Home/Chevrolet/Pickup C1500/Chevrolet Pickup C1500 (1988-2000)/Repair manual/Engine Controls - Tests W/codes - 4.3l/CODE 54, FUEL PUMP CIRCUIT

Contents

Section: Engine Controls - Tests W/codes - 4.3l

INTRODUCTION

TERMINOLOGY

SELF-DIAGNOSTIC SYSTEM

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

Field Service Mode Check

SPECIAL TOOLS (DIAGNOSTIC)

SCAN TESTER USAGE

SCAN TESTER DATA

TROUBLE CODE CHARTS - 4.3L (EXC M/T "S" & "T" SERIES PICKUP)

CODE 13, OPEN OXYGEN SENSOR CIRCUIT

CODE 14, COOLANT SENSOR SIGNAL VOLTAGE LOW

CODE 15, COOLANT SENSOR SIGNAL VOLTAGE HIGH

CODE 16, VSS BUFFER FAULT - "G", "L", "M", "S" & "T" SERIES

CODE 21, TPS SIGNAL VOLTAGE HIGH

CODE 22, TPS SIGNAL VOLTAGE LOW

CODE 23, INTAKE AIR TEMPERATURE LOW

CODE 24, VSS - "P" SERIES M/T & "S" & "T" SERIES UTIL VEH M/T

CODE 24, VSS - 4.3L "T" SERIES PICKUP M/T

CODE 24, VSS TRANSMISSION OUTPUT SIGNAL - "G", "L" & "M" SERIES, "P" SERIES M/T & "S" & "T" SERIES A/T

CODE 25, INTAKE AIR TEMPERATURE HIGH

CODE 32, EGR CIRCUIT ERROR WITH LINEAR EGR

CODE 32, EGR CIRCUIT ERROR - "P" SERIES 4.3L M/T

CODE 32, EGR CIRCUIT ERROR - MODELS USING MANIFOLD VACUUM, 2-TERMINAL SOLENOID & BACKPRESSURE EGR

CODE 32, EGR CKT ERROR MODELS USING PORTED VACUUM & EVRV SOL

CODE 33, MAP SENSOR SIGNAL VOLTAGE HIGH

CODE 34, MAP SENSOR SIGNAL VOLTAGE LOW

CODE 35, IDLE SPEED ERROR

IAC Valve Reset Procedure

System Too Lean

System Too Rich

Throttle Body

IAC Valve Connections

PCV Valve

CODE 36, IDLE SPD ACTUATOR FAULT - "C", "K" & "P" SERIES A/T

CODE 42 - IGNITION CONTROL

CODE 43, KNOCK SENSOR (DUAL SENSORS) - "S" & "T" SERIES

CODE 43, KNOCK SENSOR W/O SPARK MODULE (SINGLE SENSOR) - "C", "G", "K" & "P" SERIES A/T

CODE 43, KNOCK SENSOR WITH SPARK CONTROL MODULE - "C", "K" & "P" SERIES

CODE 44, LEAN EXHAUST INDICATION

O2 Sensor Wire

Fuel Contamination

Fuel Pressure

Exhaust Leaks

CODE 45, RICH EXHAUST INDICATION

Fuel Pressure High

Ignition Ground

Fuel Canister

MAP Sensor

TPS

O2 Sensor Contamination

EGR Problem

CODE 51, PROM ERROR (FAULTY OR INCORRECT PROM)

CODE 52, FAULTY CALPAK

CODE 53, SYSTEM OVERVOLTAGE

CODE 55, ECM/PCM ERROR

CODE 54, FUEL PUMP CIRCUIT

CODE P0107, MAP SENSOR CKT - 4.3L "S" & "T" SERIES PICKUP M/T

CODE P0108, MAP SENSOR CKT - 4.3L "S" & "T" SERIES PICKUP M/T

CODE P0117, COOLANT TEMP. SENS - "S" & "T" SERIES PICKUP M/T

CODE P0118, COOLANT TEMP. SENSOR - 4.3L "S" & "T" SERIES PICKUP M/T

CODE P0122, THROTTLE POS SENS - 4.3L "S" & "T" SERIES P/U M/T

CODE P0123, THROTTLE POS SENS - 4.3L "S" & "T" SERIES P/U M/T

CODE P0139, HEATED O2 SENS OPEN CKT - 4.3L "S" & "T" SERIES PICKUP M/T

CODE P0171, LEAN EXHAUST - 4.3L "S" & "T" SERIES PICKUP M/T

CODE P0172, RICH EXHAUST - 4.3L "S" & "T" SERIES PICKUP M/T

CODE P0320, IGN CNTRL ERROR - 4.3L "S/T" SERIES PICKUP - M/T

CODE P0327, KNOCK SENSOR GROUNDED - 4.3L "S/T" PICKUP - M/T

CODE P0328, KNOCK SENSOR OPEN - 4.3L "S/T" PICKUP - M/T

CODE P0400, (EGR) ERROR - 4.3L "S" & "T" SERIES PICKUP M/T

CODE P0500, VSS CIRCUIT - 4.3L "S" & "T" SERIES PICKUP M/T

CODE P1222, FUEL PUMP VLTGE LOW - 4.3L "S/T" PICKUP - M/T

SUMMARY

All sections

CODE 54, FUEL PUMP CIRCUIT Chevrolet Pickup C1500

Engine Controls - Tests W/codes - 4.3l 7 illustrations ~179 words

CODE 54, FUEL PUMP CIRCUIT

The status of fuel pump signal is monitored by the control module and is used to compensate fuel delivery based on system voltage. Signal is also used to store Code 54 if fuel pump relay is defective or if relay voltage is lost after engine is running. Voltage should be present at fuel pump signal terminal of control module the first 2 seconds after ignition is turned on and anytime reference (RPM) pulses are being received by control module.

Code 54 Schematic ("C" & "K" Series Exc. 5.0L/5.7L M/T Fuel Pump Circuit. Scheme 70

Scheme 70: Code 54 Schematic ("C" & "K" Series Exc. 5.0L/5.7L M/T Fuel Pump Circuit

Scheme 70: Code 54 Schematic ("C" & "K" Series Exc. 5.0L/5.7L M/T Fuel Pump Circuit

Code 54 Schematic ("G" Series) Fuel Pump Circuit. Scheme 71

Scheme 71: Code 54 Schematic ("G" Series) Fuel Pump Circuit

Scheme 71: Code 54 Schematic ("G" Series) Fuel Pump Circuit

Code 54 Schematic ("L" & "M" Series & "S" & "T" Series Utility Vehicles M/T Fuel Pump Circuit. Scheme 72

Scheme 72: Code 54 Schematic ("L" & "M" Series & "S" & "T" Series Utility Vehicles M/T Fuel Pump Circuit

Scheme 72: Code 54 Schematic ("L" & "M" Series & "S" & "T" Series Utility Vehicles M/T Fuel Pump Circuit

Code 54 Schematic ("P" Series A/T) Fuel Pump Circuit. Scheme 73

Scheme 73: Code 54 Schematic ("P" Series A/T) Fuel Pump Circuit

Scheme 73: Code 54 Schematic ("P" Series A/T) Fuel Pump Circuit

Code 54 Schematic ("P" Series M/T) Fuel Pump Circuit. Scheme 74

Scheme 74: Code 54 Schematic ("P" Series M/T) Fuel Pump Circuit

Scheme 74: Code 54 Schematic ("P" Series M/T) Fuel Pump Circuit

Code 54 Schematic ("S" & "T" Series Pickup A/T) Fuel Pump Circuit. Scheme 75

Scheme 75: Code 54 Schematic ("S" & "T" Series Pickup A/T) Fuel Pump Circuit

Scheme 75: Code 54 Schematic ("S" & "T" Series Pickup A/T) Fuel Pump Circuit

Code 54 Flow Chart Fuel Pump Circuit. Scheme 76

Scheme 76: Code 54 Flow Chart Fuel Pump Circuit

Scheme 76: Code 54 Flow Chart Fuel Pump Circuit