ENGINE PERFORMANCE – Buick Century Custom 2005 – SYSTEM WIRING DIAGRAMS

ENGINE PERFORMANCE

3.1L VIN J

3.1L VIN J, Engine Performance Wiring Diagram (1 of 4) for Buick Century Custom 2005

List of elements for 3.1L VIN J, Engine Performance Wiring Diagram (1 of 4) for Buick Century Custom 2005:

• (behind data link connector) splice pack sp205
• (lower right front of engine, on transaxle stud, left of starter) g113
• (pin 14-15 not used)
• (pin 2-3 not used)
• (pin 23-27 not used)
• (pin 34-37 not used)
• (pin 39-42 not used)
• (pin 49-52 not used)
• (pin 66-67 not used)
• (under left side of dash, right of steer column) data link connector (dlc)
• 1-2 ss valve control
• 2-3 ss valve control
• A/c press return
• A/t iss hi sig
• A/t iss low sig
• Bank 1 ks signal
• Camshaft position sensor (cmp) (top front of engine, below intake plenum)
• Ckp sensor a
• Cmp signal
• Cooling fan system
• Crankshaft position (ckp) sensor a (front of engine, behind harmonic balancer)
• Crankshaft position (ckp) sensor b (right side of engine, below exhaust manifold)
• Cruise control system
• Cruise disable output
• Ecm fuse 22 10a
• Egr val ign pos volt
• Elek ign fuse 25 15a
• Eng emis fuse 30 10a
• Eng spd sig
• Evap can purge control
• F/injr fuse 28 15a
• Fuel inj 1 control
• Fuel inj 2 control
• Fuel inj 3 control
• Fuel inj 5 control
• Fuel inj 6 control
• G111 (lower left front of engine, on transaxle stud, left of starter)
• High speed fans control
• Ho2s sig low
• Hot at all times
• Hot in off, run or start
• Hot in run 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 (icm) (top right side of engine)
• Ignition power
• Knock sensor (ks) 1 (lower left side of engine, above starter)
• Low ref
• Low speed fans control
• Maf sensor signal
• Map sensor
• Map/ect sensor ref
• 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
• S187
• S270
• Sensor ground
• Sensor return
• Serial data (class 2)
• Spark plugs
• Tcc brake switch input
• Tp sensor ref
• Tr switch input b
• Underhood fuse block (mounted to right strut tower)
• Vss high
• Vss low
• Vss output

3.1L VIN J, Engine Performance Wiring Diagram (2 of 4) for Buick Century Custom 2005

List of elements for 3.1L VIN J, Engine Performance Wiring Diagram (2 of 4) for Buick Century Custom 2005:

• Automatic transmission
• Automatic transmission fluid pressure manual valve position switch
• Evaporative emissions (evap) canister purge solenoid valve (top right side of engine, behind ignition control module)
• Evaporative emissions (evap) canister vent solenoid valve (behind left side of rear fascia splash shield, in wheelwell)
• Fuel injectors (on intake manifold)
• G113 (lower right front of engine, on transaxle stud, left of starter)
• Iss sensor
• Pnk
• Pressure control solenoid valve
• S106
• S109
• Stoplight switch (on brake pedal support bracket)
• Transmission internal mode switch
• Vehicle speed sensor (vss) (on transaxle right axle case extension)

3.1L VIN J, Engine Performance Wiring Diagram (3 of 4) for Buick Century Custom 2005

List of elements for 3.1L VIN J, Engine Performance Wiring Diagram (3 of 4) for Buick Century Custom 2005:

• (compartment, 4 cm from powertrain control module breakout)
• (fuel injector jumper harness, midway between fuel injector 3 breakout & map sensor breakout)
• (left side of engine, in air cleaner duct) mass airflow (maf) sensor
• (lower left side of engine, above starter) engine oil pressure (eop) switch
• (on throttle body assembly) idle air control (iac) valve
• A/c refrigerant pressure sensor (at left front strut tower, on a/c liquid line)
• B12
• Engine coolant temperature (ect) sensor (top left side of engine, below throttle body)
• Exhaust gas recirculation (egr) valve (top rear of engine, near throttle body)
• Fuel tank pressure (ftp) sensor (on top of fuel tank)
• G113 (lower right front of engine, on transaxle stud, left of starter)
• Generator
• Instrument cluster
• Intake air temperature (iat) sensor (left front of engine compt, in air cleaner duct)
• L b
• Logic
• Malfunction indicator lamp
• Manifold absolute pressure (map) sensor (top right side of engine, above valve cover)
• P r n
• Pnk
• Red
• S106
• S121
• S167
• S409
• Tan
• Throttle position (tp) sensor (on throttle body assembly)
• To right strut tower)
• Underhood fuse block (mounted c1

3.1L VIN J, Engine Performance Wiring Diagram (4 of 4) for Buick Century Custom 2005

List of elements for 3.1L VIN J, Engine Performance Wiring Diagram (4 of 4) for Buick Century Custom 2005:

• (behind right side of dash, in right door opening)
• (inside rear compt, below right side of rear window trim panel)
• (lower right front of engine, on transaxle stud, left of starter)
• (not used)
• (pin 12-15 not used)
• (pin 31-32 not used)
• (pin 40-41 not used)
• (pin 47 not used)
• (pin 51-54 not used)
• (pin 64-65 not used)
• (pin 8-9 not used)
• 1-2 shift sol vlv
• 2-3 shift sol valve a
• 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
• Automatic transmission
• 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 press switch in
• Evap can vent sol control
• F/pmp fuse 35 15a
• F/pump relay
• Fluid temp sensor
• Fuel inj 4 control
• Fuel level sensor
• Fuel level sensor input
• Fuel pump
• Fuel pump prime con- nec- tor
• Fuel pump relay control
• Fuel pump sender assembly
• Fuel tank press signal
• G113
• G402
• 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
• Ho2s htr lo ctrl
• Ho2s low ctrl
• Hot at all times
• Hot in run or start
• Hot in start
• I/p fuse block
• 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 29 15a
• Pc sol hi
• Pc sol lo
• Pcm- bcm fuse 10a
• Pnk
• Powertrain control module (pcm) (left front side of engine compt, in air cleaner assembly)
• Red
• S106
• S115 red
• S234
• Sensor ground
• Starter enable control
• Starting/ charging system
• Tan
• Tcc pwm sol val control
• Tcc rel sw sig
• Tcc sol valve
• Tft sensor signal
• Tp sensor signal
• Tps 5 volt ref
• Tr switch input a
• Tr switch input c
• Tr switch input p
• Trans fuse 26 10a
• Underhood fuse block (mounted to right strut tower)