ENGINE PERFORMANCE – Buick Century Limited 1997 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.1L

3.1L (VIN M), Engine Performance Wiring Diagrams (1 of 3) for Buick Century Limited 1997

List of elements for 3.1L (VIN M), Engine Performance Wiring Diagrams (1 of 3) for Buick Century Limited 1997:

• (engine harn, 11 cm from pcm breakout)
• (engine harn, 4 cm from pcm breakout)
• (on transaxle)
• (on transaxle) g129
• (under left side of i/p)
• 24x crank pos in
• 5v ref out
• A/c comp ctrl
• A/c request in
• A/c system
• Brake/tcc sw in
• Cam pos in
• Cam/crnk pos return
• Camshaft position sensor (right side of engine, below intake plenum)
• Cooling fans system
• Crank enable
• Crank signal fuse 10a
• Crankshaft position sensor (24x) (right side of engine, behind harmonic balancer)
• Cruise control system
• Cruise engaged sig
• Dlc class 2 data
• Ecm sense fuse 10a
• Egr ignition
• Egr valve sol ctrl
• Engine cool fan #1
• Engine cool fan #2
• Engine data sens grd
• Engine oil level indicator switch (lower front center of oil pan)
• Engine oil pressure switch (front of engine, above starter)
• Evap purge sol ctrl
• Evaporative emissions canister purge solenoid valve (top center rear of engine)
• Evaporative emissions canister vent solenoid valve (left rear wheel well)
• Fuel pump rly ctrl
• Fuse block
• G129
• G129 (on transaxle)
• Hot at all times
• Hot in off, run bulb test, or start
• Hot in run, bulb test, or start
• Hot in start
• Iac control
• Icm module bypass
• Idle air control (iac) valve (on side of throttle assembly)
• Ign 0 fuse 10a
• Ignition ctrl in
• Ignition ctrl ref hi
• Ignition ctrl ref lo
• Ignition feed
• Instrument cluster system
• Intake air temperature (iat) sensor (left front of engine compt)
• Maf sensor in
• Mass air flow sensor (left front of engine)
• Mil lamp control
• Nca
• Oil level input
• Oil pressure input
• Pcm ground
• Pcm-bcm fuse 10a
• Pnk
• Power (battery)
• Power (ignition)
• Powertrain control module (left front side of engine)
• S106
• S146
• S155
• S234
• S270
• Splice pack (sp250) (below i/p, right of steering column)
• Starting system
• Tan
• Tcc enable sol ctrl
• Tcc solenoid ctrl
• Trans range sw 'a'
• Trans range sw parity
• Underhood electrical center
• Vehicle speed sensor (on transaxle)
• Vss in
• Vss out-4000 ppm
• Vss return

3.1L (VIN M), Engine Performance Wiring Diagrams (2 of 3) for Buick Century Limited 1997

List of elements for 3.1L (VIN M), Engine Performance Wiring Diagrams (2 of 3) for Buick Century Limited 1997:

• (body harness, below left side of rear seat)
• (engine harn, 10 cm from generator breakout)
• (engine harn, above right side of radiator)
• (injector harn, 2 cm from injector 3 breakout)
• (on transaxle)
• (top center rear of engine block) ignition control module
• (top of transaxle) transaxle range switch
• B12
• B4 c2
• C1 e2
• Cluster fuse 10a
• Crankshaft position sensor (7x) (lower rear of engine)
• Elek ign fuse 15a
• Eng emis fuse 10a
• Engine coolant temperature sensor (top left side of engine)
• Exhaust gas recirc- ulation valve (top left side of engine)
• F/pmp fuse 15a
• Fuel level sensor
• Fuel pump
• Fuel pump relay
• Fuel tank
• Fuse block
• G129
• G129 (on transaxle)
• G313 (right side of rear shelf)
• Hot at all times
• Hot in run, bulb test or start
• Ignition amplifier and switching module
• Instrument cluster
• Malfunction indicator lamp
• Plugs spark
• Pnk
• S105
• S106
• S107
• S121
• S122
• S409
• Spark plugs
• Stoplamp switch (on brake pedal bracket)
• Tan
• Throttle position sensor (throttle assembly)
• Trans fuse 10a
• Underhood electrical center

3.1L (VIN M), Engine Performance Wiring Diagrams (3 of 3) for Buick Century Limited 1997

List of elements for 3.1L (VIN M), Engine Performance Wiring Diagrams (3 of 3) for Buick Century Limited 1997:

• (injector harn, 2 cm from breakout to injector 2)
• (on transaxle)
• 1-2 shift solenoid
• 2-3 shift solenoid
• A/c press sens in
• A/c refrigerant pressure sensor (right side of engine compt, below accumulator)
• A11
• Auto transaxle fluid temperature sensor
• B red
• Cruise control system
• Cruise inhibit out
• D10
• Ect sensor in
• Evap vent input
• F/injr fuse 15a
• Fuel inj 1 ctrl
• Fuel inj 2 ctrl
• Fuel inj 3 ctrl
• Fuel inj 4 ctrl
• Fuel inj 5 ctrl
• Fuel inj 6 ctrl
• Fuel injectors
• Fuel level sensor
• Fuel tank
• Fuel tank pressure in
• Fuel tank pressure sensor
• G129
• G129 (on transaxle)
• Gen out signal in
• Generator
• Generator monitor
• Heated oxygen sensor #2 (in exhaust pipe, behind catalyst)
• Heated oxygen sensor #1 (rear of engine, in exhaust manifold)
• Ho2s 1 hi in
• Ho2s 1 low in
• Ho2s 2 hi in
• Ho2s 2 low in
• Hot in run, bulb test and start
• Iat sensor in
• Knock sens in
• Knock sensor (front of engine, above starter)
• Linear egr pos sens in
• Manifold absolute pressure sensor (top rear of engine)
• Map sensor in
• Nca
• Oxy sen fuse 15a
• Pcm ground
• Pnk
• Powertrain control module (left front side of engine)
• Red
• S105
• S106
• S109
• Tan
• Tcc pwm solenoid
• Tcc solenoid
• Tp sensor in
• Trans range sw 'b' in
• Trans range sw 'c' in
• Trans shift sol 'a'
• Trans shift sol 'b'
• Trans temp sens in
• Transaxle
• Underhood electrical center