Repair manual
Buick Estate Wagon Repair Manual
Step-by-step repair and maintenance instructions for the Buick Estate Wagon (1990–1990): removal, installation, adjustment, diagnostics and parameter checks with illustrations.
66sections
384articles
ENManual language
- APPLICATIONS
- OVERVIEW
- TCC CONTROL COMPONENTS
- Brake Switch
- Coolant Temperature Sensor
- Electronic Control Module (ECM)
- TCC Solenoid Assembly
- Throttle Position Sensor (TPS)
- Vacuum Sensor
- Vehicle Speed Sensor (VSS)
- 3rd & 4th Gear Switch
- TROUBLE SHOOTING
- Problem in Electronic Control Module
- Electrical Problems
- Valve Body Assembly
- Oil Pump Assembly
- CONVERTER CLUTCH APPLY SLIPS, ROUGH OR SHUDDERS
- CONVERTER CLUTCH DOES NOT RELEASE
- DIAGNOSTIC TOOLS
- RETRIEVING TROUBLE CODES
- CLEARING TROUBLE CODES
- OUTPUT DISPLAYS
- DIAGNOSTIC CHARTS
- PFI CHART C-1 - ECM CHECK
- Notes On Fault Tree
- PFI Chart C-1 - ECM Check Flowchart
- Diagnostic Aids
- CODE 25, MANIFOLD AIR TEMPERATURE SENSOR SIGNAL VOLTAGE LOW - 5.0L & 5.7L TBI
- CODE 24, VEHICLE SPEED SENSOR - 2.8L PFI A & J BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH - 4.3L TBI B BODY
- CODE 24, VEHICLE SPEED SENSOR - 3.8L PFI - C & H BODIES
- CHART C-1A, PARK/NEUTRAL SWITCH - 3.8L PFI - C & H BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH - 3.8L PFI (TURBO) G BODY
- CODE 25, MANIFOLD AIR TEMPERATURE SENSOR SIGNAL VOLTAGE HIGH
- CHART C-8, TORQUE CONVERTER CLUTCH 2.3L PFI - N BODY
- CODE 24, VEHICLE SPEED SENSOR - 2.3L PFI - N BODY
- CODE 24, VEHICLE SPEED SENSOR 2.5L TBI - A BODY (WITH IN-DASH SPEED SENSOR)
- CHART C-8A, TRANSMISSION CONVERTER CLUTCH - 2.0L (VIN 1) TBI - J & L BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH - 2.0L PFI - J & N BODIES
- CODE 24, VEHICLE SPEED SENSOR 2.0L PFI - J & N BODIES
- CHART C-1A, PARK/NEUTRAL SWITCH - 2.0L PFI - J & N BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH - 2.0L (VIN K) & 2.5L TBI
- CHART C-8, TORQUE CONVERTER CLUTCH - 3.8L "3800" PFI BONNEVILLE, ELECTRA & NINETY-EIGHT
- CODE 24, VEHICLE SPEED SENSOR - 3.8L "3800" PFI - BONNEVILLE, ELECTRA & NINETY-EIGHT
- CHART C-8B, TORQUE CONVERTER CLUTCH - 3.3L "A" BODY W/THM 4T60 TRANSMISSION (1 OF 2)
- INTRODUCTION
- WASTEGATE/BOOST PRESSURE TEST
- WASTEGATE ACTUATOR
- WASTEGATE SOLENOID
- A/C ON SWITCH SYSTEM TEST
- A/C PRESSURE SENSOR (2.3L & 3.1L J BODY)
- A/C PRESSURE SWITCH
- BRAKE SWITCH
- CAMSHAFT SENSOR (3.8L VIN C)
- COOLANT LEVEL SENSOR/COOLANT LEVEL LIGHT
- COOLANT TEMPERATURE SENSOR (CTS)
- CRANKSHAFT POSITION SENSOR (2.3L IDI)
- CRANKSHAFT POSITION SENSOR (DIS)
- DUAL CRANK (COMBINATION) SENSOR (3.3L C(3)I SYSTEM)
- EGR POSITION SENSOR
- ENGINE OIL TEMPERATURE SENSOR (5.7L VIN 8)
- KNOCK SENSOR
- CAMSHAFT SENSOR/HALL EFFECT SWITCH (CADILLAC EXCEPT BROUGHAM)
- MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR
- MANIFOLD AIR TEMPERATURE (MAT) SENSOR
- MASS AIRFLOW SENSOR
- OXYGEN SENSOR (O2)
- P/N SWITCH
- POWER STEERING PRESSURE SWITCH (PSPS)
- PRESSURE/BARO SENSOR CARBURETED 5.0L (VIN Y)
- THROTTLE POSITION SENSOR (TPS)
- VEHICLE SPEED SENSOR (PM GENERATOR TYPE)
- VEHICLE SPEED SENSOR (LED TYPE)
- A/C RELAYS
- FUEL PUMP RELAY
- SOLENOIDS
- CANISTER PURGE SOLENOID
- MIXTURE CONTROL SOLENOID
- ILC/RVB/EGR SOLENOID
- IDLE AIR CONTROL (IAC) MOTOR
- IDLE SPEED CONTROL (ISC) MOTOR
- FUEL SYSTEM
- FUEL PRESSURE REGULATOR (PFI)
- FUEL PRESSURE REGULATOR (TBI)
- FUEL PUMP RELAY BY-PASS PROCEDURE
- FUEL CONTROL (CARBURETED)
- FLOAT LEVEL (ON-VEHICLE)
- HOT AIR CHOKE
- OXYGEN SENSOR
- VACUUM BREAK
- FUEL INJECTOR(S)
- INJECTOR BALANCE TEST
- IDLE SPEED CONTROL (ISC) MOTOR (CADILLAC EXCEPT BROUGHAM)
- IDLE SWITCH (CADILLAC EXCEPT BROUGHAM)
- IDLE LOAD COMPENSATOR (ILC)
- CHART C-4-1 (C3I MISFIRE AT IDLE 3.3L VIN N)
- CHART C-4-2 (C3I MISFIRE UNDER LOAD IDLE 3.3L VIN N)
- IGNITION SYSTEM (EXC. C3I)
- ELECTRONIC SPARK TIMING (EST) ADVANCE SYSTEM
- ELECTRONIC SPARK CONTROL (ESC) RETARD SYSTEM (WITHOUT ESC CONTROLLER)
- ELECTRONIC SPARK CONTROL (ESC) RETARD SYSTEM (WITH ESC CONTROLLER)
- AIR PUMP
- CHECK VALVE
- DECELERATION VALVE
- ELECTRIC DIVERT & ELECTRIC SWITCHING VALVE (EDES)
- PRESSURE OPERATED ELEC. DIVERT/ELEC. SWITCHING (PEDES)
- EARLY FUEL EVAPORATION (EFE) CARBURETED 5.0L (VIN Y)
- EARLY FUEL EVAPORATION SYSTEM CHECK
- EXHAUST GAS RECIRCULATION (EGR)
- SYSTEM TEST
- EGR CONTROL SOLENOID
- DIGITAL EGR VALVE
- POSITIVE BACKPRESSURE EGR VALVE
- NEGATIVE BACKPRESSURE EGR VALVE
- PULSE WIDTH MODULATED EGR VALVE
- INTEGRATED ELECTRONIC EGR VALVE
- FUEL EVAPORATION CONTROL
- CANISTER CONTROL VALVE (TYPE 1)
- CANISTER CONTROL VALVE (TYPE 2)
- EVAP PURGE VALVE SOLENOID
- FUEL TANK PRESSURE CONTROL VALVE
- THERMAL BOWL VENT VALVE (TBVV) CARBURETED 5.0L (VIN Y)
- CHECKING PCV VALVE FUNCTION
- PCV VALVE FUNCTION
- TEMPERATURE SENSOR
- VACUUM DIAPHRAGM MOTOR
- MISCELLANEOUS ECM CONTROLS
- A/C Clutch Relay
- A/C WOT CUT-OUT RELAY
- COOLING FAN
- COOLING FAN SYSTEM & QUAD-DRIVER CHECK
- COOLING FAN RELAY
- COOLING FAN MOTOR
- COOLANT LEVEL LIGHT
- HOT LIGHT OR COOLANT TEMPERATURE LIGHT
- CONVERTER CLUTCH SOLENOID
- CONVERTER LOCK-UP SIGNAL AT TRANSMISSION
- CONVERTER LOCK-UP SIGNAL FROM ECM
- SHIFT LIGHT (MANUAL TRANSMISSION)
- 1-4 SHIFT SYSTEM CHECK (MANUAL TRANSMISSION CORVETTE)
- 1-4 SHIFT LIGHT (MANUAL TRANSMISSION CORVETTE)
- 1-4 SHIFT RELAY (MANUAL TRANSMISSION CORVETTE)
- INTRODUCTION
- DESCRIPTION
- Hard Failures
- Intermittent Failures
- DIAGNOSTIC PROCEDURE
- RETRIEVING CODES (NON-SCAN)
- READING TROUBLE CODES
- HARD OR INTERMITTENT TROUBLE CODE DETERMINATION
- CLEARING TROUBLE CODES
- ECM LOCATION
- Diagnostic Aids
- System Performance Check (Carbureted)
- Special Tools (Diagnostic)
- SCAN TESTER USAGE
- SCAN DATA
- SUMMARY
- DIAGNOSTIC CIRCUIT CHECK
- SYSTEM PERFORMANCE CHECK
- CHART A-1, DWELL FIXED LESS THAN 10 DEGREES
- CHART A-2, DWELL FIXED BETWEEN 10°-50°
- CHART A-3, DWELL FIXED GREATER THAN 50 DEGREES
- CHART A-5, NO "SERVICE ENGINE SOON" LIGHT
- CHART A-6, "SES" LIGHT ON, WON'T FLASH CODE 12
- CHART B-1, RESTRICTED EXHAUST SYSTEM CHECK
- Check At Air Pipe
- Check At O2 Sensor
- Diagnosis
- CODE 12, NO DISTRIBUTOR REFERENCE PULSES
- CODE 13, OPEN OXYGEN SENSOR CIRCUIT
- CODE 14, COOLANT TEMP SENSOR SIGNAL VOLTAGE LOW
- CODE 15, COOLANT TEMP SENSOR SIGNAL VOLTAGE HIGH
- CODE 21, TPS SIGNAL VOLTAGE HIGH
- CODE 22, TPS SIGNAL VOLTAGE LOW
- CODE 23, M/C SOLENOID SIGNAL VOLTAGE LOW
- CODE 24, VEHICLE SPEED SENSOR
- CODE 31, CANISTER PURGE SOLENOID VOLT SIGNAL INCORRECT
- CODE 34, PRESSURE SENSOR SIGNAL VOLTAGE INCORRECT
- CODE 41, NO DISTRIBUTOR REFERENCE SIGNAL
- CODE 42, ELECTRONIC SPARK TIMING
- CODE 43, ELECTRONIC SPARK CONTROL SIGNAL VOLTAGE LOW
- CODE 44, LEAN EXHAUST INDICATION
- CODE 45, RICH EXHAUST INDICATION
- CODE 51, PROM
- CODE 53, EGR SYSTEM MALFUNCTION (CALIF ONLY)
- CODE 54, M/C SOLENOID SIGNAL VOLTAGE HIGH
- CHART C-1D, PRESSURE SENSOR
- CHART C-2C, IDLE LOAD COMPENSATOR
- CHART C-2D, REAR VACUUM BREAK
- CHART C-2F, TPS ENRICHMENT CHECK
- CHART C-3, CANISTER PURGE SOLENOID
- CHART C-4A, IGNITION SYSTEM CHECK
- CHART C-4K, ELECTRONIC SPARK TIMING PERFORMANCE CHECK
- CHART C-5, ELECTRONIC SPARK CONTROL
- CHART C-6A, AIR MANAGEMENT CHECK
- CHART C-7C, EGR CHECK
- CHART C-8, TORQUE CONVERTER CLUTCH ELECT DIAGNOSIS
- CHART C-9C, VACUUM ACTUATED EFE SYSTEM CHECK (NON-CEC)
- CHART C-10C, A/C CUT-OUT RELAY