ENGINE PERFORMANCE – Chevrolet Blazer 2002 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L

4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Blazer 2002

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Blazer 2002:

• (body harn, near blower motor resistor)
• (in exhaust, after catalytic converter)
• (rear of distributor)
• 12v ref
• 3-2 sol
• 5 v ref
• 5v ref
• Abs fuse 22 10a
• Battery
• C red
• Camshaft position sensor
• Ckp sig
• Class 2 data
• Clstr fuse 11 10a
• Clutch pedal position switch (on clutch pedal support bracket)
• Cmp sens
• Cpp sw
• Crankshaft position sensor (front of engine near crankshaft pulley)
• Ect sens
• G103 (right rear of cyl head)
• G105 (left rear of cyl head)
• Ground
• H02s low ref
• Heated oxygen sensor (bank 1 sensor 1) (in left exhaust pipe, front of converter)
• Heated oxygen sensor (bank 1 sensor 2)
• Heated oxygen sensor (bank 2 sensor 1) (in right exhaust pipe, front of converter)
• Ho2s high
• Ho2s low
• Hot in off, run or start
• Hot in run
• I/p fuse block
• Ign 1
• Inj 1
• Inj 2
• Inj 3
• Inj 4 ctrl
• Inj 5
• Inj 6
• Knock sensor (top rear of engine)
• Ks sig
• Low ref
• Nca
• Off/crk/run
• P/n
• Park/neutral position & back-up lamp switch (left side of transmission)
• Pnk
• Powertrain control module (right front of engine compt)
• Red
• S100
• S101
• S102
• S106
• S116
• S138
• S152
• S203
• Stoplamp switch (on brake pedal support bracket)
• Tan
• Tcc sw
• Trans sig a
• Trans sw b
• Trans sw c
• Trans sw p

4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Blazer 2002

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Blazer 2002:

• 1-2 shift sol
• 2-3 shift sol
• 3-2 control sol
• A10
• Automatic transmission
• Automatic transmission fluid pressure manual valve position switch
• B10
• C10
• Central sequential fuel injection
• D10
• D2 sw
• D3 sw
• D4 sw
• E10
• Ecm i fuse 15a
• Eng i fuse 10a
• Evaporative emission canister purge solenoid (top right center of engine)
• Evaporative emission canister vent solenoid (rear of fuel tank)
• Fuel inj
• Hot in run or start
• Lo sw
• Oxygen fuse 20a
• Pnk
• Pressure control solenoid valve
• Red
• Rev sw
• Tan b
• Tcc pwm sol
• Tcc sol
• Transmission fluid temperature sensor
• Under- hood fuse block

4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Blazer 2002

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Blazer 2002:

• (under left side of dash) data link connector
• 12v in
• A/c system
• A11
• A12
• Body control module (under dash, on heater case)
• Ecm b fuse 20a
• Eng spd
• Engine coolant temperature sensor (left cylinder head, between two rear spark plugs)
• Fuel pump & sender assembly (on top of fuel tank)
• Fuel pump prime connector
• Fuel pump relay
• Fuel tank pressure sensor (top of fuel tank)
• G102 (right rear of cylinder head)
• G114 (left rear of cylinder head)
• G402 (left rear crossmember)
• G402 (left rear frame rail)
• Gnd
• Hot at all times
• Instrument cluster
• Instrument cluster system
• Intake air temperature sensor (in fresh air intake duct)
• Maf sig
• Manifold absolute pressure sensor (top center of engine)
• Mass airflow sensor (maf) (on air intake assy)
• Mil input
• Pick-up
• Pick-up utility
• Pnk
• Red
• S152
• S422
• Splice pack 201 (left side of dash)
• Splice pack 422/423 (rear frame rail)
• Tan
• Tan b
• Throttle position sensor (on throttle body assembly)
• Underhood fuse block
• Utility

4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Blazer 2002

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Blazer 2002:

• (not used)
• (right rear of cyl head) g103
• (top rear of automatic transmission) c116 (m-m)
• 1-2 shift
• 12 v ref
• 2-3 shift
• 2wd
• 4wd
• A/c clu
• A/c low
• A/c req
• A/c system
• Anti-lock brake system
• Axle sw
• Cruise control system
• Cruise eng
• Distributor (top rear of engine)
• Electronic ignition control module (top right side of engine)
• Engine spd
• Evap purge
• Evap vent
• Fuel lev
• Fuel pmp rly
• G104 (left rear of cylinder head)
• G105 (left rear of cyl head)
• G117 (left rear of engine compt)
• Gen f
• Gen t/o
• Ground
• H02s htr low
• High voltage coil wire
• Ho2s htr high
• Ho2s htr low
• Iac a hi
• Iac a lo
• Iac b hi
• Iac b lo
• Iat sens
• Ic timing
• Idle air control valve (on throttle body assembly)
• Ign timing sig.
• Ignition coil (right side of engine)
• Ignition feed
• Low ref
• Maf sig
• Map sig
• Mil
• Nca
• Pc sol
• Pnk
• Pnk a
• Powertrain control module (right front of eng compt)
• Red
• S106
• S134
• S140
• S152
• Spark plugs
• Starting/ charging system
• Tach. sig.
• Tan
• Tank pres
• Tcc pwm sol
• Tcc sol
• Tft sensor
• Tp sens
• Trans sig a
• Trans sig c
• Transmission system
• Vehicle speed sensor (rear of transmission)
• Vss
• Vss hi
• Vss low