Home/Buick/Century/Buick Century V (1982-1996)/Repair manual/Engine Controls - Tests W/codes - 3.1l/SUMMARY

Contents

Wiring diagrams Section: Engine Controls - Tests W/codes - 3.1l

INTRODUCTION

SELF-DIAGNOSTIC SYSTEM

HARD FAILURES

INTERMITTENT FAILURES

DIAGNOSTIC PROCEDURE

RETRIEVING CODES (NON-SCAN)

READING TROUBLE CODES

TROUBLE CODE DEFINITION

HARD OR INTERMITTENT TROUBLE CODE DETERMINATION

CLEARING TROUBLE CODES

ECM/PCM LOCATION

Diagnostic Aids

Field Service Mode Check (If Available)

SPECIAL TOOLS (DIAGNOSTIC)

SCAN TESTER USAGE

SCAN DATA

ECM/PCM CODE CHARTS

CODE P0101, MAF SENSOR CIRCUIT

CODE P0112, IAT SENSOR CKT LOW TEMPERATURE INDICATED

CODE P0113, IAT SENSOR CKT HIGH TEMPERATURE INDICATED

CODE P0117, COOLANT TEMP SENSOR LOW TEMP INDICATED

CODE P0118, COOLANT TEMP SENSOR HIGH TEMP INDICATED

CODE P0122, THROTTLE POSITION SENSOR SIGNAL VOLTAGE LOW

CODE P0123, THROTTLE POSITION SENSOR SIGNAL VOLTAGE HIGH

CODE P0131, HEATED O2 SENSOR LOW SIGNAL VOLTAGE (LEAN)

CODE P0132, HEATED O2 SENSOR HIGH SIGNAL VOLTAGE (RICH)

CODE P0134, HEATED OXYGEN SENSOR OPEN CIRCUIT

CODE P0321, IGNITION CONTROL 24X SIGNAL CIRCUIT ERROR

CODE P0325, KNOCK SENSOR ERROR

CODE P0341, CAMSHAFT POSITION SENSOR EXTRA CAM PULSES

CODE P0342, CAMSHAFT POSITION SENSOR CKT (LOSS OF CAM PULSES)

CODES P0501/P0502, VSS CIRCUIT

CODE P0703, TCC BRAKE SWITCH INPUT

CODE P0705, TRANSAXLE RANGE SWITCH

CODE P0712, TRANSAXLE TEMP SENSOR LOW TEMP INDICATED

CODE P0713, TRANSAXLE TEMP SENSOR HIGH TEMP INDICATED

CODE P0740, TORQUE CONVERTER CLUTCH

CODE P0755, TRANSMISSION SHIFT SOLENOID "B"

CODE P1350/1361, IC CIRCUIT OPEN

CODES P1403/P1404/P1405, EGR ERROR

CODE P1530, A/C REFRIGERANT PRESSURE

CODE P1550, CRUISE STEPPER MOTOR

CODE P1623, PROM ERROR

CODE P1630, SYSTEM VOLTAGE HIGH/LOW

CODE P1640, QDM "A" CIRCUIT

CODE P1650, QDM "B" CIRCUIT

SUMMARY

All sections

SUMMARY Buick Century V

Engine Controls - Tests W/codes - 3.1l 3 illustrations ~101 words

SUMMARY

If no hard fault codes are present, driveability symptoms exist or intermittent codes exist, proceed to TESTS W/O CODES article in this section for diagnosis by symptom (i.e., ROUGH IDLE, NO START, etc.) or intermittent diagnostic procedures.

3.1L (VIN M) PCM Wiring Diagram (1 Of 3). Scheme 53

Scheme 53: 3.1L (VIN M) PCM Wiring Diagram (1 Of 3)

Scheme 53: 3.1L (VIN M) PCM Wiring Diagram (1 Of 3)

3.1L (VIN M) PCM Wiring Diagram (2 Of 3). Scheme 54

Scheme 54: 3.1L (VIN M) PCM Wiring Diagram (2 Of 3)

Scheme 54: 3.1L (VIN M) PCM Wiring Diagram (2 Of 3)

3.1L (VIN M) PCM Wiring Diagram (3 Of 3). Scheme 55

Scheme 55: 3.1L (VIN M) PCM Wiring Diagram (3 Of 3)

Scheme 55: 3.1L (VIN M) PCM Wiring Diagram (3 Of 3)

See also:
• BASIC TESTING
• TESTS W/O CODES
• SYSTEM/COMPONENT TESTS - 3.1L
• RETRIEVING CODES (NON-SCAN)
• HARD OR INTERMITTENT TROUBLE CODE DETERMINATION
• CLEARING TROUBLE CODES