module (PCM) Power and Ground Power, Ground and Transfer Case Encoder Motor CRANK Fuse, Front Axle Indicator Switch, and Front Axle Vacuum Solenoid CRANK and CLSTR Fuses Class 2 Communication
Figure 3:	Data Link Connector (DLC) Master Electrical Component List Powertrain Control Module Description Engine Sensors (Pickup) CLSTR and 4WD Fuses OBD II Symbol Description Notice INT BATT Fuse Except Envoy G200, G201 and G207 (Pickup and Crew Cab) G103 and G105 (4.3 L) G103 and G105 (4.3 L) G103 and G105 (4.3 L) G103 and G105 (4.3 L) G103 and G105 (4.3 L) Power, Ground, Transfer Case Shift Control Module and Vehicle InterfacE Unit (VIU) SP201 (2.2L)
Figure 4:	Engine Sensors (Pickup) Master Electrical Component List Powertrain Control Module Description Engine Sensors (Utility) Data Link Connector (DLC) OBD II Symbol Description Notice SP201 (2.2L) Fuel Level Sensor
Figure 5:	Engine Sensors (Utility) Master Electrical Component List Powertrain Control Module Description Heated Oxygen Sensors Engine Sensors (Pickup) OBD II Symbol Description Notice Fuel Level Sensor
Figure 6:	Heated Oxygen Sensors Master Electrical Component List Powertrain Control Module Description MAF Sensor and IAC Valve Engine Sensors (Utility) OBD II Symbol Description Notice Ign RUN and START Bus Bar G104 and G117 G102 (Except Export)
Figure 7:	MAF Sensor and IAC Valve Master Electrical Component List Powertrain Control Module Description Vehicle Speed Sensor (VSS) Heated Oxygen Sensors OBD II Symbol Description Notice EGR and EVAP Valves Ign RUN and START Bus Bar G103 and G105 (4.3 L)
Figure 8:	Vehicle Speed Sensor (VSS) Master Electrical Component List Powertrain Control Module Description Ignition Controls MAF Sensor and IAC Valve OBD II Symbol Description Notice Heated Oxygen Sensors Speed Sensors Speed Sensors G104 and G117
Figure 9:	Ignition Controls Master Electrical Component List Powertrain Control Module Description Fuel Pump Controls Vehicle Speed Sensor (VSS) OBD II Symbol Description Notice Ign RUN and START Bus Bar ECM I Fuse MAF Sensor and IAC Valve Indicators G103 and G105 (4.3 L) G103 and G105 (4.3 L)
Figure 10:	Fuel Pump Controls Master Electrical Component List Powertrain Control Module Description Fuel Injection Controls Ignition Controls OBD II Symbol Description Notice ECM B Fuse and Horn, Rear Defogger Relays G102 (Except Export) G402 and G421 (Utility) Park and License Lamps, Rear (Utility) Heated Oxygen Sensors
Figure 11:	Fuel Injection Controls Master Electrical Component List Powertrain Control Module Description Fuel Level Sensor Fuel Pump Controls OBD II Symbol Description Notice ECM I Fuse
Figure 12:	Fuel Level Sensor Master Electrical Component List Powertrain Control Module Description EGR and EVAP Valves Fuel Injection Controls OBD II Symbol Description Notice Engine Sensors (Pickup) Engine Sensors (Utility)
Figure 13:	EGR and EVAP Valves Master Electrical Component List Powertrain Control Module Description Secondary AIR Pump Control Fuel Level Sensor OBD II Symbol Description Notice MAF Sensor and IAC Valve Ign RUN and START Bus Bar
Figure 14:	Secondary AIR Pump Control Master Electrical Component List Powertrain Control Module Description Manual A/C Compressor Control EGR and EVAP Valves OBD II Symbol Description Notice Ign RUN and START Bus Bar B+ Bus Bar B+ Bus Bar
Figure 15:	Manual A/C Compressor Control Master Electrical Component List Powertrain Control Module Description Automatic A/C Compressor Control Secondary AIR Pump Control OBD II Symbol Description Notice HTD SEAT, ATC, HVAC and A/C Fuses IGN E Fuse and A/C Compressor, Rear Defogger, DRL Relays Ign ACC, RUN and RAP Bus Bar G102 (Except Export) Heated Oxygen Sensors G103 and G105 (4.3 L) Blower Controls (RPO C42)
Figure 16:	Automatic A/C Compressor Control Master Electrical Component List Powertrain Control Module Description Brake Switch Input Manual A/C Compressor Control OBD II Symbol Description Notice B+ Bus Bar IGN E Fuse and A/C Compressor, Rear Defogger, DRL Relays G102 (Except Export) Heated Oxygen Sensors SP201 (4.3L) G103 and G105 (4.3 L)
Figure 17:	Brake Switch Input Master Electrical Component List Powertrain Control Module Description Vehicle Speed Signal, Transfer Case Shift Control Module and 4WD IndicatOr Switch Automatic A/C Compressor Control OBD II Symbol Description Notice Power and Ground Clutch Pedal Position Switch, Stoplamp Switch, PCM and Cruise Control Module
Figure 18:	Vehicle Speed Signal, Transfer Case Shift Control Module and 4WD Indicator Switch Master Electrical Component List Powertrain Control Module Description Automatic Transmission and PNP Switch Inputs Brake Switch Input OBD II Symbol Description Notice w/o Trip Computer Seat Belt Switch, Headlamp Ambient Light Sensor and PCM Class 2 Communication
Figure 19:	Automatic Transmission and PNP Switch Inputs Master Electrical Component List Powertrain Control Module Description Automatic Transmission Valve Controls Vehicle Speed Signal, Transfer Case Shift Control Module and 4WD IndicatOr Switch OBD II Symbol Description Notice G103 and G105 (4.3 L)
Figure 20:	Automatic Transmission Valve Controls Master Electrical Component List Powertrain Control Module Description Automatic Transmission and PNP Switch Inputs OBD II Symbol Description Notice Power and Ground Column/Ignition Lock Schematics (Standard)