Engine Controls Schematics. Chevrolet Blazer

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2000 🢒 Blazer - 4WD 🢒 Engine 🢒 Engine Controls - 4.3L 🢒 Engine Controls Schematics

Figure 1:	ECM B, ECM I and GAUGES Fuses, Ground, Generator and MIL Engine Controls Components Vehicle Control Module Description CLSTR and 4WD Fuses OBD II Symbol Description Notice ECM B Fuse and Horn, Rear Defogger Relays Power and Grounding Connector End Views ECM I Fuse AUX PWR, RDO BATT and HDLP SW Fuses Power and Ground Power Handling ESD Sensitive Parts Notice G103 and G105 (4.3L) VCM Connector End Views G103 and G105 (4.3L) Handling ESD Sensitive Parts Notice
Figure 2:	CLSTR and 4WD Fuses Engine Controls Components Vehicle 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 CRANK and CLSTR Fuses VCM Connector End Views Handling ESD Sensitive Parts Notice Transfer Case Shift Control Switch Power, Ground and Transfer Case Four Wheel Drive Indicator Switch and Vehicle Control Module (VCM) Power and Ground Power, Ground and Transfer Case CRANK Fuse, 4WD Indicator Switch and Axle Clutch Solenoid Four Wheel Drive Indicator Switch and Vehicle Control Module (VCM) CRANK Fuse, 4WD Indicator Switch and Axle Clutch Solenoid
Figure 3:	Data Link Connector (DLC) Engine Controls Components Serial Data Communications Engine Sensors (Pickup) CLSTR and 4WD Fuses OBD II Symbol Description Notice INT BATT Fuse Except Envoy G200, G201 and G207 (Utility) G103 and G105 (4.3L) Power and Grounding Connector End Views G103 and G105 (4.3L) G103 and G105 (4.3L) G103 and G105 (4.3L) G103 and G105 (4.3L) Power, Ground, Transfer Case Shift Control Module and Vehicle Interface Unit (VIU) VCM Connector End Views Handling ESD Sensitive Parts Notice Automatic Transmission Switch Inputs Body Control System Connector End Views Handling ESD Sensitive Parts Notice
Figure 4:	Engine Sensors (Pickup) Engine Controls Components Information Sensors/Switches Description Engine Sensors (Utility) Data Link Connector (DLC) OBD II Symbol Description Notice VCM Connector End Views Handling ESD Sensitive Parts Notice EGR and EVAP Valves Automatic Transmission Switch Inputs Fuel Level Sensor EGR and EVAP Valves Automatic Transmission and PNP Switch Inputs Handling ESD Sensitive Parts Notice
Figure 5:	Engine Sensors (Utility) Engine Controls Components Information Sensors/Switches Description Heated Oxygen Sensors Engine Sensors (Pickup) OBD II Symbol Description Notice VCM Connector End Views Handling ESD Sensitive Parts Notice EGR and EVAP Valves Automatic Transmission Switch Inputs EGR and EVAP Valves Automatic Transmission and PNP Switch Inputs Handling ESD Sensitive Parts Notice
Figure 6:	Heated Oxygen Sensors Engine Controls Components Information Sensors/Switches Description MAF Sensor and IAC Valve Engine Sensors (Utility) OBD II Symbol Description Notice Power and Grounding Connector End Views Ign RUN and START Bus Bar VCM Connector End Views Handling ESD Sensitive Parts Notice G104 and G117 G102 (Except Export)
Figure 7:	MAF Sensor and IAC Valve Engine Controls Components Information Sensors/Switches Description Vehicle Speed Sensor (VSS) Heated Oxygen Sensors OBD II Symbol Description Notice Power and Grounding Connector End Views ENG I and OXYSEN Fuses VCM Connector End Views Handling ESD Sensitive Parts Notice Ignition Controls G103 and G105 (4.3L) Handling ESD Sensitive Parts Notice
Figure 8:	Vehicle Speed Sensor (VSS) Engine Controls Components Information Sensors/Switches Description Ignition Controls MAF Sensor and IAC Valve OBD II Symbol Description Notice VCM Connector End Views Handling ESD Sensitive Parts Notice Heated Oxygen Sensors Speed Sensors Speed Sensors G104 and G117
Figure 9:	Ignition Controls Engine Controls Components Information Sensors/Switches Description Fuel Level Sensor Vehicle Speed Sensor (VSS) OBD II Symbol Description Notice ENG I and OXYSEN Fuses ECM I Fuse Power and Grounding Connector End Views MAF Sensor and IAC Valve Handling ESD Sensitive Parts Notice PCM/VCM, Data Link Connector (DLC), Engine Oil Pressure Gauge Sensor VCM Connector End Views G103 and G105 (4.3L) Handling ESD Sensitive Parts Notice G103 and G105 (4.3L)
Figure 10:	Fuel Level Sensor Engine Controls Components Fuel Supply Component Description Fuel Pump Controls Ignition Controls OBD II Symbol Description Notice Handling ESD Sensitive Parts Notice Engine Sensors (Pickup) Engine Sensors (Pickup) VCM Connector End Views Handling ESD Sensitive Parts Notice Engine Sensors (Utility)
Figure 11:	Fuel Pump Controls Engine Controls Components Fuel Supply Component Description Fuel Injection Controls Fuel Level Sensor OBD II Symbol Description Notice VCM Connector End Views Handling ESD Sensitive Parts Notice ECM B Fuse and Horn, Rear Defogger Relays G102 (Except Export) Power and Grounding Connector End Views G402, G422 and G475 (Fleetside Pickup) G402 (Utility) Heated Oxygen Sensors
Figure 12:	Fuel Injection Controls Engine Controls Components Central Sequential Duel Injection Fuel System Description EGR and EVAP Valves Fuel Pump Controls OBD II Symbol Description Notice ECM I Fuse Power and Grounding Connector End Views VCM Connector End Views Handling ESD Sensitive Parts Notice
Figure 13:	EGR and EVAP Valves Engine Controls Components Evaporative Emission Control System Operation Description Enhanced Secondary AIR Pump Control Fuel Injection Controls OBD II Symbol Description Notice Handling ESD Sensitive Parts Notice MAF Sensor and IAC Valve Power and Grounding Connector End Views ENG I and OXYSEN Fuses Engine Sensors (Pickup) Engine Sensors (Pickup) VCM Connector End Views
Figure 14:	Secondary AIR Pump Control Engine Controls Components Vehicle Control Module Description Manual A/C Compressor Control EGR and EVAP Valves OBD II Symbol Description Notice Ign RUN and START Bus Bar Power and Grounding Connector End Views B+ Bus Bar B+ Bus Bar VCM Connector End Views Handling ESD Sensitive Parts Notice
Figure 15:	Manual A/C Compressor Control Engine Controls Components Vehicle Control Module Description Automatic A/C Compressor Control Secondary AIR Pump Control OBD II Symbol Description Notice B+ Bus Bar Power and Grounding Connector End Views Ign RUN and START Bus Bar Ign ACC, RUN and RAP Bus Bar G102 (Except Export) Heated Oxygen Sensors VCM Connector End Views HVAC Connector End Views G103 and G105 (4.3L) Handling ESD Sensitive Parts Notice RPO C60
Figure 16:	Automatic A/C Compressor Control Engine Controls Components Vehicle Control Module Description Brake Switch Input Manual A/C Compressor Control OBD II Symbol Description Notice B+ Bus Bar Power and Grounding Connector End Views Ign RUN and START Bus Bar Handling ESD Sensitive Parts Notice G102 (Except Export) Heated Oxygen Sensors Automatic Transmission Switch Inputs VCM Connector End Views Handling ESD Sensitive Parts Notice G103 and G105 (4.3L)
Figure 17:	Brake Switch Input Engine Controls Components Vehicle 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 Ign ACC, RUN and RAP Bus Bar Power and Ground (310 ABS) Clutch Pedal Position Switch and Stoplamp Switch Clutch Pedal Position Switch and Stoplamp Switch VCM Connector End Views Handling ESD Sensitive Parts Notice Clutch Pedal Position Switch and Stoplamp Switch
Figure 18:	Vehicle Speed Signal, Transfer Case Shift Control Module and 4WD Indicator Switch Engine Controls Components Vehicle Control Module Description Automatic Transmission and PNP Switch Inputs Brake Switch Input OBD II Symbol Description Notice Handling ESD Sensitive Parts Notice Entertainment Connector End Views Handling ESD Sensitive Parts Notice Handling ESD Sensitive Parts Notice Antilock Brake System Connector End Views Handling ESD Sensitive Parts Notice w/o Trip Computer Power and Ground Transfer Case Control Connector End Views Handling ESD Sensitive Parts Notice Class 2 Communication (310 ABS) VCM Connector End Views Handling ESD Sensitive Parts Notice
Figure 19:	Automatic Transmission and PNP Switch Inputs Engine Controls Components Vehicle Control Module Description Automatic Transmission Valve Controls Vehicle Speed Signal, Transfer Case Shift Control Module and 4WD IndicAtor Switch OBD II Symbol Description Notice VCM Connector End Views Handling ESD Sensitive Parts Notice Engine Sensors (Pickup) Handling ESD Sensitive Parts Notice Shift Lock Control Connector End Views G103 and G105 (4.3L)
Figure 20:	Automatic Transmission Valve Controls Engine Controls Components Vehicle Control Module Description Automatic Transmission and PNP Switch Inputs OBD II Symbol Description Notice Power Column/Ignition Lock Schematics Column/Ignition Lock Schematics CLSTR and 4WD Fuses VCM Connector End Views Handling ESD Sensitive Parts Notice