Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSFORD1997EXPLORER 4D UTILITY, 4.0 E, 4WDREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT VARIANT/TRIMSECTION 3 (ENGINE CONTROLS - THEORY & OPERATION - 5.0L)
1997 Ford Explorer 4D Utility, 4.0 E, 4WD
Section 3 (Engine Controls - Theory & Operation - 5.0L)
1997 Ford Explorer 4D Utility, 4.0 E, 4WDSECTION Section 3 (Engine Controls - Theory & Operation - 5.0L)
WARNING: This page is about a different variant/trim than selected.
- Introduction
- Computerized Engine Controls
- Engine Controls - Theory & Operation - 5.0L
- Input Devices
- Notes
- Brake On/Off (BOO) Switch
- Camshaft Position (CMP) Sensor
- Clutch Pedal Position (CPP) Switch
- Coolant Temperature Sensor
- Crankshaft Position (CKP) Sensor
- Cylinder Head Temperature (CHT) Sensor
- Data Link Connector (DLC)
- Differential Pressure Feedback EGR (DPFE) Sensor
- Electronic Vacuum Regulator (EVR) Solenoid
- Engine Coolant Temperature (ECT) Sensor
- Engine RPM / Vehicle Speed Limiter System
- Fan Monitor (FANM)
- Flexible Fuel (FF) Sensor
- Fuel Pump Monitor (FPM)
- Heated Oxygen Sensor (HO2S)
- Mass Airflow (MAF) Sensor
- Octane Adjust Shorting Bar
- Output Shaft Speed (OSS) Sensor
- Park/Neutral Position (PNP) Switch
- Power Steering Pressure (PSP) Switch
- Power Take-Off (PTO) Switch
- Throttle Position (TP) Sensor
- Transmission Control Switch (TCS)
- Transmission Fluid Temperature (TFT) Sensor
- Vehicle Speed Sensor (VSS)
- Output Signals
- Notes
- A/C Cycle Switch (ACCS)
- A/C Pressure Sensor
- A/C Pressure Switch (ACPSW)
- By-Pass Air (BPA) Valve
- Canister Purge (CANP) Solenoid Valve
- Canister Purge Solenoid Valve
- EGR System
- Fuel Injectors
- Fuel Pump
- Fuel Pressure Regulator
- Idle Air Control (IAC) Valve
- Inertia Fuel Shutoff (IFS) Switch
- Malfunction Indicator Light (MIL)
- Transmission Solenoids
- Fuel System
- Ignition System
- Emission Systems
- Self-Diagnostic System
- Miscellaneous Controls
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.