Repair manual
Buick LeSabre VI Repair Manual
Step-by-step repair and maintenance instructions for the Buick LeSabre VI (1986–1991): removal, installation, adjustment, diagnostics and parameter checks with illustrations.
- MODEL IDENTIFICATION
- DESCRIPTION
- BASIC DIAGNOSTIC PROCEDURE
- DIAGNOSTIC MATERIALS
- DIAGNOSTIC CHARTS
- DIAGNOSTIC AIDS
- FIELD SERVICE MODE CHECK (FUEL INJECTED MODELS)
- SPECIAL DIAGNOSTIC TOOLS
- SCAN TESTER USAGE
- SCAN TESTER - TEST DATA PARAMETERS
- DIAGNOSTIC CIRCUIT CHECK
- "SCAN" DIAGNOSTIC CIRCUIT CHECK
- CHART A1 - NO "SERVICE ENGINE SOON" LIGHT
- WON'T FLASH CODE 12 "SERVICE ENGINE SOON" ("SES") LIGHT ON
- CHART A3 - ENGINE CRANKS BUT WILL NOT RUN (3.0L VIN L)
- CIRCUIT DESCRIPTION FOR STEPS 1-6 (1 OF 3, 3.0L VIN L)
- CIRCUIT DESCRIPTION FOR STEPS 7-11 (2 OF 3, 3.0L VIN L)
- CIRCUIT DESCRIPTION FOR STEPS 12 & 13 (3 OF 3, 3.0L VIN L)
- ENGINE CRANKS BUT WON'T RUN (3.8L NON-TURBO WITH TYPE I IGNITION SYSTEM)
- IGNITION SYSTEM IDENTIFICATION
- CIRCUIT DESCRIPTION FOR STEPS 1-6 (1 OF 3, 3.8L NON-TURBO WITH TYPE I IGNITION SYSTEM)
- CIRCUIT DESCRIPTION FOR STEPS 7-11 (2 OF 3, 3.8L NON-TURBO WITH TYPE I IGNITION SYSTEM)
- CIRCUIT DESCRIPTION FOR STEPS 12-14 (3 OF 3, 3.8L NON-TURBO WITH TYPE I IGNITION SYSTEM)
- ENGINE CRANKS BUT WON'T RUN (1 OF 3, 3.8L NON-TURBO WITH TYPE II IGNITION SYSTEM)
- CIRCUIT DESCRIPTION FOR STEPS 1-6 (1 OF 3, TYPE II IGNITION)
- CIRCUIT DESCRIPTION FOR STEPS 7-11 (2 OF 3, 3.8L NON-TURBO WITH TYPE II IGNITION SYSTEM)
- CIRCUIT DESCRIPTION - STEPS 12-14 (3 OF 3, 3.8L NON-TURBO WITH TYPE II IGNITION SYSTEM)
- CHART A3 - ENGINE CRANKS BUT WON'T RUN (3.8L TURBO)
- CHART A5 - FUEL SYSTEM ELECT. TEST (3.0L VIN L, "N" BODY)
- CHART A5 - FUEL SYSTEM ELECTRICAL TEST (3.8L)
- CHART A7 - FUEL PRESSURE TEST - ALL ENGINES
- CHART B1 - RESTRICTED EXHAUST SYSTEM CHECK
- Check At Air Pipe
- Check At O2 Sensor
- Diagnosis
- CHART C1 - ECM REPLACEMENT CHECK CHART
- CHART C1A - PARK/NEUTRAL SWITCH
- CHART C1E - POWER STEERING PRESSURE SWITCH CHECK
- CHART C2A - INJECTOR BALANCE TEST
- CHART C2C - IDLE AIR CONTROL
- CHART C3 - CANISTER PURGE CHECK
- CHART C4E - 3.8L TYPE I IGNITION
- CHART C4F - 3.8L TYPE II IGNITION
- TEST DESCRIPTION FOR STEPS 1-5 (3.0L VIN L)
- TEST DESCRIPTION FOR STEPS 1-5 (3.8L VINs 3 & 7)
- TEST DESCRIPTION FOR STEPS 1-4 (3.0L VIN L & 3.8L VINs 3 & 7)
- CHART C4G - 3.8L TYPE I TURBO IGNITION
- CHART C5 - ELECTRONIC SPARK CONTROL
- CHART C7 - EXHAUST GAS RECIRCULATION
- CHART C8 - TORQUE CONVERTER CLUTCH (3.0L "N" BODY)
- TORQUE CONVERTER CLUTCH (TCC) 3.8L NON-TURBO, "A", "C", & "H" BODIES)
- TORQUE CONVERTER CLUTCH (TCC) (3.8L TURBO "G" BODY)
- CHART C10A - A/C CLUTCH (3.0L & 3.8L NON-TURBO)
- CHART C10D - A/C CLUTCH CONTROL (3.8L TURBO "G" BODY)
- CHART C10E - A/C CLUTCH CONTROL (3.8L TURBO "G" BODY)
- CHART C12A - COOLANT FAN CHECK (3.0L VIN L, "N" BODY)
- CHART C12B - FAN ON AT ALL TIMES (3.0L VIN L, "N" BODY)
- CHART C12C - NO LOW SPEED FAN (3.0L VIN L, "N" BODY)
- CHART C12A - COOLANT FAN CHECK (1 OF 3, ALL 3.8L EXCEPT 3.8L TURBO "G" BODY)
- CHART C12B - FAN ALWAYS ON (2 OF 3, ALL 3.8L EXCEPT 3.8L TURBO "G" BODY)
- CHART C12C - NO LOW SPEED FAN (3 OF 3, ALL 3.8L EXCEPT 3.8L TURBO "G" BODY)
- CHART C12A - 2-SPEED COOLANT FAN CHECK (3.8L TURBO "G" BODY)
- CHART C12B - FAN ON AT ALL TIMES (3.8L TURBO "G" BODY)
- CHART C12C - NO LOW SPEED FAN (3.8L TURBO "G" BODY)
- Circuit Description
- Fan Relay
- Coolant Fan Relay
- VO8 Fan Relay
- MODEL IDENTIFICATION
- DIAGNOSTIC SYSTEM OPERATION
- "HARD FAILURES"
- "INTERMITTENT FAILURES"
- BASIC DIAGNOSTIC PROCEDURE
- READING TROUBLE CODES
- ECM TROUBLE CODE DEFINITIONS
- TROUBLE CODE DETERMINATION (HARD OR INTERMITTENT)
- CLEARING TROUBLE CODES
- DIAGNOSTIC MATERIALS
- DIAGNOSTIC CHARTS
- DIAGNOSTIC AIDS
- SYSTEM PERFORMANCE CHECK (CARBURETED MODELS)
- SPECIAL TOOLS (DIAGNOSTIC)
- SCAN TESTER USAGE
- SCAN DATA TABLES - FULL FUNCTION CARBURETED
- DIAGNOSTIC CIRCUIT CHECK
- SYSTEM PERFORMANCE CHECK
- CHART A1 - DWELL FIXED LESS THAN 10 DEGREES
- CHART A2 - DWELL FIXED BETWEEN 10-45 OR 50 DEGREES
- CHART A3 - DWELL FIXED GREATER THAN 45 OR 50 DEGREES
- CHART A5 - NO "SERVICE ENGINE SOON" LIGHT
- CHART A6 - WON'T FLASH CODE 12
- CHART B1 - RESTRICTED EXHAUST SYSTEM CHECK
- CHECKING AT AIR PIPE
- CHECKING 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 CIRCUIT LOW
- CODE 24 - VEHICLE SPEED SENSOR
- CHART 24B - PARK/NEUTRAL CIRCUIT
- CODE 31 - CANISTER PURGE SOLENOID VOLTAGE SIGNAL HIGH 5.0L (VIN Y) B & D BODIES
- CODE 32 - BARO SENSOR VOLTAGE SIGNAL LOW
- CODE 34 - DIFFERENTIAL PRESSURE (VAC) SENSOR
- CODE 41 - NO DISTRIBUTOR REFERENCE SIGNAL
- CODE 42 - ELECTRONIC SPARK TIMING
- CODE 43 - ELECTRONIC SPARK CONTROL (ESC) SIGNAL VOLTAGE LOW (5.0L VINS G & H, & 5.7L VIN 6)
- CODE 43 - ELECTRONIC SPARK CONTROL (ESC) SIGNAL VOLTAGE LOW (5.0L VIN Y)
- CODE 44 - LEAN EXHAUST INDICATION
- CODE 45 - RICH EXHAUST INDICATION
- CODE 51 - FAULTY PROM
- CODE 53 - EGR CONTROL ERROR 5.0L (VIN Y) D BODY
- CODE 53 - EGR CONTROL ERROR (5.0L EXC. VIN Y, D BODY & 5.7L)
- CODE 54 - M/C SOLENOID SIGNAL VOLTAGE HIGH
- CHART C1D - MAP & BARO CHECK (5.0L & 5.7L)
- CHART C1E - DIFFERENTIAL PRESSURE (VAC) SENSOR CHECK (5.0L & 5.7L)
- CHART C2B - IDLE STOP SOLENOID (5.0L VINS G & H & 5.7L VIN 6)
- CHART C2C - IDLE LOAD COMPENSATOR CHECK (5.0L VIN Y)
- CHART C2D - REAR VACUUM BREAK (5.0L VIN Y) B, D & G BODIES
- CHART C2F - TPS ENRICHMENT CHECK 5.0L & 5.7L
- CHART C3 - CANISTER PURGE SOLENOID 5.0L VINS G/H & 5.7L VIN 6
- CHART C3 - CANISTER PURGE SOLENOID (5.0L VIN Y, B BODY)
- CHART C4A - IGNITION SYSTEM CHECK (5.0L & 5.7L)
- CHART C4K - ELECTRONIC SPARK TIMING PERFORMANCE CHECK
- CHART C5 - ELECTRONIC SPARK CONTROL
- CHART C6A - AIR MANAGEMENT CHECK 5.0L & 5.7L
- PULSE WIDTH MODULATED (PWM) EGR (5.0L VIN G & H, & 5.7 VIN 6)
- CHART C7C - EGR CHECK 5.0L (VIN Y)
- TORQUE CONVERTER CLUTCH (TCC) ELECTRICAL DIAGNOSIS 5.0L & 5.7L (1 OF 2)
- TORQUE CONVERTER CLUTCH (TCC) 700-4R ELECTRICAL DIAGNOSIS - 5.0L & 5.7L (2 OF 2)
- CHART C9C - VACUUM ACTUATED EFE SYSTEM (5.0/5.7L)
- CHART C10C - A/C CUT-OUT RELAY 5.0L (VIN Y) B & D BODIES
- DESCRIPTION
- 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 SLIPPING, ROUGH OR SHUDDERS
- CONVERTER CLUTCH DOES NOT RELEASE
- DIAGNOSTIC TOOLS
- RETRIEVING TROUBLE CODES
- Entering ECM Diagnostic Mode
- CLEARING TROUBLE CODES
- ENTERING SERVICE (DIAGNOSTIC) MODE
- Reatta & Riviera
- Toronado
- DATA DISPLAYS
- INPUT DISPLAYS
- OUTPUT DISPLAYS
- TCC DIAGNOSTIC CHARTS
- CHART C-8, TORQUE CONVERTER CLUTCH - CARBURETED PASSENGER CARS (1 AND 2 OF 3)
- Diagnostic Aids
- CHART C-8, TORQUE CONVERTER CLUTCH - CARBURETED PASSENGER CARS (3 OF 3)
- CODE 24, VEHICLE SPEED SENSOR - CARBURETED PASSENGER CARS
- CHART C-8, TORQUE CONVERTER CLUTCH 2.0L & 2.5L TBI - A, J, N & P BODIES
- CODE 24, VEHICLE SPEED SENSOR 2.0L & 2.5L TBI - A, J & N BODIES (WITH PM GENERATOR)
- CODE 24, VEHICLE SPEED SENSOR 2.5L TBI - A BODY (WITH IN-DASH SPEED SENSOR)
- CODE 24, VEHICLE SPEED SENSOR 2.5L TBI - P BODY
- CHART C-1A, PARK/NEUTRAL SWITCH 2.0L & 2.5L TBI - A, J, N & P BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 2.0L (VIN 1) TBI - J & L BODIES
- CODE 24, VEHICLE SPEED SENSOR 2.0L (VIN 1) TBI - J BODY
- CODE 24, VEHICLE SPEED SENSOR 2.0L (VIN 1) TBI - L BODY
- CHART C-1A, PARK/NEUTRAL SWITCH 2.0L (VIN 1) TBI - J & L BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 4.3L & 5.0L (VIN E) TBI B, F & G BODIES (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 4.3L & 5.0L (VIN E) TBI B, F & G BODIES (2 OF 2)
- CODE 24, VEHICLE SPEED SENSOR 4.3L TBI - B & G BODIES
- CODE 24, VEHICLE SPEED SENSOR 5.0L (VIN E) TBI - F BODY
- CHART C-1A, PARK/NEUTRAL SWITCH 4.3L & 5.0L (VIN E) TBI - B, F & G 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 2.3L PFI - N BODY
- CODE 24, VEHICLE SPEED SENSOR 2.3L PFI - N BODY
- CHART C-1A, PARK/NEUTRAL SWITCH 2.3L PFI - N BODY
- CHART C-8, TORQUE CONVERTER CLUTCH 2.8L PFI - A, J, L & P BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 2.8L PFI A & W BODIES WITH 440-T4 (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 2.8L PFI A & W BODIES WITH 440-T4 (2 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 2.8L, 5.0L & 5.7L PFI - F BODY (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 2.8L, 5.0L & 5.7L PFI - F BODY (2 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 5.7L PFI - Y BODY (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 5.7L PFI - Y BODY (2 OF 2)
- CODE 24, VEHICLE SPEED SENSOR 2.8L, 5.0L & 5.7L PFI A, F, J, P & Y BODIES
- CODE 24, VEHICLE SPEED SENSOR 2.8L PFI - L & W BODIES
- CHART C-1A, PARK/NEUTRAL SWITCH 2.8L, 5.0L & 5.7L PFI A, F, J, L, P, W & Y BODIES
- CHART C-1, ECM QUAD-DRIVER CHECK 2.8L PFI - F & P BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 3.0L PFI - N BODY
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L PFI - A, C & H BODIES (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L PFI - A, C & H BODIES (2 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L PFI (TURBO) - G BODY
- CODE 24, VEHICLE SPEED SENSOR 3.0L & 3.8L PFI - A, C, G & H BODIES
- CHART C-1A, PARK/NEUTRAL SWITCH 3.0L & 3.8L PFI - A, C, G & H BODIES
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L "3800" PFI BONNEVILLE, ELECTRA & NINETY-EIGHT (1 OF 2)
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L "3800" PFI BONNEVILLE, ELECTRA & NINETY-EIGHT (2 OF 2)
- CODE 24, VEHICLE SPEED SENSOR 3.8L "3800" PFI BONNEVILLE, ELECTRA & NINETY-EIGHT
- CODE 31, PARK/NEUTRAL SWITCH 3.8L "3800" PFI BONNEVILLE, ELECTRA & NINETY-EIGHT
- CHART C-8, TORQUE CONVERTER CLUTCH 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE EO24, VEHICLE SPEED SENSOR 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE EO27, EO28, & EO29 2ND, 3RD & 4TH GEAR SWITCH 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE EO31, PARK/NEUTRAL SWITCH 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE EO38, BRAKE SWITCH 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE EO39, TORQUE CONVERTER CLUTCH 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- CODE B124, VEHICLE SPEED SENSOR 3.8L "3800" PFI REATTA, RIVIERA & TORONADO
- Note On Intermittents
- CODE B127, GEAR SELECTOR SWITCH 3.8L "3800" PFI - TORONADO
- Circuit Description
- Test Description
- MODEL IDENTIFICATION
- DESCRIPTION & OPERATION
- DIAGNOSTIC SYSTEM OPERATION
- "HARD FAILURES"
- "INTERMITTENT FAILURES"
- BASIC DIAGNOSTIC PROCEDURE
- READING TROUBLE CODES
- ECM TROUBLE CODE DEFINITIONS
- TROUBLE CODE DETERMINATION (HARD OR INTERMITTENT)
- CLEARING TROUBLE CODES
- DIAGNOSTIC MATERIALS
- Diagnostic Charts
- Diagnostic Aids
- FIELD SERVICE MODE CHECK (FUEL INJECTED MODELS)
- SPECIAL DIAGNOSTIC TOOLS
- SCAN TESTER USAGE
- SCAN TESTER - TEST DATA PARAMETERS
- DIAGNOSTIC CONNECTOR LOCATION
- DIAGNOSTIC CIRCUIT CHECK
- "SCAN" DIAGNOSTIC CIRCUIT CHECK
- DIAGNOSTIC TROUBLE CODE IDENTIFICATION
- CHART A1 - NO "SERVICE ENGINE SOON" LIGHT
- Won't Flash Code 12 "Service Engine Soon" ("SES") Light On
- CHART A3 - ENGINE CRANKS BUT WILL NOT RUN (3.0L VIN L)
- Circuit Description For Steps 1-6 (1 Of 3, 3.0L VIN L)
- Circuit Description For Steps 7-11 (2 Of 3, 3.0L VIN L)
- Circuit Description For Steps 12 & 13 (3 Of 3, 3.0L VIN L)
- Engine Cranks But Won't Run (3.8L Non-Turbo With Type I Ignition System)
- Ignition System Identification
- Circuit Description For Steps 1-6 (1 Of 3, 3.8L Non-Turbo With Type I Ignition System)
- Circuit Description For Steps 7-11 (2 Of 3, 3.8L Non-Turbo With Type I Ignition System)
- Circuit Description For Steps 12-14 (3 Of 3, 3.8L Non-Turbo With Type I Ignition System)
- Engine Cranks But Won't Run (1 Of 3, 3.8L Non-Turbo W/ Type II Ignition System)
- Circuit Description For Steps 1-6 (1 Of 3, Type II Ignition)
- Circuit Description For Steps 7-11 (2 Of 3, 3.8L Non-Turbo With Type II Ignition System)
- Circuit Description - Steps 12-14 (3 Of 3, 3.8L Non-Turbo With Type II Ignition System)
- CHART A3 - ENGINE CRANKS BUT WON'T RUN (3.8L TURBO)
- CHART A5 - FUEL SYSTEM ELECT. TEST (3.0L VIN L, "N" BODY)
- CHART A5 - FUEL SYSTEM ELECTRICAL TEST (3.8L)
- CHART A7 - FUEL PRESSURE TEST - ALL ENGINES
- CHART B1 - RESTRICTED EXHAUST SYSTEM CHECK
- Check At Air Pipe
- Check At O2 Sensor
- Diagnosis
- CHART C1 - ECM REPLACEMENT CHECK CHART
- CHART C1A - PARK/NEUTRAL SWITCH
- CHART C1E - POWER STEERING PRESSURE SWITCH CHECK
- CHART C2A - INJECTOR BALANCE TEST
- CHART C2C - IDLE AIR CONTROL
- CHART C3 - CANISTER PURGE CHECK
- CHART C4E - 3.8L TYPE I IGNITION
- CHART C4F - 3.8L TYPE II IGNITION
- Test Description For Steps 1-5 (3.0L VIN L)
- Test Description For Steps 1-5 (3.8L VIN's 3 & 7)
- Test Description For Steps 1-4 (3.0L VIN L & 3.8L VIN's 3 & 7)
- CHART C4G - 3.8L TYPE I TURBO IGNITION
- CHART C5 - ELECTRONIC SPARK CONTROL
- CHART C7 - EXHAUST GAS RECIRCULATION
- CHART C8 - TORQUE CONVERTER CLUTCH (3.0L "N" BODY)
- Torque Converter Clutch (TCC) (3.8L Non-Turbo, "A", "C", & H" Bodies)
- Torque Converter Clutch (TCC) (3.8L Turbo "G" Body)
- CHART C10A - A/C CLUTCH (3.0L & 3.8L NON-TURBO)
- CHART C10D - A/C CLUTCH CONTROL (3.8L TURBO "G" BODY)
- CHART C10E - A/C CLUTCH CONTROL (3.8L TURBO "G" BODY)
- Chart C12A - Coolant Fan Check (3.0L VIN L, "N" Body)
- Chart C12B - Fan On At All Times (3.0L VIN L, "N" Body)
- Chart C12C - No Low Speed Fan (3.0L Vin L, "N" Body)
- Chart C12A - Coolant Fan Check (1 Of 3, All 3.8L Except 3.8L Turbo "G" Body)
- Chart C12B - Fan Always On (2 Of 3, All 3.8L Except 3.8L Turbo "G" Body)
- Chart C12C - No Low Speed Fan (3 Of 3, All 3.8L Except 3.8L Turbo "G" Body)
- Chart C12A - 2-Speed Coolant Fan Check (3.8L Turbo "G" Body)
- Chart C12B - Fan On At All Times (3.8L Turbo "G" Body)
- Chart C12C - No Low Speed Fan (3.8L Turbo "G" Body)
- Chart C12D - Coolant Fan Check (1 Of 3, A/C Equipped W/O Heavy Duty Cooling - 3.8L "A" Body)
- Chart C12E - Coolant Fan Check (2 Of 3, A/C Equipped W/O Heavy Duty Cooling - 3.8L "A" Body)
- Chart C12F - Coolant Fan Check (3 Of 3, A/C Equipped W/O Heavy Duty Cooling - 3.8L "A" Body)
- Chart C12G - Coolant Fan On At All Times (A/C Equipped W/O Heavy Duty Cooling - 3.8L "A" Body)
- Chart C12H - Coolant Fan Check (1 Of 3, A/C Equipped W/Heavy Duty Cooling - 3.8L "A" Body)
- Chart C12I - Coolant Fan Check (2 Of 3, A/C Equipped W/Heavy Duty Cooling - 3.8L "A" Body)
- Chart C12J - Coolant Fan Check (3 Of 3, A/C Equipped W/Heavy Duty Cooling - 3.8L "A" Body)
- Chart C12K - Coolant Fan On At All Times (A/C Equipped W/Heavy Duty Cooling - 3.8L "A" Body)
- CODE 13 - OPEN OXYGEN (O2) SENSOR CIRCUIT
- Coolant Temperature Sensor (CTS) Signal Voltage Low
- Coolant Temperature Sensor (CTS) Signal Voltage High
- CODE 21 - THROTTLE POSITION SENSOR SIGNAL VOLTAGE HIGH
- Throttle Position Sensor (TPS) Signal Voltage Low
- Manifold Air Temperature (MAT) Sensor Signal Voltage High
- CODE 24 - VEHICLE SPEED SENSOR
- Manifold Air Temperature (MAT) Sensor Signal Voltage Low
- CODE 31 - WASTEGATE SOLENOID (3.8L TURBO "G" BODY)
- CODE 32 - EGR VACUUM CONTROL CIRCUIT
- CODE 33 - MASS AIRFLOW (MAF) SENSOR
- CODE 34 - MASS AIRFLOW (MAF) SENSOR
- Cam Sensor Signal (3.8L Non-Turbo VIN 3 & 3.8L Turbo VIN 7)
- CODE 42 - EST IGNITION CIRCUIT
- CODE 43 - ELECTRONIC SPARK CONTROL
- CODE 44 - LEAN EXHAUST INDICATION
- CODE 45 - RICH EXHAUST INDICATION
- CODE 51 - PROM ERROR (FAULTY OR INCORRECT PROM)
- CODE 52 - CALPAK ERROR (FAULTY OR INCORRECT CALPAK)
- CODE 55 ECM ERROR
- DIAGNOSTIC CIRCUIT CHECK
- SELF-DIAGNOSTIC SYSTEM
- DIAGNOSTIC TROUBLE CODE IDENTIFICATION
- CHART A1 NO "SERVICE ENGINE SOON" LIGHT
- Diagnostic Aids
- CHART A2, WON'T FLASH CODE 12, SERVICE ENGINE SOON LIGHT ON
- CHART A3, ENGINE CRANKS BUT WILL NOT RUN
- CHART A5, FUEL SYSTEM ELECT. TEST (NON-DIGITAL CLUSTER)
- CHART A5, FUEL SYSTEM ELECT. TEST (DIGITAL CLUSTER)
- CHART A7, FUEL PRESSURE TEST
- CHART B1, RESTRICTED EXHAUST SYSTEM CHECK
- Check at O2 Sensor
- Diagnosis
- CHART C2, IDLE AIR CONTROL (IAC) VALVE CHECK
- CHART C2A, INJECTOR BALANCE TEST
- CHART C3, CANISTER PURGE CHECK
- CHART C4F1, C(3)I MISFIRE AT IDLE
- CHART C4F2, C(3)I MISFIRE UNDER LOAD
- CHART C5, ELECTRONIC SPARK CONTROL (ESC) SYSTEM CHECK
- CHART C7, EXHAUST GAS RECIRCULATION (EGR) FLOW CHECK
- CHART C8A, TORQUE CONVERTER CLUTCH (TCC) (1 OF 2)
- CHART C8A, TORQUE CONVERTER CLUTCH (TCC) (2 OF 2)
- CHART C10A, A/C CLUTCH CONTROL (1 OF 2)
- CHART C10A, A/C CLUTCH CONTROL (2 OF 2)
- CHART C12A, COOLANT FAN CHECK
- CHART C12B, COOLANT FAN CHECK
- CHART C12C, COOLANT FAN CHECK
- CODE 13, OPEN OXYGEN SENSOR CIRCUIT
- CODE 14, COOLANT TEMP. CIRCUIT HIGH TEMP. INDICATED
- CODE 15, COOLANT SENSOR SIGNAL, LOW TEMPERATURE INDICATED
- CODE 16, SYSTEM VOLTAGE HIGH
- CODE 21, TPS SIGNAL VOLTAGE HIGH
- CODE 22, TPS SIGNAL VOLTAGE LOW
- CODE 23, MAT SENSOR SIGNAL VOLTAGE HIGH
- CODE 24, VEHICLE SPEED SENSOR (VSS) CIRCUIT
- CODE 25, MAT SENSOR CIRCUIT (HIGH TEMP INDICATED)
- CODE 26, QUAD DRIVER MODULE (QDM) ERROR
- CODE 27, 28 & 29, 2ND, 3RD, 4TH GEAR SWITCH DIAGNOSIS
- CODE 31, PARK/NEUTRAL SWITCH CIRCUIT
- CODE 34, MASS AIRFLOW (MAF) SENSOR CIRCUIT
- CODE 38, BRAKE SWITCH CIRCUIT
- CODE 39, TORQUE CONVERTER CLUTCH (TCC) CIRCUIT
- CODE 41, CAM SENSOR CIRCUIT
- All Updated Information
- Circuit Description
- Test Description
- CODE 42, EST IGNITION CIRCUIT
- CODE 43, ELECTRONIC SPARK CONTROL (ESC) CIRCUIT
- CODE 44, OXYGEN SENSOR CIRCUIT (LEAN EXHAUST INDICATED)
- Diagnostics Aids
- CODE 45, OXYGEN SENSOR CIRCUIT (RICH EXHAUST INDICATED)
- CODE 48, MISFIRE DIAGNOSIS
- CODE 51, MEM-CAL ERROR
- CODE 63, 64 & 65, EGR FLOW CHECK
- ECM TERMINAL ID