ENGINE PERFORMANCE — Buick Century Limited 2000 — SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.1L

3.1L VIN M, Engine Performance Wiring Diagrams (1 of 4) for Buick Century Limited 2000

List of elements for 3.1L VIN M, Engine Performance Wiring Diagrams (1 of 4) for Buick Century Limited 2000:

• (left of starter, on transaxle stud)
• (on transaxle stud)
• (pin 11-12 not used)
• (pin 14-15 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
• 24x ref
• 3x ref
• A/c press return
• Air sol relay
• Bank 1 ks signal
• Bypass control
• Camshaft position sensor (cmp) (front of eng, below intake plenum)
• Cmp signal
• Connector (dlc) (under left side of dash, right of steering column)
• Cooling fan system
• Crankshaft position (ckp) sensor (7x) (right side of of eng, below manifold)
• Crankshaft position sensor (24x) (front of eng, behind harmonic balancer)
• Cruise control system
• Cruise disable output
• Data link
• Ecm fuse 10a
• Egr val ign pos volt
• Elek ign fuse 15a
• Eng emis fuse 10a
• Evap can purge control
• F/injr fuse 15a
• Fuel inj 1 control
• Fuel inj 2 control
• Fuel inj 3 control
• Fuel inj 5 control
• Fuel inj 6 control
• G129
• High speed fans control
• Ho2s 1 sig low
• Ho2s 2 sig low
• Hot at all times
• Hot in off, run bulb test, or start
• Hot in run, bulb test or start
• I/p fuse block (behind right side of dash, in right door opening)
• Iac valve b high
• Iat sensor ground
• Ic control
• Ign 0 fuse 10a
• Ignition amplifier and switching module
• Ignition control module (top right side of eng)
• Ignition power
• Knock sensor (ks) bank 1 (left side lower eng, above starter)
• Low speed fans control
• Maf sensor signal
• Map sensor
• Map/ect sensor signal
• Pcm ground
• Pnk
• Pnk b
• Power (battery)
• Powertrain control module (pcm) (left front side of eng compt, in air cleaner assembly)
• Red
• Ref low
• S106
• S270
• Sensor ground
• Sensor return
• Serial data (class 2)
• Spark plugs
• Splice pack sp205
• Tan
• Tcc brake switch input
• Tp sensor signal
• Tr switch input b
• Underhood fuse block (mounted to right strut tower)
• Vss high
• Vss low
• Vss output

3.1L VIN M, Engine Performance Wiring Diagrams (2 of 4) for Buick Century Limited 2000

List of elements for 3.1L VIN M, Engine Performance Wiring Diagrams (2 of 4) for Buick Century Limited 2000:

• Air pump fuse 30a
• Air pump relay
• D10
• Evaporative emissions (evap) canister purge solenoid valve (top right side of eng, behind ignition control module)
• Evaporative emissions (evap) canister vent solenoid valve (behind left side of rear fascia splash shield, in wheelwell)
• Fuel injectors
• G108 (left side of front end upper tie bar)
• G129 (on transaxle stud)
• Hot at all times
• Hot in run & start
• Nca
• Pcm dev fuse 10a
• Pnk
• Red
• S105
• S109
• Secondary air injection reaction pump motor (air)
• Secondary injection pump bypass valve solenoid
• Stoplight switch (on brake pedal support bracket)
• Tan
• Transaxle range switch (on top right rear of transaxle)
• Underhood fuse block (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 Buick Century Limited 2000

List of elements for 3.1L VIN M, Engine Performance Wiring Diagrams (3 of 4) for Buick Century Limited 2000:

• (body harn, under rear seat)
• (engine harn, 4 cm from pcm breakout)
• (fuel inj harn, 2 cm from fuel inj 3 breakout)
• (left side of eng, in air cleaner duct) mass airflow (maf) sensor
• (lower left side of eng, above starter) engine oil pressure indicator switch
• (on bottom of engine oil pan) engine oil level indicator switch
• (on throttle body assembly) idle air control (iac) valve
• A/c refrigerant pressure sensor (on left side of eng compt, on accumulator)
• B12
• Engine coolant temperature (ect) sensor (top left side of eng, below throttle body)
• Exhaust gas recirculation (egr) valve (top rear of eng, near throttle body)
• F c
• Fuel tank pressure sensor (in fuel tank)
• G129 (on transaxle stud)
• Generator
• Instrument cluster
• Intake air temperature (iat) sensor (left rear of eng compt, in air cleaner duct)
• L b
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (top right side of eng, above valve cover)
• Pnk
• Red
• S106
• S121
• S167
• S409
• Tan
• Throttle position (tp) sensor (on throttle body assembly)
• Underhood fuse block c1 (mounted to right strut tower)

3.1L VIN M, Engine Performance Wiring Diagrams (4 of 4) for Buick Century Limited 2000

List of elements for 3.1L VIN M, Engine Performance Wiring Diagrams (4 of 4) for Buick Century Limited 2000:

• (on transaxle stud)
• (pin 12-15 not used)
• (pin 31-32 not used)
• (pin 36-38 not used)
• (pin 45-48 not used)
• (pin 51-54 not used)
• (pin 62-65 not used)
• (pin 8-9 not used)
• (right side of rear shelf)
• 1-2 shift solenoid
• 2-3 shift solenoid
• 5 volt ref
• 5v ref a
• A/c compress clutch rly
• A/c refrig press signal
• A/c request signal
• A11
• Air conditioning system
• Air pmp relay
• Auto transaxle fluid temperature sensor
• Ckp sens
• Ckp sens return
• Cluster fuse 10a
• Cmp/ckp sensor batt (+)
• Cmp/ckp sensor ground
• Crank
• Crank signal fuse 10a
• Cruise control system
• Cruise status
• D10
• Ect sensor signal
• Egr pintle position signal
• Egr val control
• Eng oil level ind in
• Eng oil press switch in
• Evap can vent sol control
• F/pmp fuse 15a
• F/pump
• Fuel inj 4 control
• Fuel level sensor
• Fuel level sensor input
• Fuel pump
• Fuel pump relay control
• Fuel tank
• Fuel tank press signal
• G129
• G129 (on transaxle stud)
• G313
• Gen terminal f output
• Gen terminal l output
• Heated oxygen sensor 1 (ho2s 1) (in right side exhaust manifold)
• Heated oxygen sensor 2 (ho2s 2) (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
• Hot in start
• I/p fuse block (behind right side of dash, in right door opening)
• Iac coil a high
• Iac coil a low
• Iac coil b low
• Iat sensor signal
• Ignition positive volt
• Map sensor signal
• Mil control
• Nca
• Oxy sen fuse 15a
• Pcm- bcm fuse 10a
• Pnk
• Powertrain control module (pcm) (left front side of eng compt, in air cleaner assembly)
• Red
• Relay
• S105
• S106
• S234
• Sensor ground
• Starter enable control
• Starting/ charging system
• Tan
• Tcc pwm sol val control
• Tcc pwm solenoid
• Tft sensor signal
• Tp sensor signal
• Tps ref tp switch
• Tr switch input a
• Tr switch input c
• Tr switch input p
• Trans fuse 10a
• Transaxle
• Underhood fuse block (mounted to right strut tower)