ENGINE PERFORMANCE – Chevrolet Blazer 1998 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L

4.3L (VIN W), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Blazer 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Blazer 1998:

• (top rear of automatic transmission) c116 (m-m)
• (top right rear of engine) evaporative emissions canister purge solenoid valve
• (upper left side of throttle body) idle air control valve motor
• 1-2 shift sol. ctrl
• 2-3 shift sol. ctrl
• 2wd
• 3-2 ctrl sol. ctrl
• 4wd
• Anti-lock brakes system
• Auto 4wd
• Cam posit sens rtn
• Cam posit sens sig
• Camshaft position sensor (side of distributor)
• Crank posit sens sig
• Crankshaft position sensor (behind right side of engine crankshaft pulley)
• Ect sens input
• Egr posit input
• Evap can vent valve
• G114 (left rear of engine)
• G117 (right rear of engine)
• Hall effect sensor
• Iat temp sens sig
• Idle air ctrl (iac) a hi
• Idle air ctrl (iac) b lo
• Inj no.1 ctrl
• Inj no.2 ctrl
• Inj no.3 ctrl
• Inj no.4 ctrl
• Inj no.5 ctrl
• Inj no.6 ctrl
• Knock sens sig
• Knock sensor (top center of engine)
• Left front heated oxygen sensor
• Left sens hi
• Left sens lo
• Man. 4wd
• Map sens input
• Mass air flow sens
• Nca
• Pnk
• Pnk c
• Pnk pnk
• Post-catalyst sens hi
• Post-catalyst sens lo
• Rear whl speed out
• Right front heated oxygen sensor
• Right sens hi
• Right sens lo
• S140
• S151
• Tach out
• Tan
• Tcc on/off sol. ctrl
• Tcc pwm sol ctrl
• Throttle posit sens
• Trans temp sens sig
• Twisted wire pair
• Vapor press
• Vehicle control module (vcm) (right side of engine compt)
• Vehicle speed sensor (rear of transfer case or transmission)
• Vss rtn
• Vss signal

4.3L (VIN W), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Blazer 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Blazer 1998:

• 1-2 shift sol.
• 2-3 shift sol.
• 3-2 control sol.
• Automatic transmission
• Automatic transmission fluid pressure manual valve position switch
• B10
• C10
• D10
• D2 sw
• D3 sw
• D4 sw
• E10
• Ecm b fuse 20a
• Ecm i fuse 15a
• Eng i fuse 10a
• Evaporative emission canister vent valve (near fuel tank)
• Exhaust gas recirculation valve (top front of engine)
• F10
• Fuel inj. no1
• Fuel inj. no2
• Fuel inj. no3
• Fuel inj. no4
• Fuel inj. no5
• Fuel inj. no6
• Hot at all times
• Hot in run or start
• Lo sw
• Nca
• Oxygen fuse 20a
• Pnk
• Pnk pnk
• Pnk pnk pnk
• Post-converter heated oxygen sensor (in exhaust, behind catalytic converter)
• Pressure control solenoid valve
• Red
• Rev sw
• S150
• Tan
• Tcc on/off sol.
• Tcc pwm sol.
• Transmission fluid temperature sensor
• Under- hood bussed electrical center

4.3L (VIN W), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Blazer 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Blazer 1998:

• (eng harn, 6cm from linear egr valve sol breakout)
• (eng harn, 8 cm from
• (not used)
• 12v in
• 5v ref
• A/t
• A10
• A11
• Cruise control system
• D (p/u)
• Ecm b fuse 20a
• Engine coolant temperature sensor (left cylinder head, between 2 rear spark plugs)
• Fuel level sensor/ fuel pump (fuel tanl)
• Fuel pump relay
• Fuel pump switch/ engine oil pressure gauge sensor (near distributor)
• Fuel tank vapor pressure sensor (fuel tank)
• G114 (left rear of engine)
• G416 (left rear crossmember)
• G416 (left rear frame rail)
• Gauge input oil pressure
• Generator breakout) s102
• Gnd
• Hot at all times
• Input odometer speedometer &
• Instrument cluster
• Intake air temperature sensor (in air intake duct assy)
• M (utility)
• M/t
• Maf sig
• Manifold absolute pressure sensor (top center of engine)
• Manual trans clutch start switch (clutch pedal bracket)
• Mass air flow sensor (maf) (in air intake assy)
• Mil (check engine) input
• Pick-up
• Pnk
• Pnk pnk pnk
• Red
• Rtn
• S100 (eng harn, 30cm from vcm breakout)
• S101
• S106
• S152
• Splice pack 422/423 (left side of dash)
• Splice pack sp202 (center of dash)
• Tachometer input
• Tan
• Tan a
• Throttle position sensor (on throttle body assembly)
• Underhood bussed electrical center
• Utility
• Vapor

4.3L (VIN W), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Blazer 1998

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Blazer 1998:

• (center of dash) splice pack sp200
• (m/t only)
• (under left side of dash) data link connector
• 2wd
• 4wd
• 4wd f whl lock in
• 4wd fuse 15 10a
• 4wd low ind sig
• 5v ref. voltage
• 5v return
• A/c comp relay ctrl
• A/c request (hi)
• A/c request (lo)
• A12
• Abs fuse 22 10a
• Air conditioning system
• Anti-lock brakes system
• Brake switch input
• Check eng lp out
• Clstr fuse 11 10a
• Cpp sw sig in
• Cruise control system
• Cruise engaged sig
• Distributor (top rear of engine)
• Egr valve hi
• Egr valve lo
• Electronic ignition control module (top right side of engine)
• Est output sig
• Evap cann sol ctrl
• Fuel level sig in
• Fuel pump rly ctrl
• Fused ign
• Fused ign (run)
• Fused ign (run/start)
• G114 (left rear of engine)
• Gen ctrl
• Ground
• High voltage coil wire
• Hot in off, run or start
• Hot in run
• I/p fuse block
• Ign timing sig.
• Ignition coil (top right side of engine)
• Ignition feed
• Instrument cluster system
• Nca
• P/n
• Pnk
• Pnk a
• Power b(+)
• Press ctrl sol lo
• Press ctrl sol. hi
• Prndl a sig in
• Prndl b sig in
• Prndl c sig in
• Prndl p sig in
• Red
• S106
• S113
• S138 (body harn, near wiper breakout)
• S152
• Sensor grd
• Serial data class ii
• Serial data sig
• Spark plugs
• Splice pack 201 (left side of dash)
• Splice pack sp200 (center of dash)
• Starting/ charging system
• Tach. sig.
• Trans press sig-bit 1
• Trans press sig-bit 2
• Trans press sig-bit 3
• Transmission range switch (left side of transmission)
• Transmissions system
• Truck body control module (behind dash, on heater)
• Vcm grd
• Vehicle control module (vcm) (right side of engine compt)
• Vss sig