Engine Controls Schematics. Chevrolet TrailBlazer

For 1990-2009 cars only

Makes 🢒 Chevrolet 🢒 2007 🢒 TrailBlazer - 4WD 🢒 Engine 🢒 Engine Controls and Fuel - 4.2L 🢒 Engine Controls Schematics

Figure 1:	Module Power, Ground Serial Data, and MIL Master Electrical Component List Powertrain Control Module Description Control Module References Underhood Fuse Block - PWR/TRN Relay B+ Bus - Underhood Fuse Block `AIR PUMP, EAP, ECM, HDM, HI HEADLAMP - LT, HI HEADLAMP - RT, IGN COILS, LO HEADLAMP - LT, LO HEADLAMP - RT, PCM B AND TBC I Fuses AIR SOL and PCMI Fuses - 4.2L Ignition Switch - ACCY/RUN, RUN/START Bus Bars and IGN B Fuse BCK/UP, BTSI, IGN E, TBC IGN 1, and TRLR BCK/UP Fuses Ignition Switch - ACCY/RUN/START, RUN, and START Bus Bars, IGN A and CRNK Fuses FRT WPR, IGN 0, RAIN, TBC ACC, TBC IG, and TCM Fuses AIR SOL and PCMI Fuses - 4.2L BCK/UP, BTSI, IGN E, TBC IGN 1, and TRLR BCK/UP Fuses Power, Ground, Serial Data, and MIL FRT WPR, IGN 0, RAIN, TBC ACC, TBC IG, and TCM Fuses G108 SP205
Figure 2:	Underhood Fuse Block - PWR/TRN Relay Master Electrical Component List Powertrain Control Module Description Control Module References Engine Data Sensors - 5-Volt and Low Reference Module Power, Ground, Serial Data, and MIL B+ Bus - Underhood Fuse Block
Figure 3:	Engine Data Sensors - 5-Volt and Low Reference Master Electrical Component List Powertrain Control Module Description Control Module References Engine Data Sensors - Pressure and Temperature Underhood Fuse Block - PWR/TRN Relay
Figure 4:	Engine Data Sensors - Pressure and Temperature Master Electrical Component List Air Intake System Description Control Module References Engine Data Sensors - Oxygen Sensors Engine Data Sensors - 5-Volt and Low Reference Underhood Fuse Block - PWR/TRN Relay ETC and O2 SNSR Fuses - 4.2L Gages G108
Figure 5:	Engine Data Sensors - Oxygen Sensors Master Electrical Component List Fuel System Description Control Module References Engine Data Sensors - Throttle Actuator Control and VSS Engine Data Sensors - Pressure and Temperature ETC and O2 SNSR Fuses - 4.2L
Figure 6:	Engine Data Sensors - Throttle Actuator Control and VSS Master Electrical Component List Throttle Actuator Control (TAC) System Description Control Module References Ignition Controls - Ignition Coils Engine Data Sensors - Oxygen Sensors Pressure Controls, Temperature, and VSS Gages
Figure 7:	Ignition Controls - Ignition Coils Master Electrical Component List Electronic Ignition (EI) System Description Control Module References Ignition Controls - Sensors Engine Data Sensors - Throttle Actuator Control and VSS AIR SOL and PCMI Fuses - 4.2L G109 G109 G109 G109 G109 G109 Gages
Figure 8:	Ignition Controls - Sensors Master Electrical Component List Electronic Ignition (EI) System Description Control Module References Fuel Controls - Fuel Pump and Fuel Injectors Ignition Controls - Ignition Coils Engine Controls Schematic Icons Engine Controls Schematic Icons
Figure 9:	Fuel Controls - Fuel Pump and Fuel Injectors Master Electrical Component List Fuel System Description Control Module References Fuel Controls - EVAP Controls Ignition Controls - Sensors Ignition Switch - ACCY/RUN, RUN/START Bus Bars and IGN B Fuse AIR SOL and PCMI Fuses - 4.2L B+ Bus - Underhood Fuse Block `AIR PUMP, EAP, ECM, HDM, HI HEADLAMP - LT, HI HEADLAMP - RT, IGN COILS, LO HEADLAMP - LT, LO HEADLAMP - RT, PCM B AND TBC I Fuses G104, G105, and G107 AIR SOL and PCMI Fuses - 4.2L Fuel Gage G201 - 2 of 2, and G305
Figure 10:	Fuel Controls - EVAP Controls Master Electrical Component List Evaporative Emission Control System Description Control Module References Device Controls - K18 Fuel Controls - Fuel Pump and Fuel Injectors B+ Bus - Underhood Fuse Block AUX PWR 1, RR HVAC, SUNROOF, TBC 2, TBC 3, TBC 4, TBC 5, and TCM CNSTR Fuses
Figure 11:	Device Controls - K18 Master Electrical Component List Secondary Air Injection System Description Control Module References Controlled/Monitored Subsystem References Fuel Controls - EVAP Controls B+ Bus - Underhood Fuse Block Ignition Switch - ACCY/RUN, RUN/START Bus Bars and IGN B Fuse G201 - 2 of 2, and G305 G104, G105, and G107 AIR SOL and PCMI Fuses - 4.2L
Figure 12:	Controlled/Monitored Subsystem References Master Electrical Component List Powertrain Control Module Description Control Module References Transmission Control References - A/T Device Controls - K18 Compressor Controls Compressor Controls Cruise Control Schematics Starting System Charging System Gages Power, Ground, Serial Data, and Transfer Case Encoder Motor Engine Cooling Schematics EBCM Power, Ground, Serial Data, Indicator, and Signal Circuits
Figure 13:	Transmission Control References - A/T Master Electrical Component List Powertrain Control Module Description Control Module References Controlled/Monitored Subsystem References Shift Controls and Stop Lamp Switch Pressure Controls, Temperature, and VSS EBCM Power, Ground, Serial Data, Indicator, and Signal Circuits PNP Switch, 4WD Signal, Serial Data, and Indicator