ENGINE PERFORMANCE – Buick Regal GSE 1999 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.8L

3.8L VIN 1, Engine Performance Wiring Diagrams (1 of 4) for Buick Regal GSE 1999

List of elements for 3.8L VIN 1, Engine Performance Wiring Diagrams (1 of 4) for Buick Regal GSE 1999:

• (ign harn, top of eng, near ign control module)
• (not used)
• (on trans- axle stud)
• (pin 11 not used)
• (pin 14-15 not used)
• (pin 21 & 23-27 not used)
• (pin 40-42 not used)
• (pin 49-52 not used)
• (pin 66-67 not used)
• (top front of engine)
• 1-2 ss valve control
• 18x ref signal
• 2-3 ss valve control
• 3x ref signal
• A/t iss sensor high
• A/t iss sensor low
• Bank 1 knock sensor (left side of eng, in front of starter)
• Bank 2 knock sensor (right side of eng, below exhaust manifold)
• Camshaft position sensor (cmp) (front of eng, above crankshaft pulley)
• Cmp signal
• Cooling fans system
• Crankshaft position sensor (ckp) (front of eng, behind harmonic balancer)
• Cruise control system
• Cruise disable output
• Data link connector (dlc) (under left side of dash, right of steering column)
• Ecm fuse 10a
• Ect sensor signal
• Egr val control (gnd)
• Elek ign fuse 15a
• Eng emis fuse 10a
• Evap purge val control
• F/injr fuse 15a
• F/pump speed ctrl rly
• Fuel inj 1 control
• Fuel inj 2 control
• Fuel inj 4 control
• Fuel inj 5 control
• Fuel inj 6 control
• Fuse block (behind right side of dash, in right door opening)
• G125
• G129
• High speed fans control
• Hos1 low
• Hos2 low
• Hot at all times
• Hot in off, run bulb test, or start
• Hot in run, bulb test or start
• Iac coil b high
• Iat sensor ground
• Ic control
• Ign 0 fuse 10a
• Ignition control
• Ignition control module (icm) (top front of eng)
• Ignition wake up power
• Knock sensor signal 1
• Knock sensor signal 2
• Low speed fans control
• Maf sensor signal
• Map sensor
• Map sensor signal
• Pcm ground
• Pnk
• Pnk p
• Power (battery)
• Powertrain control module (pcm) (left front side of eng compt, in air cleaner assembly)
• Ref low
• S106
• S144
• S145
• S270
• Sensor grd
• Sensor ground
• Serial data (class 2)
• Spark plugs
• Splice pack sp250
• Tan
• Tcc brake switch input
• Torque requested
• Tp sensor signal
• Tr switch input b
• Trans fluid press sw a
• Underhood accessory wiring junction box (mounted to right strut tower)
• Vss high
• Vss low
• Vss output

3.8L VIN 1, Engine Performance Wiring Diagrams (2 of 4) for Buick Regal GSE 1999

List of elements for 3.8L VIN 1, Engine Performance Wiring Diagrams (2 of 4) for Buick Regal GSE 1999:

• (on transaxle stud)
• Electronic brake control/ electronic brake traction traction control (ebcm/ebtcm) (below left side of dash, left of steering column)
• Evaporative emissions (evap) canister purge solenoid valve (top right side of eng, near center of valve cover)
• Evaporative emissions (evap) canister vent solenoid valve (behind left side of rear fascia splash shield, in wheelwell)
• Fuel injectors
• G129
• Pnk
• S105
• S106
• S109
• Stop- light switch (on brake pedal support c2 bracket)
• Tan
• Transaxle range switch (on top right rear of transaxle)
• Underhood accessory wiring junction box (mounted to right strut tower)
• Vehicle speed sensor (vss) (lower right side of eng compt, on transaxle)

3.8L VIN 1, Engine Performance Wiring Diagrams (3 of 4) for Buick Regal GSE 1999

List of elements for 3.8L VIN 1, Engine Performance Wiring Diagrams (3 of 4) for Buick Regal GSE 1999:

• (body harn, under rear seat)
• (eng harn, near 4 cm from pcm breakout)
• (in exhaust system, rear of catalytic converter) heated oxygen sensor 2 (ho2s 2)
• (in right side exhaust manifold) heated oxygen sensor 1 (ho2s 1)
• (on bottom of engine oil pan) engine oil level indicator switch
• (on throttle body assembly) idle air control (iac) valve
• (on transaxle stud)
• (top rear of eng, part of throttle body assembly) mass airflow (maf) sensor
• A tan
• A/c refrigerant pressure sensor (on left side of eng compt, on accumulator)
• B12
• D pnk
• Engine coolant temperature (ect) sensor (top left side of eng, below throttle body)
• Engine oil pressure indicator switch (lower right side of eng, above transaxle)
• Exhaust gas recirculation (egr) valve (top rear of eng, near throttle body)
• Fuel tank pressure sensor (in fuel tank)
• G129
• Hot in run, bulb test or start
• Instrument cluster
• Intake air temperature (iat) sensor (left front of eng compt, in air cleaner duct)
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (top right of eng, on front of intake manifold)
• Nca
• Oxy sen fuse 15a
• Pnk
• S105
• S167
• S409
• Tan
• Throttle position (tp) sensor (on throttle body assembly)
• Trans fuse 10a
• Underhood accessory wiring junction box (mounted to right strut tower)

3.8L VIN 1, Engine Performance Wiring Diagrams (4 of 4) for Buick Regal GSE 1999

List of elements for 3.8L VIN 1, Engine Performance Wiring Diagrams (4 of 4) for Buick Regal GSE 1999:

• (fuel pump prime terminal)
• (on transaxle stud)
• (pin 12-15 not used)
• (pin 36-38 not used)
• (pin 40-41 not used)
• (pin 47-48 not used)
• (pin 51-54 not used)
• (pin 6 & 8 not used)
• (pin 62 & 64-65 not used)
• (pin 70-75 not used)
• (right rear shelf)
• 1-2 shift solenoid
• 2-3 shift solenoid
• 5v ref a
• A/c compress clutch rly
• A/c refrig press signal
• A/c request signal
• A/t iss solenoid
• A11
• Air conditioning system
• Auto transaxle fluid temperature sensor
• Automatic transaxle fluid pressure manual valve position switch
• Boost control sol
• Cluster fuse 10a
• Crank
• Crank signal fuse 10a
• Cruise control system
• Cruise engaged input
• D10
• Ect sensor signal
• Egr pintle position signal
• Egr val ign positive volt
• Eng emis fuse 10a
• Eng oil level ind in
• Eng oil press sensor sig
• Evap can vent sol
• F/pmp fuse 15a
• F/pmp spd cont relay
• Fuel inj 3 control
• Fuel level sensor
• Fuel level sensor input
• Fuel pump
• Fuel pump relay
• Fuel pump relay control
• Fuel pump resistor (outside of right front frame rail)
• Fuel tank
• Fuel tank press signal
• Fuse block (behind right side of dash, in right door opening)
• G129
• G313
• Gen terminal f output
• Gen terminal l output
• Ho2s 1 signal
• Ho2s 2 signal
• Hot at all times
• Hot in run, bulb test, or start
• Hot in start
• Iac coil a high
• Iac coil a low
• Iac coil b low
• Iat sensor signal
• Ignition positive volt (2)
• Map sensor signal
• Mil control
• Pc sol valve high
• Pc sol valve low
• Pcm- bcm fuse 10a
• Pnk
• Powertrain control module (pcm) (left front side of eng compt, in air cleaner assembly)
• Ps solenoid
• Red
• S106
• S234
• Sensor ground
• Starter enable control
• Starting/ charging system
• Supercharger bypass valve (top left of eng, above left valve cover)
• Tan
• Tan b
• Tcc release switch input
• Tcc sol valve control
• Tcc solenoid
• Tft sensor signal
• Torque delivered
• Tp sens or signal
• Tr switch input a
• Tr switch input c
• Tr switch input d
• Trans fluid press sw b
• Transaxle
• Underhood accessory wiring junction box (mounted to right strut tower)

3.8L VIN K, Engine Performance Wiring Diagrams (1 of 4) for Buick Regal GSE 1999

List of elements for 3.8L VIN K, Engine Performance Wiring Diagrams (1 of 4) for Buick Regal GSE 1999:

• (ign harn, top of eng, near ign control module)
• (not used)
• (on trans- axle stud)
• (pin 11 not used)
• (pin 14-15 not used)
• (pin 21 & 23-27 not used)
• (pin 40-42 not used)
• (pin 49-52 not used)
• (pin 66-67 not used)
• (top front of engine)
• 1-2 ss valve control
• 18x ref signal
• 2-3 ss valve control
• 3x ref signal
• A/t iss sensor high
• A/t iss sensor low
• Bank 1 knock sensor (left side of eng, in front of starter)
• Bank 2 knock sensor (right side of eng, below exhaust manifold)
• Camshaft position sensor (cmp) (front of eng, above crankshaft pulley)
• Cmp signal
• Cooling fans system
• Crankshaft position sensor (ckp) (front of eng, behind harmonic balancer)
• Cruise control system
• Cruise disable output
• Data link connector (dlc) (under left side of dash, right of steering column)
• Ecm fuse 10a
• Ect sensor signal
• Egr val control (gnd)
• Elek ign fuse 15a
• Eng emis fuse 10a
• Evap purge val control
• F/injr fuse 15a
• Fuel inj 1 control
• Fuel inj 2 control
• Fuel inj 4 control
• Fuel inj 5 control
• Fuel inj 6 control
• Fuse block (behind right side of dash, in right door opening)
• G125
• G129
• High speed fans control
• Hos1 low
• Hos2 low
• Hot at all times
• Hot in off, run bulb test, or start
• Hot in run, bulb test or start
• Iac coil b high
• Iat sensor ground
• Ic control
• Ign 0 fuse 10a
• Ignition control
• Ignition control module (icm) (top front of eng)
• Ignition wake up power
• Knock sensor signal 1
• Knock sensor signal 2
• Low speed fans control
• Maf sensor signal
• Map sensor
• Map sensor signal
• Pcm ground
• Pnk
• Pnk p
• Power (battery)
• Powertrain control module (pcm) (left front side of eng compt, in air cleaner assembly)
• Ref low
• S106
• S144
• S145
• S270
• Sensor grd
• Sensor ground
• Serial data (class 2)
• Spark plugs
• Splice pack sp250
• Tan
• Tcc brake switch input
• Tp sensor signal
• Tr switch input b
• Trans fluid press sw a
• Underhood accessory wiring junction box (mounted to right strut tower)
• Vss high
• Vss low
• Vss output

3.8L VIN K, Engine Performance Wiring Diagrams (2 of 4) for Buick Regal GSE 1999

List of elements for 3.8L VIN K, Engine Performance Wiring Diagrams (2 of 4) for Buick Regal GSE 1999:

• (on transaxle stud)
• Evaporative emissions (evap) canister purge solenoid valve (top left side of eng, near center of valve cover)
• Evaporative emissions (evap) canister vent solenoid valve (behind left side of rear fascia splash shield, in wheelwell)
• Fuel injectors
• G129
• Pnk
• S105
• S106
• S109
• Stop- light switch (on brake pedal support c2 bracket)
• Tan
• Transaxle range switch (on top right rear of transaxle)
• Underhood accessory wiring junction box (mounted to right strut tower)
• Vehicle speed sensor (vss) (lower right side of eng compt, on transaxle)

3.8L VIN K, Engine Performance Wiring Diagrams (3 of 4) for Buick Regal GSE 1999

List of elements for 3.8L VIN K, Engine Performance Wiring Diagrams (3 of 4) for Buick Regal GSE 1999:

• (body harn, under rear seat)
• (eng harn, near 4 cm from pcm breakout)
• (in exhaust system, rear of catalytic converter) heated oxygen sensor 2 (ho2s 2)
• (in right side exhaust manifold) heated oxygen sensor 1 (ho2s 1)
• (on bottom of engine oil pan) engine oil level indicator switch
• (on throttle body assembly) idle air control (iac) valve
• (on transaxle stud)
• (top rear of eng, part of throttle body assembly) mass airflow (maf) sensor
• A tan
• A/c refrigerant pressure sensor (on left side of eng compt, on accumulator)
• B12
• D pnk
• Engine coolant temperature (ect) sensor (top left side of eng, below throttle body)
• Engine oil pressure indicator switch (lower right side of eng, above transaxle)
• Exhaust gas recirculation (egr) valve (top rear of eng, near throttle body)
• Fuel tank pressure sensor (in fuel tank)
• G129
• Hot in run, bulb test or start
• Instrument cluster
• Intake air temperature (iat) sensor (left front of eng compt, in air cleaner duct)
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (top of engine, on front of intake manifold)
• Nca
• Oxy sen fuse 15a
• Pnk
• S105
• S167
• S409
• Tan
• Throttle position (tp) sensor (on throttle body assembly)
• Trans fuse 10a
• Underhood accessory wiring junction box (mounted to right strut tower)

3.8L VIN K, Engine Performance Wiring Diagrams (4 of 4) for Buick Regal GSE 1999

List of elements for 3.8L VIN K, Engine Performance Wiring Diagrams (4 of 4) for Buick Regal GSE 1999:

• (fuel pump prime terminal)
• (on transaxle stud)
• (pin 12-15 not used)
• (pin 36-38 not used)
• (pin 40-41 not used)
• (pin 47-48 not used)
• (pin 51-54 not used)
• (pin 6 & 8 not used)
• (pin 62 & 64-65 not used)
• (pin 70-75 not used)
• (right rear shelf)
• 1-2 shift solenoid
• 2-3 shift solenoid
• 5v ref a
• A/c compress clutch rly
• A/c refrig press signal
• A/c request signal
• A/t iss solenoid
• A11
• Air conditioning system
• Auto transaxle fluid temperature sensor
• Automatic transaxle fluid pressure manual valve position switch
• Cluster fuse 10a
• Crank
• Crank signal fuse 10a
• Cruise control system
• Cruise engaged input
• D10
• Ect sensor signal
• Egr pintle position signal
• Egr val ign positive volt
• Eng oil level ind in
• Eng oil press sensor sig
• Evap can vent sol
• F/pmp fuse 15a
• F/pump relay
• Fuel inj 3 control
• Fuel level sensor
• Fuel level sensor input
• Fuel pump
• Fuel pump relay control
• Fuel tank
• Fuel tank press signal
• Fuse block (behind right side of dash, in right door opening)
• G129
• G313
• Gen terminal f output
• Gen terminal l output
• Ho2s 1 signal
• Ho2s 2 signal
• Hot at all times
• Hot in run, bulb test, or start
• Hot in start
• Iac coil a high
• Iac coil a low
• Iac coil b low
• Iat sensor signal
• Ignition positive volt (2)
• Map sensor signal
• Mil control
• Pc sol valve high
• Pc sol valve low
• Pcm- bcm fuse 10a
• Pnk
• Powertrain control module (pcm) (left front side of eng compt, in air cleaner assembly)
• Ps solenoid
• Red
• S106
• S234
• Sensor ground
• Starter enable control
• Starting/ charging system
• Tan
• Tan b
• Tcc release switch input
• Tcc sol valve control
• Tcc solenoid
• Tft sensor signal
• Tp sens or signal
• Tr switch input a
• Tr switch input c
• Tr switch input d
• Trans fluid press sw b
• Transaxle
• Underhood accessory wiring junction box (mounted to right strut tower)