Buick Century Limited 2002 - 2002 GENERAL MOTORS Century & Regal

Buick Century Limited 2002 - BUZZERS, RELAYS & TIMERS

Buick Century Limited 2002 BUZZERS, RELAYS & TIMERS LOCATION

Component	Location
Back-Up Lamp Relay	Behind left side of dash, mounted to multi-purpose bracket near BCM. See Fig. 8 .
Headlamp Relay	Behind glove box, mounted to underside of cross-car beam. See Fig. 9 .
Park Lamp Relay	Behind right side of dash, on cross-car beam.
Rear Compartment Lid Release Relay	Behind glove box, mounted to underside of cross-car beam. See Fig. 9 .
Rear Window Defogger Relay	Behind glove box, mounted to underside of cross-car beam. See Fig. 9 .
Retained Accessory Power (RAP) Relay	Behind glove box, mounted to underside of cross-car beam. See Fig. 9 .
Turn Signal/Hazard Flasher Module	Below left side of dash, mounted on multi-purpose bracket near BCM. See Fig. 8 .

Buick Century Limited 2002 - CIRCUIT PROTECTION DEVICES

Buick Century Limited 2002 CIRCUIT PROTECTION DEVICES LOCATION

Component	Location
Fusible Link	Left side of engine, on starter assembly.
I/P Fuse Block	Behind right side of dash, in right door opening. See Fig. 10 .
Underhood Fuse Block	Mounted to right front strut tower.

Buick Century Limited 2002 - CONTROL UNITS

Buick Century Limited 2002 CONTROL UNITS LOCATION

Component	Location
Blower Motor Control Processor (W/ Auto A/C)	Behind right side of dash, in HVAC module. See Fig. 10 .
Body Control Module (BCM)	Behind left side of dash, left of steering column.
Cruise Control Module (CCM)	Front of left strut tower.
Electronic Brake Control Module (EBCM)	At left side of engine compartment, near strut tower.
Heated Seat Control Module (Driver)	Below driver's seat.
Heated Seat Control Module (Front Passenger)	Below right front seat.
Ignition Control Module (ICM) (3.1L VIN J)	Top right side of engine. See Fig. 1 .
Ignition Control Module (ICM) (3.8L VIN K)	Top front of engine.
Ignition Control Module (ICM) (3.8L VIN 1)	Top front of engine.
Inflatable Restraint Sensing & Diagnostic Module (SDM)	Below carpet, under right front seat.
Powertrain Control Module (PCM)	Left front side of engine compartment, in air cleaner assembly.
Radio Antenna Module	On rear window header panel, above headliner.
Remote Control Door Lock Receiver (RCDLR)	Behind instrument cluster.
Sun Roof Module (Express Open)	Center rear of sun roof.
Vehicle Communication Interface Module (VCIM)	On rear of left rear wheelhouse.

Buick Century Limited 2002 - MOTORS

Buick Century Limited 2002 MOTORS LOCATION

Component	Location
Air Temperature Actuator (Left)	Left side of HVAC module.
Air Temperature Actuator (Right)	Right side of HVAC module.
Blower Motor	Behind right side of dash, in HVAC module. See Fig. 10 .
Cooling Fan Motor (Left)	On left side of radiator.
Cooling Fan Motor (Right)	On right side of radiator.
Fuel Pump & Sender Assembly	In fuel tank.
Idle Air Control (IAC) Valve (3.1L VIN J)	On throttle body assembly. See Fig. 2 .
Idle Air Control (IAC) Valve (3.8L VIN K)	On throttle body assembly. See Fig. 4 .
Idle Air Control (IAC) Valve (3.8L VIN 1)	On throttle body assembly. See Fig. 4 .
Sun Roof Motor	Center rear of sun roof module.
Windshield Washer Fluid Pump	On right front corner of engine compartment, in washer fluid reservoir.
Windshield Wiper Motor	On left side of firewall, below air inlet screen.

Buick Century Limited 2002 - SENDING UNITS & SENSORS

Buick Century Limited 2002 SENDING UNITS & SENSORS LOCATION

Component	Location
A/C Refrigerant Pressure Sensor	At left front strut tower, on A/C liquid line.
Air Temperature Sensor (Inside)	At left side of dash, below instrument cluster.
Ambient Air Temperature Sensor (Outside)	Front of radiator support.
Ambient Light Sensor	On top right side of dash, near defogger outlet.
Camshaft Position (CMP) Sensor (3.1L VIN J)	Top front of engine, below intake plenum.
Camshaft Position (CMP) Sensor (3.8L VIN K)	Front of engine, above crankshaft pulley.
Camshaft Position (CMP) Sensor (3.8L VIN 1)	Front of engine, above crankshaft pulley.
Crankshaft Position (CKP) Sensor (3.8L VIN K)	Front of engine, behind harmonic balancer.
Crankshaft Position (CKP) Sensor (3.8L VIN 1)	Front of engine, behind harmonic balancer.
Crankshaft Position (CKP) Sensor A (3.1L VIN J)	Front of engine, behind harmonic balancer. See Fig. 3 .
Crankshaft Position (CKP) Sensor B (3.1L VIN J)	Right side of engine, below exhaust manifold. See Fig. 1 .
Engine Coolant Temperature (ECT) Sensor (3.1L VIN J)	Top left side of engine, below throttle body.
Engine Coolant Temperature (ECT) Sensor (3.8L VIN K)	Top left side of engine, below throttle body. See Fig. 6 .
Engine Coolant Temperature (ECT) Sensor (3.8L VIN 1)	Top left side of engine, below throttle body. See Fig. 6 .
Fuel Pump & Sender Assembly	In fuel tank.
Fuel Tank Pressure (FTP) Sensor	On top of fuel tank.
Heated Oxygen Sensor (HO2S) 1	In right side exhaust manifold.
Heated Oxygen Sensor (HO2S) 2	In exhaust system, rear of catalytic converter.
Inflatable Restraint Side Impact Sensor (Left Front)	At base of left "B" pillar.
Intake Air Temperature (IAT) Sensor (3.1L VIN J)	Left front of engine compartment, in air cleaner duct.
Intake Air Temperature (IAT) Sensor (3.8L VIN K)	Left front of engine compartment, in air cleaner duct. See Fig. 4 .
Intake Air Temperature (IAT) Sensor (3.8L VIN 1)	Left front of engine compartment, in air cleaner duct. See Fig. 4 .
Knock Sensor (KS) 1 (3.1L VIN J)	Lower left side of engine, above starter. See Fig. 3 .
Knock Sensor (KS) 1 (3.8L VIN K)	Left side of engine, in front of starter. See Fig. 5 .
Knock Sensor (KS) 1 (3.8L VIN 1)	Left side of engine, in front of starter. See Fig. 5 .
Knock Sensor (KS) Bank 2	Lower right side of engine, below exhaust manifold.
Manifold Absolute Pressure (MAP) Sensor (3.1L VIN J)	Top right side of engine, above valve cover.
Manifold Absolute Pressure (MAP) Sensor (3.8L VIN K)	Top of engine, on front of intake manifold.
Manifold Absolute Pressure (MAP) Sensor (3.8L VIN 1)	Top right side of engine, above valve cover.
Mass Airflow (MAF) Sensor (3.1L VIN J)	Left side of engine, in air cleaner duct.
Mass Airflow (MAF) Sensor (3.8L VIN K)	Top rear of engine, part of throttle body assembly. See Fig. 4 .
Mass Airflow (MAF) Sensor (3.8L VIN 1)	Top rear of engine, part of throttle body assembly. See Fig. 4 .
Rear Compartment Occupant Sensor	At left side of rear compartment.
Sunload Sensor	On top right side of dash, near defogger outlet.
Throttle Position (TP) Sensor (3.1L VIN J)	On throttle body assembly. See Fig. 2 .
Throttle Position (TP) Sensor (3.8L VIN K)	On throttle body assembly. See Fig. 4 .
Throttle Position (TP) Sensor (3.8L VIN 1)	On throttle body assembly. See Fig. 4 .
Vehicle Speed Sensor (VSS)	On transaxle right axle case extension.
Wheel Speed Sensor (WSS) (Left Front)	On left front wheel hub assembly.
Wheel Speed Sensor (WSS) (Left Rear)	On left rear wheel hub assembly.
Wheel Speed Sensor (WSS) (Right Front)	On right front wheel hub assembly.
Wheel Speed Sensor (WSS) (Right Rear)	On right rear wheel hub assembly.

Buick Century Limited 2002 - SOLENOIDS & SOLENOID VALVES

Buick Century Limited 2002 SOLENOIDS & SOLENOID VALVES LOCATION

Component	Location
A/T Shift Lock Control Solenoid (Century)	In column shift.
Evaporative Emissions (EVAP) Canister Purge Solenoid (3.1L VIN J)	Top right side of engine, behind ignition control module.
Evaporative Emissions (EVAP) Canister Purge Solenoid (3.8L VIN K)	Top left side of engine, near center of valve cover.
Evaporative Emissions (EVAP) Canister Purge Solenoid (3.8L VIN 1)	Top right side of engine, near center of valve cover.
Evaporative Emissions (EVAP) Canister Vent Solenoid	Behind left side of rear fascia splash shield, in wheelwell.
Exhaust Gas Recirculation (EGR) Valve (3.1L VIN J)	Top rear of engine, near throttle body. See Fig. 2 .
Exhaust Gas Recirculation (EGR) Valve (3.8L VIN K)	On top right rear of engine.
Exhaust Gas Recirculation (EGR) Valve (3.8L VIN 1)	On top right rear of engine.
Magnasteer Actuator	On top left of steering rack.
Park Lock Solenoid	In steering column, near ignition key cylinder.
Secondary Air Injection (AIR) Solenoid (3.8L VIN K)	On right side of engine, above exhaust manifold.
Secondary Air Injection (AIR) Solenoid (3.8L VIN I)	On right side of engine, above exhaust manifold.
Supercharger Boost Control Solenoid (3.8L VIN 1)	Top left rear of engine, forward of coolant outlet.
Vacuum Control Assembly	On right side of HVAC module. See Fig. 10 .

Buick Century Limited 2002 - SWITCHES

Buick Century Limited 2002 SWITCHES LOCATION

Component	Location
A/T Shift Lock Control Switch (Regal)	Under center of console.
Brake Fluid Level Switch	In brake fluid reservoir.
Coolant Level Switch	Mounted on right side of radiator.
Cruise Control Release Switch	Under left side of dash, on brake pedal bracket.
Engine Oil Level Switch (3.1L VIN J)	On bottom of engine oil pan.
Engine Oil Level Switch (3.8L VIN K)	On bottom of engine oil pan. See Fig. 5 .
Engine Oil Level Switch (3.8L VIN 1)	On bottom of engine oil pan. See Fig. 5 .
Engine Oil Pressure (EOP) Switch (3.1L VIN J)	Lower left side of engine, above starter. See Fig. 3 .
Engine Oil Pressure (EOP) Switch (3.8L VIN K)	Lower right side of engine, above transaxle.
Engine Oil Pressure (EOP) Switch (3.8L VIN 1)	Lower right side of engine, above transaxle.
Park Brake Switch	On parking brake assembly.
Park/Neutral Position (PNP) Switch	On top right rear of transaxle. See Fig. 7 .
Seat Belt Switch (Driver)	Part of driver's seat belt assembly.
Stoplamp Switch	On brake pedal support bracket.
Windshield Washer Fluid Level Switch	Right front corner of engine compartment, in washer fluid reservoir.

Buick Century Limited 2002 - MISCELLANEOUS

Buick Century Limited 2002 MISCELLANEOUS LOCATION

Component	Location
Audio Amplifier	Under rear package shelf.
Blower Motor Resistor Assembly (W/ Man A/C)	Under right side of dash, in right side of HVAC module. See Fig. 10 .
Data Link Connector (DLC)	Under left side of dash, right of steering column.
Radio Noise Suppressor	At upper right corner of rear window.

Buick Century Limited 2002 - CONNECTORS

Buick Century Limited 2002 CONNECTORS LOCATION

Component	Location
C101 (Gray, 20 Pin)	Left side of engine compartment, on strut tower.
C102 (Black, 16 Pin)	On right rear of engine compartment, near generator.
C105 (Gray, 4 Pin)	On radiator, between left & right cooling fans.
C110 (Black, 8 Pin)	On right top of engine, above fuel injector No. 3.
C113 (20 Pin)	Left side of engine compartment, top of transaxle.
C120 (Gray, 3 Pin)	Lower right side of engine compartment, below battery tray.
C125 (Black, 1 Pin)	On left rear corner of power steering pump.
C126 (Gray, 2 Pin)	On top center of engine, near injector No. 5.
C171 (Gray, 2 Pin)	Near top of left front strut tower.
C172 (Gray, 2 Pin)	Near top of right front strut tower.
C200 (Black, 56 Pin)	Behind right side of dash. See Fig. 10 .
C201 (Black, 48 Pin)	Behind dash, on right side of steering column.
C204 (Natural, 22 Pin)	Behind right side of dash, near shroud.
C205 (Black, 4 Pin)	Behind dash, on right side of steering column.
C206 (Black, 3 Pin)	Behind right side of dash, near C200.
C207 (Black, 2 Pin)	In steering column.
C215 (Yellow, 2 Pin)	Behind dash, on right side of steering column.
C216 (Yellow, 2 Pin)	Behind dash, on right side of steering column.
C240 (Natural, 10 Pin)	In console, behind console shift.
C241 (Natural, 2 Pin)	In console, behind console shift.
C242 (Black, 3 Pin)	Behind ashtray.
C290	Below right side of dash.
C301	On left "A" pillar.
C302	On right "A" pillar.
C311 (Black, 6 Pin)	Below driver seat.
C312 (Black, 6 Pin)	Below passenger seat.
C351 (Black, 10 Pin)	On left "B" pillar.
C352	On right "B" pillar.
C390 (Black, 8 Pin)	On right side of package shelf support.
C395 (Black, 2 Pin)	Under right side of package shelf.
C398 (Black, 3 Pin)	Behind right "C" pillar trim panel.
C399	Top right side of rear package shelf.
C401 (Gray, 6 Pin)	In rear compartment, behind left taillamp.
C402 (Gray, 6 Pin)	In rear compartment, behind right taillamp.
C403 (Black, 8 Pin)	In rear compartment.
C404	Left side of rear compartment.
C405	Rear compartment floor, forward of spare tirewell.
C410 (Black, 8 Pin)	Right side of rear compartment, above wheelhouse.
C411 (Black, 9 Pin)	Used in place of occupant sensor.
C420 (Blue, 2 Pin)	In rear compartment, under center of package shelf.
C915 (Black, 4 Pin)	In center of rear compartment lid applique.

Buick Century Limited 2002 - GROUNDS

Buick Century Limited 2002 GROUNDS LOCATION

Component	Location
G100	Right side of engine compartment, at base of battery.
G101	Front left side of radiator support.
G102	Front right side of radiator support.
G111 (3.1L VIN J)	Lower left front of engine, on transaxle stud, left of starter.
G111 (3.8L VIN K)	Right front of engine, on ignition control module bracket.
G111 (3.8L VIN 1)	Right front of engine, on ignition control module bracket.
G113 (3.1L VIN J)	Lower left front of engine, on transaxle stud, left of starter.
G113 (3.8L VIN K)	Lower left front of engine, on transaxle stud, left of starter. See Fig. 5 .
G113 (3.8L VIN 1)	Lower left front of engine, on transaxle stud, left of starter. See Fig. 5 .
G117 (3.1L VIN J)	Lower left front of engine, on transaxle stud, left of starter.
G117 (3.8L VIN K)	Lower left front of engine, on transaxle stud, left of starter. See Fig. 5 .
G117 (3.8L VIN 1)	Lower left front of engine, on transaxle stud, left of starter. See Fig. 5 .
G171 (3.1L VIN J)	Lower left front of engine, on transaxle stud, left of starter.
G171 (3.8L VIN K)	Lower left front of engine, on transaxle stud, left of starter. See Fig. 5 .
G171 (3.8L VIN 1)	Lower left front of engine, on transaxle stud, left of starter. See Fig. 5 .
G200	Behind right side of dash compartment. See Fig. 10 .
G201	Below dash, left side of steering column.
G203	Below dash, right side of steering column.
G301	Inside left door sill, forward of left front seat.
G401	Inside rear compartment, below left side of rear window trim panel.
G402	Inside rear compartment, below right side of rear window trim panel.

Buick Century Limited 2002 - SPLICES

Buick Century Limited 2002 SPLICES LOCATION

Component	Location
S101	Cooling fan jumper harness, 20 cm from left connector to engine cooling fan motor.
S102	Cooling fan jumper harness, 20 cm from left connector to engine cooling fan motor.
S103	Cooling fan jumper harness, 19.5 cm from right connector to engine cooling fan motor.
S104	Cooling fan jumper harness, 19.5 cm from right connector to engine cooling fan motor.
S105	Engine wiring harness, front of engine compartment, 4 cm from C105 breakout.
S106	Engine wiring harness, left side of engine compartment, 7 cm from PCM breakout.
S109 (3.1L VIN J)	Fuel injector wiring harness, top of engine, 2 cm from fuel injector No. 2 breakout.
S109 (3.8L VIN K)	Engine wiring harness, top left of engine 6 cm from C110 breakout.
S109 (3.8L VIN 1)	Engine wiring harness, top left of engine 6 cm from C110 breakout.
S115	Automatic transaxle wiring harness, inside transaxle housing, 19 cm from C113.
S121	Fuel injector jumper harness, midway between fuel injector No. 3 breakout, & MAP sensor breakout.
S124	Forward lamp wiring harness, below left headlamp, 7 cm from left headlamp breakout.
S144	ICM harness, 12 cm from ICM.
S145	ICM harness, 18 cm from ICM.
S167	Engine wiring harness, left side of engine compartment, 4 cm from PCM breakout.
S202	I/P wiring harness, right side of steering column, 19 cm from radio breakout.
S203	I/P harness, above instrument cluster, 4 cm from foglamp switch, instrument cluster breakout.
S205	I/P wiring harness, below dash, near C201, 14 cm from G201 breakout.
S211	I/P wiring harness, right side of steering column, 20 cm from instrument cluster breakout.
S220	I/P wiring harness, right side of steering column, 18 cm from G200 breakout.
S221	I/P wiring harness, right side of steering column, 17 cm from data link connector breakout.
S228	I/P wiring harness, right side of dash, 24 cm from G200 breakout.
S230	I/P wiring harness, 18 cm from radio breakout.
S231	I/P wiring harness, 33 cm from HVAC control module connector.
S233	I/P wiring harness, behind center of dash, 4 cm from radio breakout.
S234	I/P wiring harness, right side of steering column, 13 cm from instrument cluster breakout.
S240	I/P wiring harness, right side of steering column near C201, 1 cm from SP205 breakout.
S241	I/P wiring harness, lower I/P below radio, 15 cm from radio breakout.
S242	I/P wiring harness, lower dash below radio, 22 cm from radio breakout.
S249	I/P wiring harness, near steering column, 4 cm from C201 breakout.
S258	I/P wiring harness, 4 cm left of HVAC control module breakout.
S263	I/P wiring harness, near blower motor, 4 cm from door lock relay breakout.
S264	I/P wiring harness, 4 cm from C200 breakout.
S267	I/P wiring harness, right side of dash, below glove compartment, 11 cm from G200 breakout.
S268	I/P wiring harness, right side of dash, 7 cm from breakout for group of four relays.
S269	I/P wiring harness, near blower motor, 13 cm from door lock relay breakout.
S270	I/P wiring harness, behind right side of dash, 4 cm from blower motor control module.
S283	I/P wiring harness, left side of steering column, 4 cm from headlamp switch breakout.
S291	I/P wiring harness, 7 cm from data link connector breakout, toward C201.
S292	I/P wiring harness, midway between headlamp switch breakout & back-up lamp relay breakout.
S295	Ashtray jumper wiring harness, inside ashtray, 5 cm from C242.
S301	Body wiring harness, right outside floor, next to passenger seat, 40 cm from C312 breakout.
S302	Main body wiring harness, 4 cm from SDM breakout, toward C312.
S303	Body wiring harness, on floor, under drivers seat, 10 cm from C311 breakout.
S307	Body wiring harness, on floor near center of vehicle, 20 cm from C325.
S314	Body wiring harness, below right side of front passenger seat, 4 cm from G302 breakout.
S315	Body wiring harness, below right front passenger seat, 35.5 cm from C311 breakout.
S323	Body wiring harness, floor, on top of tunnel between front seat, 10 cm from C250 breakout.
S325	Body wiring harness, left side floor, under drivers seat, 23 cm from G301 breakout.
S326	Body wiring harness, below right front seat, 60 cm from C312 breakout.
S330	Driver seat adjuster wiring harness, 20 cm from C311 breakout.
S333	Passenger seat wiring harness, 20 cm from C312 breakout.
S334	Front floor console wiring harness in console.
S335	Front floor console wiring harness, inside console, 6.5 cm from auxiliary power outlet breakout.
S336	Front floor console wiring harness, inside console, 20 cm from C240.
S382	Quarter courtesy & reading lamp wiring harness, left side of windshield header, 4 cm from left sunshade mirror breakout.
S383	Quarter courtesy & reading lamp wiring harness, left side of windshield header, 10.5 cm from left sunshade mirror breakout.
S385	Quarter courtesy & reading lamp wiring harness, 13 cm from right sunshade mirror breakout.
S386	Quarter courtesy & reading lamp wiring harness, 6.5 cm from right sunshade mirror breakout.
S392	Quarter courtesy & reading lamp wiring harness, 6.5 cm from dome light breakout.
S400	Body wiring harness, 4 cm from rear compartment courtesy lamp breakout.
S402	Right taillamp wiring harness, 3 cm from P402.
S403	Left taillamp wiring harness, 3 cm from P401.
S406	Body wiring harness, right side of rear compartment, 4 cm from right radio speaker breakout.
S408	Body wiring harness, right side of rear compartment, 33 cm from C390 breakout.
S409	Body wiring harness, below rear window panel between C405 & C405 breakout, 10 cm from C405 breakout.
S410	Body wiring harness, left floor, under rear seat, 7 cm from C405 breakout.
S414	Body wiring harness, inside near right side of rear compartment, 5 cm from C420 breakout.
S416	CHMSL wiring harness, center of rear package shelf, 38.5 cm from CHMSL.
S417	CHMSL wiring harness, center of rear package shelf, 20.5 cm from CHMSL.
S418	Main body wiring harness, 7 cm from rear compartment courtesy lamp breakout.
S424	Main body wiring harness, 9 cm from rear compartment courtesy lamp breakout.
S431	Left taillamp wiring harness, 5 cm from P401.
S432	Right taillamp wiring harness, 5 cm from P402.
S433	Occupant sensor pigtail used in place of sensor, 9.5 cm from C411.
S434	Occupant sensor pigtail used in place of sensor, 15 cm from C411.
S440	Body wiring harness, in rear compartment, 6.5 cm from right rear radio speaker breakout.
S504	Left front door wiring harness, in left front door, 8 cm from master window switch breakout.
S506	Left front door wiring harness, 4 cm from driver door lock switch breakout.
S604	Right front door wiring harness, in right front door, 8 cm from front passenger window switch breakout.
S606	Left front door wiring harness, 4 cm from driver door lock switch breakout.
S905	Rear compartment lid wiring harness, in rear compartment lid, 38 cm from P932.
S915	Back-up lamp wiring harness, in rear compartment lid, 17 cm from P415.
S919	Back-up lamp wiring harness, in rear compartment lid, 23 cm from P415.