ENGINE PERFORMANCE – Chevrolet Blazer 1997 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L

4.3L (VIN W), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Blazer 1997

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Blazer 1997:

• (oxygen sensor harn, 10cm from 4-pin conn joining oxygen sensor extension harn)
• (rear of right cylinder head)
• (top right center 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
• 3-2 ctrl sol. ctrl
• A/c comp rly ctrl
• Air conditioning system
• Anti-lock brakes system
• 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
• Egr valve ctrl
• Evap can vent valve
• Evap sol purge ctrl
• G114 (rear of left cylinder head)
• G117
• 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 left rear of engine)
• Left front heated oxygen sensor
• Left sens hi
• Left sens lo
• Map sens input
• Mass air flow sens
• Nca
• Pnk
• Pnk c
• Pnk pnk pnk pnk pnk
• Post-catalyst sens hi
• Post-catalyst sens lo
• Power
• Pre-catalyst sens hi
• Pre-catalyst sens lo
• Pre-converter heated oxygen sensor
• Rear whl speed out
• Right front heated oxygen sensor
• Right sens hi
• Right sens lo
• S106
• S112
• S140
• S317
• S318
• Tan
• Tcc on/off sol. ctrl
• Tcc pwm sol ctrl
• Throttle posit sens
• Trans temp sens sig
• Twisted wire pair
• Vapor press
• Vcm ground
• Vehicle control module (vcm) (right side of engine compt)
• Vehicle speed sensor (rear of transmission)
• Vss rtn
• Vss signal

4.3L (VIN W), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Blazer 1997

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Blazer 1997:

• 1-2 shift sol.
• 2-3 shift sol.
• 3-2 control sol.
• Automatic transmission
• Automatic transmission fluid pressure manual valve position switch
• D2 sw
• D3 sw
• D4 sw
• Ecm ign fuse 10 20a
• Eng fuse 5 20a
• Evaporative emission canister vent valve (near fuel tank)
• Exhaust gas recirculation valve (top front of engine)
• Fuel inj. no.1
• Fuel inj. no.2
• Fuel inj. no.3
• Fuel inj. no.4
• Fuel inj. no.5
• Fuel inj. no.6
• Hot in run or start
• I/p fuse block
• Lo sw
• Nca
• Pnk
• Pnk pnk pnk tan
• Post-converter heated oxygen sensor
• Pressure control solenoid valve
• Red
• Rev sw
• S105
• S107
• Tan
• Tcc on/off sol.
• Tcc pwm sol.
• Transmission fluid temperature sensor

4.3L (VIN W), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Blazer 1997

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Blazer 1997:

• (eng harn, 6cm from linear egr valve sol breakout)
• (eng harn, 8cm from generator breakout)
• (left rear of chassis on crossmember) g416
• 12v in
• 5v ref
• Ecm batt fuse 9 20a
• Engine coolant temperature sensor (top front of engine, in thermostat housing)
• Fuel level sensor/ fuel pump (inside fuel tank)
• Fuel pump prime connector (left rear of engine compt)
• Fuel pump relay
• Fuel pump switch/ engine oil pressure gauge sensor (near distributor)
• Fuel tank vapor pressure sensor
• G114 (rear of left cylinder head)
• G117 (rear of right cylinder head)
• Gauge input oil pressure
• Gauges fuse 4 10a
• Gnd
• Hot at all times
• Hot in off, run or start
• Hot in run or start
• I/p fuse block
• Input fuel gauge
• Input odometer speedometer &
• Instrument cluster
• Intake air temperature sensor (left front of engine compt)
• Maf sig
• Malfunction indicator lamp (mil)
• Manifold absolute pressure sensor (top right side of engine)
• Mass air flow sensor (maf) (left front of engine compt)
• Pickup
• Pnk
• Red
• Relay center (left side of i/p)
• Rtn
• S100 (eng harn, 30cm from vcm breakout)
• S101
• S102
• S106
• S108
• S209
• S213 pnk
• S220
• S241
• S250 (dash harn, 13cm from 4wd ind breakout)
• S266
• Shift indicator (w/ m/t)
• Tachometer input
• Tan
• Tan a
• Throttle position sensor
• Trans fuse 24 10a
• Utility
• Vapor

4.3L (VIN W), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Blazer 1997

List of elements for 4.3L (VIN W), Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Blazer 1997:

• (i/p harn, 21cm from 6-pin conn breakout at right side of i/p)
• (rear of left cylinder head)
• (rear of right cylinder head)
• 4wd f whl lock in
• 4wd low ind sig
• 5v ref b
• 5v ref. voltage
• 5v return
• A/c request (hi)
• A/c request (lo)
• Air conditioning system
• Anti-lock brakes system
• Brake switch input
• Bravada
• Check eng lp out
• Cpp sw in
• Cruise control system
• Cruise control system, sound system & transfer case circuit
• Cruise engaged sig
• Data link connector (dlc-partial) (lower left side of i/p)
• Distributor (top rear of engine)
• Driver's information display center
• Electronic ignition control module (top right of engine)
• Est output sig
• Front axle switch (right of differential)
• Fuel level buffer module (under glove box)
• Fuel level d
• Fuel level mod out
• Fuel level rtn
• Fuel pump rly ctrl
• Fused ign (run)
• Fused ign (run/start)
• G114
• G117
• Gauge ctrl l
• Ground
• High voltage coil wire
• Hot in run
• I/p fuse block
• Ign timing sig.
• Ignition coil (top right side of engine)
• Ignition feed
• M4 brake fuse 12 10a n3
• Mod out m
• Pnk
• Pnk a
• Power a
• Power b(+)
• Press ctrl sol lo
• Press ctrl sol. hi
• Red
• S109
• S227 (front of dash, 8cm from data link connector breakout)
• S238 (dash harn, 11cm from tcc brake switch breakout)
• S239
• S298
• Sensor in c
• Serial data sig
• Service circuit-power
• Shift ind ctrl
• Spark plugs
• Tach. sig.
• Trans press sig-bit 1
• Trans press sig-bit 2
• Trans press sig-bit 3
• Transfer case circuit
• Utility
• Vehicle control module (vcm) (right side of engine compt)
• Vss in
• Vss sig