ENGINE PERFORMANCE – Pontiac Grand Prix SE 1998 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.1L

3.1L (VIN M), Engine Performance Wiring Diagrams (1 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.1L (VIN M), Engine Performance Wiring Diagrams (1 of 4) for Pontiac Grand Prix SE 1998:

• (eng harn, on right side of eng compt, 15 cm from pcm breakout)
• (lower left front of eng)
• (pin 10-12 not used)
• (pin 21-27 not used)
• (pin 39-42 not used)
• (pin 49-52 not used)
• (pin 62-63 not used)
• 1-2 ss valve control
• 2-3 ss valve control
• 3x ref high
• 3x ref low (ground)
• A12
• Anti-theft system
• Bypass control
• C10
• Camshaft position sensor (front of eng, below intake plenum)
• Canister vent fuse 10a
• Charge ind control
• Ckp sensor signal
• Cmp signal
• Cooling fan system
• Crankshaft position sensor (24x) (front of eng, behind harmonic balancer)
• Crankshaft position sensor (7x) (lower right side of of eng, below exhaust manifold)
• Cruise control system
• Cruise disable output
• D11
• Data link connector (under left side of dash, right of steering column)
• Dfi fuse 15a
• Ecm fuse 10a
• Ecm sense fuse 10a
• Egr val control (gnd)
• Evap purge val drviver
• Fuel inj #1 driver
• Fuel inj #2 driver
• Fuel inj #3 driver
• Fuel inj #5 driver
• Fuel inj #6 driver
• Fuel level level ctrl
• Fuse block (behind right side of dash, in right door opening)
• G110
• G11o
• High speed fans control
• Hos1 low
• Hos2 low
• Hot at all times
• Hot coolant ind control
• Hot in off, run bulb test, or start
• Hot in run, bulb test or start
• Iac coil b high
• Iat sensor ground
• Ic control
• Ign1-uh fuse 15a
• Ignition control module (top right side of eng)
• Ignition wake up power
• Inj fuse 10a
• Instrument cluster system
• Knock sensor (left side of eng, above starter)
• Knock sensor signal
• Low speed fans control
• Maf sensor signal
• Map/ect sensor signal
• Nca
• Pcm ground
• Pnk
• Pnk b
• Power (battery)
• Powertrain control module (left front side of eng compt, in air cleaner assembly)
• Red
• S106
• S131
• S146
• S155
• Sensor ground
• Serial data (class 2)
• Serial data (uart)
• Spark plugs
• Starting/ charging system
• Tan
• Tcc brake switch input
• Theft deter fuel enable
• Tp sensor signal
• Tr switch input b
• Underhood accessory wiring junction block (mounted to right strut tower)
• Vss high
• Vss low
• Vss output

3.1L (VIN M), Engine Performance Wiring Diagrams (2 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.1L (VIN M), Engine Performance Wiring Diagrams (2 of 4) for Pontiac Grand Prix SE 1998:

• (lower left front of eng)
• (mounted to right strut tower) underhood accessory wiring junction block)
• A12
• Evaporative emissions canister purge solenoid valve (top right side of eng, behind ignition control module)
• Evaporative emissions canister vent solenoid valve (behind left side of rear fascia splash shield, behind wheelwell)
• F12
• Fuel injectors
• G110
• Instrument cluster system
• Pnk
• Red
• S105
• S109
• Stop lamp switch (on brake pedal support c2 bracket)
• Tan
• Transaxle range switch (left side of eng compt, on transaxle)
• Underhood electrical center (mounted to right strut tower)
• Vehicle speed sensor (lower right side of eng compt, on transaxle)

3.1L (VIN M), Engine Performance Wiring Diagrams (3 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.1L (VIN M), Engine Performance Wiring Diagrams (3 of 4) for Pontiac Grand Prix SE 1998:

• (eng harn, above ignition control module, 2 cm from ignition control module c2 breakout)
• (eng harn, below intake plenum, 2 cm from pcm breakout)
• (eng harn, left front side of eng compt, 7 cm from ebtcm breakout)
• (eng harn, on right side of eng compt, 15 cm from pcm breakout)
• (lower left center of eng, in oil pan) engine oil level indicator switch
• (on throttle body assembly) idle air control (iac) valve
• (top rear of eng, in air cleaner duct) mass air flow sensor
• A/c refrigerant pressure sensor (on left side of eng compt, on accumulator)
• Engine coolant temperature (ect) sensor (top left side of eng, below throttle body)
• Exhaust gas recirculation valve (top rear of eng, near throttle body)
• Fuel tank pressure sensor (in fuel tank)
• G110 (lower left front of eng)
• Instrument cluster
• Intake air temperature (iat) sensor (left front of eng compt, in air cleaner duct)
• Malfunction indicator lamp
• Manifold absolute pressure sensor (top right side of eng, above valve cover)
• Pnk
• Red
• S106
• S107
• S121
• S122
• S167
• S409
• Tan
• Throttle position sensor (on throttle body assembly)
• Underhood electrical center (mounted to right strut tower)

3.1L (VIN M), Engine Performance Wiring Diagrams (4 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.1L (VIN M), Engine Performance Wiring Diagrams (4 of 4) for Pontiac Grand Prix SE 1998:

• (lower left front of eng)
• (pin 12-15 not used)
• (pin 19-21 not used)
• (pin 29-32 not used)
• (pin 45-48 not used)
• (pin 51-54 not used)
• (pin 62-65 not used)
• (pin 74-77 not used)
• (right door sill, forward of right front seat)
• 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
• Air conditioning system
• Auto transaxle fluid temperature sensor
• B10
• Bat fuel pump fuse 15a
• Change oil soon ind
• Cmp/ckp sensor batt (+)
• Cmp/ckp sensor ground
• Cruise control system
• Cruise engaged input
• D10
• Ect sensor signal
• Egr pintle position signal
• Egr val ign positive volt
• Eng oil level ind in
• Evap can vent sol driver
• F/pump relay
• Fuel inj #4 driver
• 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)
• G110
• G110 (lower left front of eng)
• G316
• Gen terminal l output
• Heated oxygen sensor (ho2s) no1 (in right bank exhaust manifold)
• Heated oxygen sensor (ho2s) no2 (in exhaust system, rear of catalytic converter)
• Ho2s 1 signal
• Ho2s 2 signal
• Hot at all times
• Hot in run, bulb test or start
• Hot in run, bulb test, or start
• I/p ign fuse 10a
• Iac coil a high
• Iac coil a low
• Iac coil b low
• Iat sensor signal
• Ign1-uh fuse 15a
• Instrument cluster system
• Low oil level ind control
• Map sensor signal
• Mil control
• Nca
• Pnk
• Pnk e
• Powertrain control module (left front side of eng compt, in air cleaner assembly)
• Red
• S105
• S106
• S209
• Sensor ground
• Starting/ charging system
• Tach control
• Tan
• Tcc fuse 10a
• Tcc pwm sol val control
• Tcc pwm solenoid
• Tcc solenoid
• Tcc valve control
• Tft sensor signal
• Tp sens or signal
• Tr switch input a
• Tr switch input c
• Tr switch input d
• Transaxle
• Underhood accessory wiring junction block (mounted to right strut tower)

3.8L

3.8L (VIN 1), Engine Performance Wiring Diagrams (1 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.8L (VIN 1), Engine Performance Wiring Diagrams (1 of 4) for Pontiac Grand Prix SE 1998:

• (eng harn, left side of eng compt, near breakout to ebtcm)
• (ign harn, top of eng, near ign control module)
• (lower left front of eng)
• (not used)
• (pin 10-11 not used)
• (pin 21 & 23-27 not used)
• (pin 40-42 not used)
• (pin 49-52 not used)
• (pin 66-67 not used)
• (right side of eng)
• 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
• A12
• B12
• C10
• C12
• Camshaft position sensor (front of eng, above crankshaft pulley)
• Canister vent fuse 10a
• Charge indicator ctrl
• Cmp signal
• Cooling fans system
• Crankshaft position sensor (front of eng, behind harmonic balancer)
• Cruise control system
• Cruise disable output
• D11
• Data link connector (under left side of dash, right of steering column)
• Dfi fuse 15a
• Ecm fuse 10a
• Ecm sense fuse 10a
• Ect sensor signal
• Egr val control (gnd)
• Evap purge val drviver
• F/pump speed ctrl rly
• Fuel inj #2 driver
• Fuel inj 1 driver
• Fuel inj 4 driver
• Fuel inj 5 driver
• Fuel inj 6 driver
• Fuse block (behind right side of dash, in right door opening)
• G110
• G120
• High speed fans control
• Hos1 low
• Hos2 low
• Hot at all times
• Hot coolant ind ctrl
• Hot in run bulb test, or start
• Hot in run, bulb test or start
• Iac coil b high
• Iat sensor ground
• Ic control
• Ignition control
• Ignition control module (top left front of eng)
• Ignition wake up power
• Inj fuse 10a
• Instrument cluster system
• Istrument cluster system
• Knock sensor bank 1 (left side of eng, above starter)
• Knock sensor bank 2 (right side of eng, below exhaust manifold)
• Knock sensor signal #1
• Knock sensor signal #2
• Low speed fans control
• Maf sensor signal
• Map sensor signal
• Pcm ground
• Pnk
• Pnk p
• Power (battery)
• Powertrain control module (left front side of eng compt, in air cleaner assembly)
• Red
• Ref low
• S106
• S131
• S144
• S145
• Sensor ground
• Serial data (class ii)
• Serial data (uart)
• Spark plugs
• Starting/charging system
• Tach ctrl
• Tan
• Tcc brake switch input
• Torque requested
• Tp sensor signal
• Tr switch input b
• Trans fluid press sw a
• Underhood accessory wiring junction block (mounted to right strut tower)
• Vss high
• Vss low
• Vss output

3.8L (VIN 1), Engine Performance Wiring Diagrams (2 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.8L (VIN 1), Engine Performance Wiring Diagrams (2 of 4) for Pontiac Grand Prix SE 1998:

• (i/p harn, left rear of eng compt, near breakout to windshield wiper motor)
• (lower left front of eng)
• (mounted to right strut tower) underhood accessory wiring junction block)
• A12
• Electronic brake traction control module (left side of eng compt, part of brake pressure, modulator valve)
• Evaporative emissions canister purge solenoid valve (top right side of eng, near center of valve cover)
• Evaporative emissions canister vent solenoid valve (behind left side of rear fascia splash shield, in wheelwell)
• F12
• Fuel injectors
• G110
• G202 (right side of dash)
• Instrument cluster system
• Nca
• Performance shift switch
• Pnk
• Red
• S105
• S106
• S125
• S211
• Stop lamp switch (on brake pedal
• Support c2 bracket)
• Tan
• Transaxle range switch (left side of eng compt, on transaxle)
• Underhood electrical center (mounted to right strut tower)
• Vehicle speed sensor (lower right side of eng compt, on transaxle)

3.8L (VIN 1), Engine Performance Wiring Diagrams (3 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.8L (VIN 1), Engine Performance Wiring Diagrams (3 of 4) for Pontiac Grand Prix SE 1998:

• (body harn, below rear window panel)
• (eng harn, front left side of eng compt, near breakout ebtcm)
• (eng harn, left top front of eng)
• (in exhaust system, rear of catalytic converter) heated oxygen sensor (ho2s) no2
• (in right bank exhaust manifold) heated oxygen sensor (ho2s) no1
• (lower left center of eng, in oil pan) engine oil level indicator switch
• (lower left front of eng)
• (rear of eng, on supercharger) idle air control (iac) valve
• (top rear of eng, part of throttle body assembly) mass air flow sensor
• A tan
• A/c refrigerant pressure sensor (on left side of eng compt, on accumulator)
• C pnk
• D pnk
• Engine coolant temperature (ect) sensor (top left side of eng, below throttle body)
• Engine oil pressure indicator switch (lower right front of eng, above transaxle)
• Exhaust gas recirculation valve (top rear of eng, near throttle body)
• Fuel tank pressure sensor (in fuel tank)
• G110
• Hot in run, bulb test or start
• Ign1-uh fuse 15a
• Instrument cluster
• Intake air temperature (iat) sensor (left front of eng compt, in air cleaner duct)
• Malfunction indicator lamp
• Manifold absolute pressure sensor (top right rear of eng, above valve cover)
• Nca
• Pnk
• Red
• S105
• S107
• S122
• S167
• S409
• Tan
• Tcc fuse 10a
• Throttle position sensor (on throttle body assembly)
• Underhood electrical center (mounted to right strut tower)

3.8L (VIN 1), Engine Performance Wiring Diagrams (4 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.8L (VIN 1), Engine Performance Wiring Diagrams (4 of 4) for Pontiac Grand Prix SE 1998:

• (fuel pump prime terminal)
• (lower left front of eng)
• (pin 12-15 not used)
• (pin 29-32 not used)
• (pin 40-41 not used)
• (pin 47-48 not used)
• (pin 51-54 not used)
• (pin 62 & 64-65 not used)
• (pin 71-76 not used)
• (right door sill, forward of right front seat)
• (torque delivered
• 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
• Air conditioning system
• Anti-theft system
• Auto transaxle fluid temperature sensor
• Automatic transaxle fluid pressure manual valve position switch
• B10
• Boost control sol driver
• Change oil soon ind ctrl
• 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 driver
• F/pmp spd cont relay
• Fuel inj 3 driver
• Fuel level sensor
• Fuel level sensor input
• Fuel pump
• Fuel pump fuse 15a
• 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)
• G110
• G316
• Gen terminal l output
• Ho2s 1 signal
• Ho2s 2 signal
• Hot at all times
• Hot in run, bulb test, or start
• I/p ign fuse 10a
• Iac coil a high
• Iac coil a low
• Iac coil b low
• Iat sensor signal
• Ign1-uh fuse 15a
• Instrument cluster system
• Low oil level ind ctrl
• Map sensor signal
• Mil control
• Pc sol valve high
• Pc sol valve low
• Performance shift switch
• Pnk
• Powertrain control module (left front side of eng compt, in air cleaner assembly)
• Ps solenoid
• Red
• S106
• S209
• S406
• Sensor ground
• Starting/ charging system
• Supercharger bypass valve (top rear of eng, above left valve cover)
• Tach control
• Tan
• Tcc release switch input
• Tcc sol valve control
• Tcc solenoid
• Tft sensor signal
• Theft deter fuel enable
• 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 block (mounted to right strut tower)

3.8L (VIN K), Engine Performance Wiring Diagrams (1 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (1 of 4) for Pontiac Grand Prix SE 1998:

• (eng harn, left side of eng compt, 4 cm from ebtcm breakout)
• (ign ctrl harn, top of eng, near ignition control module)
• (lower left front of eng)
• (not used)
• (pin 10-11 not used)
• (pin 21 & 23-27 not used)
• (pin 40-42 not used)
• (pin 49-52 not used)
• (pin 66-67 not used)
• (right side of eng)
• 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
• A12
• B12
• C10
• C12
• Camshaft position sensor (front of eng, above crankshaft pulley)
• Canister vent fuse 10a
• Charge indicator ctrl
• Cmp signal
• Cooling fans system
• Crankshaft position sensor (front of eng, behind harmonic balancer)
• Cruise control system
• Cruise disable output
• D11
• Data link connector (under left side of dash, right of steering column)
• Dfi fuse 15a
• Ecm fuse 10a
• Ecm sense fuse 10a
• Ect sensor signal
• Egr val control (gnd)
• Evap purge val drviver
• Fuel inj 1 driver
• Fuel inj 2 driver
• Fuel inj 4 driver
• Fuel inj 5 driver
• Fuel inj 6 driver
• Fuse block (behind right side of dash, in right door opening)
• G110
• G120
• High speed fans control
• Hos1 low
• Hos2 low
• Hot at all times
• Hot coolant ind ctrl
• Hot in run bulb test, or start
• Hot in run, bulb test or start
• Iac coil b high
• Iat sensor ground
• Ic control
• Ignition control
• Ignition control module (top left front of eng)
• Ignition wake up power
• Inj fuse 10a
• Instrument cluster system
• Knock sensor bank 1 (left side of eng, above starter)
• Knock sensor bank 2 (right side of eng, below exhaust manifold)
• Knock sensor signal #1
• Knock sensor signal #2
• Low speed fans control
• Maf sensor signal
• Map sensor signal
• Pcm ground
• Pnk
• Pnk p
• Power (battery)
• Powertrain control module (left front side of eng compt, in air cleaner assembly)
• Red
• Ref low
• S106
• S131
• S144
• S145
• Sensor ground
• Serial data (class ii)
• Serial data (uart)
• Spark plugs
• Starting/charging system
• Tach ctrl
• Tan
• Tcc brake switch input
• Tp sensor signal
• Tr switch input b
• Trans fluid press sw a
• Underhood accessory wiring junction block (mounted to right strut tower)
• Vss high
• Vss low
• Vss output

3.8L (VIN K), Engine Performance Wiring Diagrams (2 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (2 of 4) for Pontiac Grand Prix SE 1998:

• (lower left front of eng)
• (mounted to right strut tower) underhood accessory wiring junction block)
• A12
• Evaporative emissions canister purge solenoid valve (top right side of eng, near center of valve cover)
• Evaporative emissions canister vent solenoid valve (behind left side of rear fascia splash shield, in wheelwell)
• F12
• Fuel injectors
• G110
• Instrument cluster system
• Pnk
• Red
• S105
• S106
• Stop lamp switch (on brake pedal support c2 bracket)
• Tan
• Transaxle range switch (left side of eng compt, on transaxle)
• Underhood accessory wiring junction block (mounted to right strut tower)
• Vehicle speed sensor (lower right side of eng compt, on transaxle)

3.8L (VIN K), Engine Performance Wiring Diagrams (3 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (3 of 4) for Pontiac Grand Prix SE 1998:

• (body harn, below rear window panel)
• (eng harn, front left side of eng compt, 7 cm from ebtcm breakout)
• (eng harn, left top front of eng)
• (eng harn, top left front of eng)
• (in exhaust system, rear of catalytic converter) heated oxygen sensor (ho2s) no2
• (in right bank exhaust manifold) heated oxygen sensor (ho2s) no1
• (lower left center of eng, in oil pan) engine oil level indicator switch
• (lower left front of eng)
• (rear of eng, on supercharger) idle air control (iac) valve
• (top rear of eng, part of throttle body assembly) mass air flow sensor
• A tan
• A/c refrigerant pressure sensor (on left side of eng compt, on accumulator)
• C pnk
• D pnk
• Engine coolant temperature (ect) sensor (top left side of eng, below throttle body)
• Engine oil pressure indicator switch (lower right front of eng, above transaxle)
• Exhaust gas recirculation valve (top rear of eng, near throttle body)
• Fuel tank pressure sensor (in fuel tank)
• G110
• Hot in run, bulb test or start
• Ign1-uh fuse 15a
• Instrument cluster
• Intake air temperature (iat) sensor (left front of eng compt, in air cleaner duct)
• Malfunction indicator lamp
• Manifold absolute pressure sensor (top of eng, on front of intake manifold)
• Nca
• Pnk
• Red
• S105
• S107
• S122
• S167
• S409
• Tan
• Tcc fuse 10a
• Throttle position sensor (on throttle body assembly)
• Underhood accessory wiring junction block (mounted to right strut tower)

3.8L (VIN K), Engine Performance Wiring Diagrams (4 of 4) for Pontiac Grand Prix SE 1998

List of elements for 3.8L (VIN K), Engine Performance Wiring Diagrams (4 of 4) for Pontiac Grand Prix SE 1998:

• (fuel pump prime terminal)
• (lower left front of eng)
• (pin 12-15 not used)
• (pin 29-32 not used)
• (pin 40-41 not used)
• (pin 47-48 not used)
• (pin 51-54 not used)
• (pin 62 & 64-65 not used)
• (pin 71-78 not used)
• (right door sill, forward of right front seat)
• 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
• Air conditioning system
• Anti-theft system
• Auto transaxle fluid temperature sensor
• Automatic transaxle fluid pressure manual valve position switch
• B10
• Change oil soon ind ctrl
• 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 driver
• Fuel inj #3 driver
• Fuel level sensor
• Fuel level sensor input
• Fuel pump
• Fuel pump fuse 15a
• Fuel pump relay
• Fuel pump relay control
• Fuel tank
• Fuel tank press signal
• Fuse block (behind right side of dash, in right door opening)
• G110
• G316
• Gen terminal l output
• Ho2s 1 signal
• Ho2s 2 signal
• Hot at all times
• Hot in run, bulb test, or start
• I/p ign fuse 10a
• Iac coil a high
• Iac coil a low
• Iac coil b low
• Iat sensor signal
• Instrument cluster system
• Low oil level ind ctrl
• Map sensor signal
• Mil control
• Pc sol valve high
• Pc sol valve low
• Pnk
• Powertrain control module (left front side of eng compt, in air cleaner assembly)
• Ps solenoid
• Red
• S106
• S209
• S406
• Sensor ground
• Starting/ charging system
• Tach control
• Tan
• Tcc release switch input
• Tcc sol valve control
• Tcc solenoid
• Tft sensor signal
• Theft deter fuel enable
• 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 block (mounted to right strut tower)