ENGINE PERFORMANCE – Chevrolet Impala 2003 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.4L VIN E

3.4L VIN E, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Impala 2003

List of elements for 3.4L VIN E, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Impala 2003:

• (left rear of engine, below icm)
• (on brake pedal support) stoplamp switch
• (on transaxle stud)
• (pin 14-15 not used)
• (pin 2-3 not used)
• (pin 23-27 not used)
• (pin 34-37 not used)
• (pin 39-42 not used)
• (pin 49-52 not used)
• (pin 66-67 not used)
• (pin 74-75 not used)
• (pin 77-78 not used)
• 1-2 shift sol
• 2-3 shift sol
• 24x ckp sens
• 3x ref high
• 3x ref low
• A/c press sens
• A/t fluid temp
• Abs/ pcm fuse 10a
• Battery
• Bypass
• Cmp signal
• Cooling fans system
• Crankshaft position sensor (7x) (lower right side of engine)
• Cruise disable
• Dfi fuse 15a
• Ebcm feed
• Egr control
• Egr sens
• Evap purge
• Fuel inj 1
• Fuel inj 2
• Fuel inj 3
• Fuel inj 5
• Fuel inj 6
• Fuel inj fuse 15a
• Fuel injectors
• G113
• G117
• High speed fan
• Ho2s 2 low
• Ho2s low
• Hot at all times
• Hot in on or start
• Iac b high
• Iat sens
• Ic control
• Ignition
• Ignition control module (top center rear of engine)
• Iss sens high
• Iss sens low
• Knock sens
• Left i/p junction block (left end of dash)
• Low ref
• Low speed fan
• Maf sens
• Map 5v ref
• Map sens
• Pcm fuse 15a
• Pcm ground
• Pcm,bcm/ cluster fuse 10a
• Pnk
• Pnk b
• Powertrain control module (pcm) (in air cleaner box)
• S106
• S109
• S158
• Serial data
• Spark plugs
• Tan
• Tcc brake sw
• Tp sens
• Tr switch b
• Trans sol fuse 10a
• Underhood junction block (bottom) (right side of engine compt)
• Underhood junction block (top) (right side of engine compt)
• Vss high
• Vss low
• Vss output

3.4L VIN E, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Impala 2003

List of elements for 3.4L VIN E, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Impala 2003:

• (below left side of dash, right of steering column) data link connector
• (engine harn, below intake plenum)
• 1-2 shift solenoid valve
• 2-3 shift solenoid valve
• A/c refrigerent pressure sensor (below accumulator)
• Automatic transaxle
• Automatic transaxle fluid pressure manual valve position switch
• Automatic transaxle temperature sensor
• Body control module (left side of dash)
• C113
• Cruise control module (left strut tower)
• E pnk
• Electronic brake control module (left rear of engine compt)
• Engine coolant temperature (ect) sensor (near coolant outlet, left rear of eng)
• Knock sensor (bank 1) (lower left rear of engine, below exhaust manifold)
• Manifold absolute pressure sensor (on intake plenum)
• Pnk
• Pressure control solenoid valve
• Red
• S121
• S217 (i/p harn, near bcm breakout)
• Splice pack sp205 (taped to harn, left end of dash)
• Tan
• Tcc
• Tcc pulse width modulation solenoid
• Throttle position (tp) sensor (on throttle assembly)
• Transaxle input shaft speed sensor
• Vehicle speed sensor (right rear of engine compt, end of transaxle)

3.4L VIN E, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Impala 2003

List of elements for 3.4L VIN E, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Impala 2003:

• (in exhaust manifold, rear of engine) heated oxygen sensor 1
• (in exhaust, behind catalytic converter) heated oxygen sensor 2
• (left side of brake pedal bracket) g203
• (on transaxle stud)
• (right end of dash)
• A tan
• B12
• C10
• D pnk
• D11
• Eng devices fuse 10a
• Engine oil level switch (on oil pan)
• Engine oil pressure indicator switch (above starter)
• Evap canister purge solenoid (top rear of engine)
• F/pmp rly fuse 15a
• Fuel pump and sender assembly
• Fuel pump relay
• Fuel pump/ level sensor
• Fuel tank pressure sensor
• G113
• G117
• G302 (base of
• Hot at all times
• Hot in on or start
• Mass airflow sensor (in air intake plenum)
• Nca
• Oxy sen fuse 15a
• Pnk
• Pnk a
• Pnk c
• Right "a" pillar)
• Right i/p junction block c1
• S106
• S157
• S158
• S174
• Tan
• Underhood junction block (bottom) (right side of engine compt)
• Underhood junction block (top) (right side of engine compt)

3.4L VIN E, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Impala 2003

List of elements for 3.4L VIN E, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Impala 2003:

• (left rear wheelwell)
• (pin 12-15 not used)
• (pin 20-22 not used)
• (pin 40-41 not used)
• (pin 47-48 not used)
• (pin 51-54 not used)
• (pin 64-65 not used)
• (pins 36,38 not used)
• 5v ref a
• 5v ref b
• A/c clutch rly
• A/c refrig press
• A/c system
• Abs/ pcm fuse 10a
• Automatic transaxle
• C10
• C113
• Camshaft position sensor (left front of engine, below intake plenum)
• Ckp sens
• Cmp sens
• Crank rly
• Crankshaft position sensor (24x) (at end of crankshaft)
• Cruise status
• D11
• Ebcm feed
• Ect sens
• Egr pos signal
• Egr val cntrl
• Evap can vent
• Evap canister vent solenoid
• Exhaust gas recirculation (egr) valve (top rear rear of engine)
• Ftp sens
• Ftp sens
• Fuel inj 4
• Fuel level sens
• Fuel pump relay
• G113
• Generator
• Generator l term
• Ho2s 1 high
• Ho2s 2 high
• Ho2s htr low
• Hot in on or start
• Hot in start
• Iac a high
• Iac valve a low
• Iac valve b
• Iat sens
• Idle air control (iac) valve (on throttle body)
• Ignition
• Instrument panel cluster
• Intake air temperature (iat) sensor (in air intake duct)
• Left i/p junction block (left end of dash)
• Low ref
• Malfunction indicator lamp
• Map sens
• Mil control
• Oil level sw
• Oil press sw
• Pc sol high
• Pc sol low
• Pcm (crank) fuse 10a
• Pcm crank pwr
• Pcm,bcm/ cluster fuse 10a
• Pnk
• Powertrain control module (pcm) (in air cleaner box)
• Red
• Red b
• Red e
• S106
• S169 (w/ abs)
• Starting system
• Tan
• Tan b
• Tcc pwm sol
• Tcc release sw
• Tft sens
• Tp sens
• Tr switch c
• Tr switch d
• Tr switch p
• Trans- mission internal mode switch

3.8L VIN K

3.8L VIN K, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Impala 2003

List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (1 of 4) for Chevrolet Impala 2003:

• (ign harn, top of eng, near icm)
• (left rear of engine, below icm)
• (on brake pedal support) stoplamp switch
• (pin 14-15 not used)
• (pin 2-3 not used)
• (pin 23-27 not used)
• (pin 35-37 not used)
• (pin 39-42 not used)
• (pin 49-52 not used)
• (pin 66-67 not used)
• (pin 74-75 not used)
• (pin 77-78 not used)
• 1-2 shift sol
• 18x ref
• 2-3 shift sol
• 3x ref
• A/c press sens
• A/t fluid temp
• Abs/ pcm fuse 10a
• Bank 1 ks sig
• Bank 2 ks sig
• Battery
• Bypass
• Camshaft position (cmp) sensor (right side of engine)
• Cmp signal
• Cooling fans system
• Crankshaft position (ckp) sensor (at end of crankshaft)
• Cruise disable
• Dfi mdl fuse 15a
• Ebcm feed
• Ect sens
• Egr control
• Egr sens
• Evap purge
• Fuel inj 1
• Fuel inj 2
• Fuel inj 4
• Fuel inj 5
• Fuel inj 6
• Fuel inj fuse 15a
• Fuel injectors
• G113
• High speed fan
• Ho2s 1 low
• Ho2s 2 low
• Hot at all times
• Hot in on or start
• Iac b high
• Iat sens
• Ign control
• Ignition
• Ignition control module (top left front of eng)
• Iss sens high
• Iss sens low
• Left i/p junction block (left end of dash)
• Low speed fan
• Maf sens
• Map 5v ref
• Map sens
• Not used
• Pcm fuse 15a
• Pcm ground
• Pcm,bcm/ cluster fuse 10a
• Pnk
• Pnk p
• Powertrain control module (pcm) (in air cleaner box)
• Ref low
• S106
• S109
• S144
• S145
• Serial data
• Spark plugs
• Tan
• Tcc brake sw
• Tp sens
• Tr switch b
• Trans sol fuse 10a
• Underhood junction block (bottom) (right side of engine compt)
• Underhood junction block (top) (right side of engine compt)
• Vss high
• Vss low
• Vss output

3.8L VIN K, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Impala 2003

List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (2 of 4) for Chevrolet Impala 2003:

• (below left side of dash, right of steering column) data link connector
• (i/p harn, near bcm breakout) s217
• 1-2 shift solenoid valve
• 2-3 shift solenoid valve
• A/c refrigerent pressure sensor (below accumulator)
• Automatic transaxle
• Automatic transaxle fluid pressure manual valve position switch
• Automatic transaxle input shaft speed sensor
• Automatic transaxle temperature sensor
• Body control module (left side of dash)
• C113
• Cruise control module (left strut tower)
• E pnk
• Electronic brake control module (left rear of engine compt)
• Engine coolant temperature (ect) sensor (below coolant outlet, left rear of eng)
• Knock sensor bank 1 (lower left side of engine, near starter)
• Knock sensor bank 2 (lower right side of engine)
• Manifold absolute pressure sensor (on intake plenum)
• Pnk
• Pressure control solenoid valve
• Red
• Splice pack sp205 (taped to harn, left end of dash)
• Tan
• Tcc
• Tcc pulse width modulation solenoid
• Throttle position (tp) sensor (on throttle assembly)
• Vehicle speed sensor (right rear of engine compt, end of transaxle)

3.8L VIN K, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Impala 2003

List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (3 of 4) for Chevrolet Impala 2003:

• (engine harn, right front of engine near c112)
• (in exhaust manifold, rear of engine) heated oxygen sensor 1
• (in exhaust, post catalytic converter) heated oxygen sensor 2
• (left side of brake pedal bracket) g203
• (on transaxle stud)
• A tan
• B12
• C10
• D pnk
• D11
• Eng devices fuse 10a
• Evap canister purge solenoid (top front of engine)
• F/pmp rly fuse 15a
• Fuel pump and sender assembly
• Fuel pump relay
• Fuel pump/ level sensor
• Fuel tank pressure sensor
• G113
• G302 (base of
• Hot at all times
• Hot in on or start
• Mass airflow sensor (top of throttle body)
• Nca
• Of dash)
• Oxy sen fuse 15a
• Pnk
• Pnk a
• Pnk c
• Right "a" pillar)
• Right i/p junction block (right end c1
• S106
• S131
• S157
• S158
• S174
• Tan
• Under- hood junction block (bottom) (right side of engine compt)
• Underhood junction block (top) (right side of engine compt)

3.8L VIN K, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Impala 2003

List of elements for 3.8L VIN K, Engine Performance Wiring Diagram (4 of 4) for Chevrolet Impala 2003:

• (on transaxle stud)
• (pin 12-15 not used)
• (pin 20-22 not used)
• (pin 36-38 not used)
• (pin 40-41 not used)
• (pin 47-48 not used)
• (pin 51-54 not used)
• (pin 64-65 not used)
• (pin 70-74 not used)
• 5v ref a
• 5v ref b
• A/c clutch rly
• A/c refrig press
• A/c system
• Abs/ pcm fuse 10a
• Automatic transaxle
• C10
• C113
• Crank rly
• Cruise status
• D11
• Ebcm feed
• Ect sens
• Egr pos signal
• Egr val cntrl
• Engine oil level switch (on oil pan)
• Engine oil pressure indicator switch (above starter)
• Evap can vent
• Evap canister vent solenoid (left rear wheelwell)
• Exhaust gas recirculation (egr) valve (top right rear of engine)
• Ftp sens
• Ftp sens
• Fuel inj 3
• Fuel level sens
• Fuel pump relay
• G113
• Generator
• Generator l term
• Ho2s 1 high
• Ho2s 2 high
• Hot in on or start
• Hot in start
• Iac a high
• Iac valve a low
• Iac valve b
• Iat sens
• Idle air control (iac) valve (on throttle body assembly)
• Ignition
• Instrument cluster
• Intake air temperature (iat) sensor (in air intake duct)
• Left i/p junction block (left end of dash)
• Malfunction indicator lamp
• Map sens
• Mil control
• Oil level sw
• Oil press sw
• Pc sol high
• Pc sol low
• Pcm (crank) fuse 10a
• Pcm crank pwr
• Pcm,bcm/ cluster fuse 10a
• Pnk
• Powertrain control module (pcm) (in air cleaner box)
• Red
• Red b
• Red e
• S106
• S169 (w/ abs)
• Starting system
• Tan
• Tan b
• Tcc pwm sol
• Tcc release sw
• Tft sens
• Tp sens
• Tr switch c
• Tr switch d
• Tr switch p
• Trans- mission internal mode switch