ENGINE PERFORMANCE – Chevrolet Monte Carlo LS 1999 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.1L

3.1L VIN M, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Monte Carlo LS 1999

List of elements for 3.1L VIN M, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Monte Carlo LS 1999:

• (eng harn)
• (eng harn, on right side of eng compt, 24 cm from pcm breakout)
• (inst panel harn, 5 cm from blower motor breakout)
• (on transaxle stud)
• (on transaxle stud)
• (pin 10-12 not used)
• (pin 21-27 not used)
• (pin 39-42 not used)
• (pin 49-52 not used)
• (pin 61-63 not used)
• 1-2 ss valve control
• 2-3 ss valve control
• 3x ref high
• 3x ref low
• Anti-theft system
• Battery pos voltage
• Bypass control
• Camshaft position (cmp) sensor (front of eng, below intake plenum)
• Charge ind control
• Ckp (24x) sensor signal
• Cmp signal
• Cooling fan system
• Crankshaft position (ckp) sensor (24x) (at end of crankshaft behind harmonic balancer)
• Crankshaft position (ckp) sensor (7x) (lower right side of eng)
• Cruise control system
• Cruise disable output
• Data link connector (dlc) (below dash, right of steering column)
• Egr val control
• Eleck ign fuse 15a
• Engine wiring harness junction block 1 (forward of right front strut tower)
• Evap purge val control
• F/injn fuse 15a
• Fuel gauge ctrl
• Fuel inj 1 control
• Fuel inj 2 control
• Fuel inj 3 control
• Fuel inj 5 control
• Fuel inj 6 driver
• Fuse 10a
• Fuse 5a
• Fuse block (behind right side of dash)
• G129
• High speed fans control
• Ho2s 1 low
• Ho2s 2 low
• Hot at all times
• Hot coolant ind control
• Hot in run bulb test, or start
• Hot in run, bulb test or start
• Iac coil b high
• Ic control
• Ignition control module (top right side of eng)
• Ignition pos voltage
• Instrument cluster system
• Knock sensor (ks) bank 1 (lower left side of eng block, above starter)
• Knock sensor signal
• Low speed fans control
• Maf sensor signal
• Pcm bat fuse 20a
• Pcm ground
• Pcm ign fuse 15a
• Pnk
• Pnk b
• Powertrain control module (pcm) (on right side of eng compt, forward of strut tower)
• Red
• S102
• S106
• S142
• S146
• S155
• S156
• S237
• Sensor ground
• Serial data (class 2)
• Serial data (uart)
• Spark plugs
• Starting/ charging system
• Stoplamp switch
• Tan
• Theft deter fuel enable
• Transaxle range sw
• Vss high
• Vss low
• Vss output

3.1L VIN M, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Monte Carlo LS 1999

List of elements for 3.1L VIN M, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Monte Carlo LS 1999:

• (on transaxle stud)
• Evaporative emissions (evap) canister purge solenoid valve (on top right of eng, on intake plenum)
• Evaporative emissions (evap) canister vent solenoid valve (behind left side of rear fascia splash shield, in wheelwell)
• Fuel injectors
• G129
• Pnk
• S106
• S109
• Stoplamp switch (on brake pedal support)
• Tan
• Transaxle range switch (top of transaxle)
• Vehicle speed sensor (vss) (on right rear of eng compt, end of transaxle)

3.1L VIN M, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Monte Carlo LS 1999

List of elements for 3.1L VIN M, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Monte Carlo LS 1999:

• (eng harn, 2 cm from pcm breakout)
• (eng harn, above ignition control module, 2 cm from ignition control module c2 breakout)
• (eng harn, on right side of eng compt, 15 cm from pcm breakout)
• (eng jmp harn, below intake plenum, 2 cm from fuel inj 3 breakout)
• (fuel harn, below rear of vehicle)
• (in center of eng oil pan) engine oil level sensor
• (on air intake, on rear of eng) mass air flow (maf) sensor
• (on throttle body assembly) idle air control (iac) valve
• A/c refrigerant pressure sensor (on left front of eng compt, on a/c line)
• C10
• Engine coolant temperature (ect) sensor (near coolant outlet, left rear of eng)
• Exhaust gas recirculation (egr) valve (top rear of eng)
• Fuel tank pressure sensor (in fuel tank)
• Fuse 10a
• Fuse block (behind right side of dash)
• G129 (on transaxle stud)
• Hot in run, bulb test, or start
• Instrument cluster
• Intake air temperature (iat) sensor (in air cleaner canister)
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (on top of eng, on intake plenum)
• Pnk
• Red
• S106
• S107
• S121
• S122
• S167
• S209
• S425
• Tan
• Throttle position (tp) sensor (on throttle body assembly)

3.1L VIN M, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Monte Carlo LS 1999

List of elements for 3.1L VIN M, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Monte Carlo LS 1999:

• (at base of left "b" pillar)
• (on transaxle stud)
• (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)
• 1-2 shift solenoid
• 2-3 shift solenoid
• 5v ref a
• 5v ref b
• A auto transaxle fluid temperature sensor
• A/c compress clutch rly
• A/c refrig press signal
• A/c request signal
• Air conditioning system
• Change oil soon ind
• Cmp/ckp sensor batt (+)
• Cmp/ckp sensor ground
• Cruise control system
• Cruise engaged input
• E11
• Ect sensor signal
• Egr pintle position signal
• Egr val ign sys volt
• Eng oil level sw in
• Engine wiring harness junction block 1 (forward of right front strut tower)
• Evap can vent val cntrl
• F11
• Fuel inj 4 control
• Fuel level sensor
• Fuel level sensor input
• Fuel pump
• Fuel pump relay
• Fuel pump relay control
• Fuel tank
• Fuel tank press signal
• G129
• G129 (on transaxle stud)
• G308
• Gen terminal l output
• Heated oxygen sensor (ho2s) 1 (in exhaust manifold, right side of eng)
• Heated oxygen sensor (ho2s) 2 (in exhaust system, behind catalytic converter)
• Ho2s 1 signal
• Ho2s 2 signal
• Hot at all times
• Hot in run, bulb test or start
• Iac coil a high
• Iac coil a low
• Iac coil b low
• Iat sensor signal
• Instrument cluster system
• Low oil level ind control
• Map sensor signal
• Mil control
• Nca
• Pcm bat fuse 20a
• Pnk
• Pnk e
• Powertrain control module (pcm) (on right side of eng compt, forward of strut tower)
• Red
• S102
• S105
• S106
• S305
• Starting/ charging system
• Tan
• Tan a
• Tcc pwm sol control
• Tcc pwm solenoid
• Tcc sol control
• Tcc solenoid
• Tft sensor signal
• Tp sensor signal
• Tr switch input a
• Tr switch input c
• Tr switch input d
• Trans fuse 10a
• Transaxle

3.8L

3.8L VIN K, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Monte Carlo LS 1999

List of elements for 3.8L VIN K, Engine Performance Wiring Diagrams (1 of 4) for Chevrolet Monte Carlo LS 1999:

• (i/p harn, below i/p compt, 5 cm from blower motor relay breakout)
• (ign harn, top of eng, near ign control module)
• (left front of eng, below ignition control module)
• (on transaxle stud)
• (pin 10-14 not used)
• (pin 23-27 not used)
• (pin 39-42 not used)
• (pin 49-52 not used)
• (pin 66-67 not used)
• 1-2 ss valve control
• 18x ref
• 2-3 ss valve control
• 3x ref
• Anti-theft system
• At/iss sensor high
• At/iss sensor low
• Bank 1 ks sig
• Bank 2 ks sig
• Battery pos voltage
• Bypass control
• Camshaft position (cmp) sensor (on front of eng, above right side of crankshaft pulley)
• Charge ind control
• Cmp signal
• Cooling fans system
• Crankshaft position (ckp) sensor (at end of crankshaft, behind harmonic balancer)
• Cruise control system
• Cruise disable output
• Data link connector (dlc) (below dash, right of steering column)
• Egr control (gnd)
• Eleck ign fuse 15a
• Engine wiring harness junction block 1 (forward of right front strut tower)
• Evap purge control
• F/injn fuse 15a
• Fuel inj 1 control
• Fuel inj 2 control
• Fuel inj 4 control
• Fuel inj 5 control
• Fuel inj 6 control
• Fuel level output ctrl
• Fuse 10a
• Fuse 5a
• Fuse block (on right side of dash)
• G110
• G129
• High speed fans control
• Ho2s 1 low
• Ho2s 2 low
• Hot at all times
• Hot in run bulb test, or start
• Hot in run, bulb test or start
• Iac coil b high
• Ic control
• Ignition control module (top left front of eng)
• Ignition pos voltage
• Instrument cluster system
• Knock sensor (ks) bank 1 (lower left side of eng block, above starter)
• Knock sensor (ks) bank 2 (lower right side of eng block, below exhaust manifold)
• Low speed fans control
• Maf sensor signal
• Pcm bat fuse 20a
• Pcm ground
• Pcm ign fuse 15a
• Pnk
• Pnk p
• Powertrain control module (pcm) (on right side of eng compt, forward of strut tower)
• Ref low
• S102
• S106
• S142
• S144
• S145
• S156
• S237
• Sensor ground
• Serial data (class 2)
• Serial data (uart)
• Spark plugs
• Starting/ charging system
• Tan
• Tcc brake switch input
• Theft deter fuel enable
• Tr switch input b
• Trans fluid press sw a
• Vss high
• Vss low
• Vss output

3.8L VIN K, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Monte Carlo LS 1999

List of elements for 3.8L VIN K, Engine Performance Wiring Diagrams (2 of 4) for Chevrolet Monte Carlo LS 1999:

• (on transaxle stud)
• Evaporative emissions (evap) canister purge solenoid valve (on top right side near center of valve cover)
• Evaporative emissions (evap) canister vent solenoid valve (behind left rear fascia splash shield, in wheelwell)
• Fuel injectors
• G129
• Pnk
• S106
• S109
• Stoplamp switch (on brake pedal support)
• Tan
• Transaxle range switch (top of transaxle)
• Vehicle speed sensor (vss) (on right rear of eng compt, end of transaxle)

3.8L VIN K, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Monte Carlo LS 1999

List of elements for 3.8L VIN K, Engine Performance Wiring Diagrams (3 of 4) for Chevrolet Monte Carlo LS 1999:

• (eng harn, 7 cm from 2-pin conn of right cooling fan breakout)
• (eng harn, below left side of radiator, 15 cm from egr valve)
• (eng harn, left side of eng compt, 4 cm from pcm breakout)
• (eng harn, left side of eng, near throttle body, 4 cm from maf sensor
• (fuel harn, 43 cm from 6-pin conn above fuel tank)
• (in exhaust manifold, right side of eng compt) heated oxygen sensor (ho2s) 1
• (in exhaust system, behind catalytic converter) heated oxygen sensor (ho2s) 2
• (in left side of eng oil pan) engine oil level sensor
• (on air intake, on rear of eng) mass air flow (maf) sensor
• (on throttle body assembly) idle air control (iac) valve
• (on transaxle stud)
• A tan
• A/c refrigerant pressure sensor (on left front of eng compt, on a/c line)
• Breakout) s107
• D pnk
• Engine coolant temperature (ect) sensor (near coolant outlet, left rear of eng)
• Exhaust gas recirculation (egr) valve (top right rear of eng)
• Fuel tank pressure sensor (in fuel tank)
• G129
• G129 (on transaxle stud)
• Intake air temperature (iat) sensor (in air cleaner canister)
• Manifold absolute pressure (map) sensor (on top front of eng, on intake plenum)
• Nca
• Pnk
• Red
• S105
• S106
• S121
• S122
• S425
• Tan
• Throttle position (tp) sensor (on throttle body assembly)

3.8L VIN K, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Monte Carlo LS 1999

List of elements for 3.8L VIN K, Engine Performance Wiring Diagrams (4 of 4) for Chevrolet Monte Carlo LS 1999:

• (at base of left "b" pillar)
• (on transaxle stud)
• (pin 12-15 not used)
• (pin 19-21 not used)
• (pin 30-32 not used)
• (pin 47-48 not used)
• (pin 51-54 not used)
• (pin 62 not used)
• (pin 64-65 not used)
• (pin 70-77 not used)
• 1-2 shift solenoid
• 2-3 shift solenoid
• 5v ref a
• 5v ref b
• A auto transaxle fluid temperature sensor
• A/c compress clutch rly
• A/c refrig press signal
• A/c request signal
• A/t iss solenoid
• Air conditioning system
• Automatic transaxle fluid pressure manual valve position switch
• C10
• Change oil soon ind
• Cruise control system
• Cruise status
• E e e e e e e
• E11
• Ect sensor signal
• Egr pintle position signal
• Egr val cntrl
• Eng oil level ind in
• Engine wiring harness junction block 1 (forward of right front strut tower)
• Evap can vent sol driver
• F11
• Fuel inj 3 control
• Fuel level sensor
• Fuel level sensor input
• Fuel pump
• Fuel pump relay
• Fuel pump relay control
• Fuel tank
• Fuel tank press signal
• Fuse 10a
• Fuse block (on right side of dash)
• G129
• G308
• Gen terminal f monitor
• Gen terminal l output
• Ho2s 1 signal high
• Ho2s 2 signal high
• Hot at all times
• Hot in run, bulb test or start
• Hot in run, bulb test, or start
• Iac coil a high
• Iac coil a low
• Iac coil b low
• Iat sensor signal
• Instrument cluster
• Instrument cluster system
• L l l l l l l
• Low oil level ind control
• M m m m m m m
• Malfunction indicator lamp
• Map sensor signal
• Mil control
• Pc solenoid valve high
• Pc solenoid valve low
• Pcm bat fuse 20a
• Pnk
• Pnk pnk pnk pnk pnk pnk pnk
• Powertrain control module (pcm) (on right side of eng compt, forward of strut tower)
• Ps solenoid
• Red
• S102
• S106
• S209
• S305
• Starting/ charging system
• Tan
• Tan b
• Tcc pwm sol val control
• Tcc release switch input
• Tcc solenoid
• Tft sensor signal
• Tp sens or signal
• Tr switch input c
• Tr switch input d
• Tr switch input p
• Trans fluid press sw b
• Trans fluid press sw c
• Trans fuse 10a
• Transaxle