ENGINE PERFORMANCE – Chevrolet Astro 1999 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

4.3L

4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Astro 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Astro 1999:

• (eng harn, 6cm from trans breakout toward front of eng)
• (engine harn, 26 cm from vcm conn c1 breakout)
• (engine harn, 5 cm from vcm conn c1 breakout)
• (on frame rail by fuel filter) evaporative emission canister vent valve
• (on left rear of throttle body) idle air control valve
• 1-2 shift sol. ctrl
• 2-3 shift sol. ctrl
• 3-2 ctrl sol. ctrl
• Bank no1 heated oxygen sensor n 1 (left front exhaust y-pipe)
• Bank no2 heated oxygen sensor no1 (right front exhaust y-pipe closest to exhaust manifold)
• Cam posit sens rtn
• Cam posit sens sig
• Camshaft position sensor (side of distributor)
• Crank posit sens sig
• Crankshaft position sensor (behind and to right of engine crankshaft pulley)
• Ect sens input
• Egr pintle pos
• Evap can vent valve
• Fuel lev output
• G114 (left rear of engine block, next to knock sensor)
• G201 (right side of dash, above blower motor)
• Hall effect sensor
• Iat temp sens sig
• Idle air ctrl (iac) a hi
• Idle air ctrl (iac) b lo
• Inj 1 ctrl
• Inj 2 ctrl
• Inj 3 ctrl
• Inj 4 ctrl
• Inj 5 ctrl
• Inj 6 ctrl
• Instrument cluster system
• Knock sens sig
• Knock sensor (left rear of distributor on engine block)
• Left sens hi
• Left sens lo
• Map sens input
• Mass air flow sens
• Nca
• Pnk
• Pnk c
• Post-catalyst sens hi
• Post-catalyst sens lo
• Right sens hi
• Right sens lo
• S124
• S126
• S127
• S151
• S152
• Tan
• Tank vac sig
• Tcc on/off sol. ctrl
• Tcc pwm sol ctrl
• Throttle posit sens
• Trans temp sens sig
• Twisted wire pair
• Vehicle control module (vcm) (left side of engine compartment)
• Vehicle spd sense sig
• Vehicle speed sensor (rear of transmission)
• Vss rtn
• Vss signal

4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Astro 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Astro 1999:

• (engine harn, 26.5 cm from vcm conn c1 breakout)
• 1-2 shift sol.
• 2-3 shift sol.
• 3-2 control sol.
• Automatic transmission
• Automatic transmission fluid pressure manual valve position switch
• Bank no1 heated oxygen sensor no3 (exhaust pipe, between catalytic converter & muffler)
• D2 sw
• D3 sw
• D4 sw
• Ecm-1 fuse 20a
• Eng-1 fuse 20a
• Evaporative emissions canister purge solenoid valve (top of engine, next to map sensor)
• 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
• Linear egr valve solenoid (top of engine, left of generator)
• Lo sw
• Nca
• Pnk
• Pressure control solenoid valve
• Red
• Rev sw
• S116
• S119
• S123
• S153
• Tan
• Tcc on/off sol.
• Tcc pwm sol.
• Transmission fluid temperature sensor
• Underhood fuse/relay center

4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Astro 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Astro 1999:

• (eng harn, 6cm from generator breakout, toward rear of eng)
• (eng harn, 6cm from linear egr valve sol breakout)
• (right side of dash, above blower motor) g201
• (right side of left frame rail) g113
• 12v in
• B14
• B17
• Ecm b f11
• Engine coolant temperature sensor (on side of linear egr valve solenoid, top of engine)
• Fuel pump & sender (inside fuel tank)
• Fuel pump relay
• Fuse 20a
• G12
• G134 (thermostat housing)
• 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 odometer speedometer &
• Instrument cluster
• Intake air temperature sensor (top of air intake duct)
• Maf sig
• Malfunction indicator lamp (mil)
• Manifold absolute pressure sensor (top of engine, near ignition coil)
• Mass air flow sensor (maf) (front of air intake duct)
• Oil pressure switch & sender (on top rear of engine)
• Pnk
• Red
• S109
• S111
• S117
• S118
• S120
• S122 (eng harn, 12cm from generator breakout)
• S213
• Tan
• Tan a
• Throttle position sensor (top of engine, left side of throttle body)
• Trans fuse 20 10a
• Underhood fuse/relay center

4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Astro 1999

List of elements for 4.3L VIN W, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Astro 1999:

• (eng harn, 10cm from bulkhead conn left side of dash)
• (eng harn, 4cm from under- hood fuse/relay center breakout)
• (front of dash, 32cm from lamp harn breakout) s130
• (i/p harn, 4cm from cluster breakout)
• 5v ref. voltage
• 5v return
• A/c relay ctrl
• A/c request (hi)
• A/c request (lo)
• Air conditioning system
• Brake sw input
• Brake switch input
• C217
• Check eng lp out
• Compass & temperature display module
• Convenience center (left side of i/p fuse block, by kick panel)
• Cruise control module (center front of dash, left of windshield wiper module)
• Cruise engaged
• Cruise engaged sig
• Data link connector (dlc-partial) (lower left side of dash)
• Distributor (top rear of engine)
• Egr pos voltage
• Egr valve ctrl
• Electronic brake control module (left front side of frame, left of transmission)
• Est output sig
• Fuel level input
• Fuel pump rly ctrl
• Fused ign (run)
• Fused ign (run/start)
• G114 (left rear of eng block next to knock sensor)
• Ground
• High voltage coil wire
• Hot in run
• I/p fuse block
• Ign input
• Ign timing sig.
• Ignition coil (top of engine, behind generator)
• Ignition control module (top of engine, front of coil)
• Ignition feed
• M4 brake fuse 18 10a n3
• Nca
• Overhead console
• Pnk
• Pnk a
• Power b(+)
• Press ctrl sol lo
• Press ctrl sol. hi
• Radio
• Red
• S112
• S113 (eng harn, 10cm from underhood fuse/relay center breakout)
• S114
• S117
• S218
• S233 (i/p harn, 6.5 cm from dlc)
• Serial data sig
• Spark plugs
• Tach. sig.
• Trans press sig-bit 1
• Trans press sig-bit 2
• Trans press sig-bit 3
• Vehicle control module (vcm) (left side of engine compartment, side of battery)
• Vss in
• Vss input
• Vss sig
• Vss signal