ENGINE PERFORMANCE – Chevrolet Astro 2003 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L VIN X

4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Astro 2003

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Astro 2003:

• (under left side of dash) data link connector
• 3-2 ss
• Battery
• Body control module (above radio)
• Brake sw
• Central sequential fuel injection
• Ckp +12v
• Ckp low ref
• Ckp sig
• Cls 2 data
• Cmp low ref
• Cmp sig
• Crankshaft position sensor (behind and to the right of pulley)
• Ecm-b fuse 20a
• Ecm-i fuse 20a
• Ect +5v
• Ect low ref
• Engine coolant temperature sensor (on left side of left cylinder head)
• Ftp sens +5v
• G105 (on thermostat housing)
• G106 (left rear of engine)
• Ground
• Ho2s 1,1 hi
• Ho2s 1,1 lo
• Ho2s 1,2 hi
• Ho2s 1,2 lo
• Ho2s 2,1 hi
• Ho2s 2,1 lo
• Hot at all times
• Hot in run & start
• I/p fuse block
• Ignition
• Injector 1
• Injector 2
• Injector 3
• Injector 4
• Injector 5
• Injector 6
• Knock sensor (left rear of distributor)
• Ks return
• Ks sig
• Map +5v
• Map low ref
• Nca
• Pnk
• Powertrain control module (on left side of firewall)
• Prnd a
• Prnd b
• Prnd p
• Range b
• Range c
• Red
• S109
• S115
• S116
• S123
• S127
• S155
• Sens low ref
• Sp261 (behind data link connector)
• Tan
• Tft low ref
• Tps +5v
• Tps low ref
• Trans fuse 20 10a
• Underhood fuse block

4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Astro 2003

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Astro 2003:

• (body harn, 6 cm from courtesy/ reading lamp)
• (in fuel tank) fuel pump & sender assembly
• (in fuel tank) fuel tank pressure sensor
• (not used)
• Camshaft position sensor (on side of distributor)
• Eng-1 fuse 20a
• Fuel pump relay
• G104 (center of dash)
• G105 (in thermostat housing)
• G302 (on the left rear side of frame
• Heated oxygen sensor (bank 1 sensor 1) (left front exhaust y-pipe)
• Heated oxygen sensor (bank 1 sensor 2) (on exhaust, between muffler & converter)
• Heated oxygen sensor (bank 2 sensor 1) (right front exhaust y-pipe)
• Hot in run & start
• Nca
• Park/ neutral position switch (left center of trans)
• Pnk
• Red
• S117
• S119
• S308
• Tan
• Throttle position sensor (left side of throttle body)
• Underhood fuse block

4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Astro 2003

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Astro 2003:

• 1-2 sol
• 2-3 sol
• 3-2 sol
• A/t fluid pressure manual valve position switch
• Anti-lock brakes system
• Automatic transaxle
• Brake fuse 18 10a
• Evaporative canister purge solenoid (top of engine, near map sensor)
• Evaporative canister vent valve (underside of vehicle, at fuel filter)
• G105 (in thermostat housing)
• Hot in run
• I/p fuse block
• Manifold absolute pressure sensor (top of engine, near ign coil)
• Mass airflow sensor (front of air intake duct)
• Pc sol valve
• Pnk
• Pnk a
• Red
• Rev
• S112 (engine harn 15 cm from fuse block breakout)
• S117
• Stop- light switch (above brake pedal)
• Tan
• Tcc pmw sol
• Tcc sol
• Tft sensor

4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Astro 2003

List of elements for 4.3L VIN X, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Astro 2003:

• (in thermostat housing) g105
• 1-2 ss
• 2-3 ss
• A/c clu
• A/c req
• A/c system
• Abs system (speed signal)
• Air intake duct)
• Cmp +12v
• Coil driver
• Coil wire
• Cruise control system
• Cruise control system (speed signal)
• Cruise eng
• Cyc sw in
• Distributor
• Evap purge
• Evap vent
• Ftp sens sig
• Fuel lev
• Fuel pmp
• G106 (left rear of engine)
• G107 (left rear of engine)
• Gen f duty sig
• Gen l
• Gnd
• Ground
• Ho2s 1,1 htr
• Ho2s 1,2 htr
• Ho2s 2,1 htr
• Hot at all times
• I/p fuse block
• Iac coil a hi
• Iac coil a lo
• Iac coil b hi
• Iac coil b lo
• Iat low ref
• Iat sig
• Ic timing ctrl
• Idle air control valve (left rear of throttle body)
• Ign
• Ignition coil
• Ignition control module (top of engine) front of coil)
• Instrument panel cluster
• Intake air temperature sensor (top of
• Logic
• Maf sens sig
• Malfunction indicator lamp
• Map sig
• Mil ctrl
• Pc sol hi
• Pc sol lo
• Pnk
• Powertrain control module (left side of firewall)
• Prnd c
• Radio batt fuse 19 10a
• Red
• S127
• S155
• Starting/charging system
• Tan
• Tcc pwm
• Tcc sol
• Tft sens sig
• Timing
• Tp sig
• Trans rng a
• Vehicle speed sensor (rear of transmission)
• Vss high
• Vss low
• Vss out