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 MANUALSFORD1993PICKUP F250, 2D PICKUP, 5.0 N, STANDARD, M5OD-R2REPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 10 (ENGINE CONTROLS - SELF-DIAGNOSTICS - EEC-IV - GASOLINE)
1993 Ford Pickup F250, 2D Pickup, 5.0 N, Standard, M5OD-R2
Section 10 (Engine Controls - Self-Diagnostics - EEC-IV - Gasoline)
1993 Ford Pickup F250, 2D Pickup, 5.0 N, Standard, M5OD-R2SECTION Section 10 (Engine Controls - Self-Diagnostics - EEC-IV - Gasoline)
WARNING: This page is about a different car, the 1994 Ford RV Cutaway, 1994 Ford Econoline, 1994 Ford Cutaway, and 1994 Ford Club Wagon. However, it is still accessible from the selected car via links, so may be relevant.
- Model Identification
- Introduction
- Self-Diagnostic System
- Quick Test
- Additional System Functions
- Service Code Reference Charts
- Service Code Definition Charts
- Circuit Tests
- How To Use Circuit Tests
- Circuit Test Aa - No Start (Distributor Ignition Systems)
- Circuit Test B - Checking Vehicle Battery
- Circuit Test C - Reference Voltage
- Circuit Test DA - Temperature Sensor Test (ECT & IAT)
- Circuit Test Dc - Mass Airflow (MAF) Sensor
- Circuit Test DF - Map/Barometric Pressure (BARO) Sensor
- Circuit Test Dg - Knock Sensor (KS)
- Circuit Test DH - Throttle Position (TP) Sensor
- Circuit Test DL - DPFE Sensor & EGR Vac Regulator (EVR) Sol
- Circuit Test DN - EVP Sensor & EVR Solenoid
- Circuit Test DP - Vehicle Speed Sensor (VSS)
- Circuit Test DS - PSOM
- Circuit Test FD - Brake On-Off (Boo) Switch
- Circuit Test FE - Electrical Load Inputs
- Circuit Test Ff - Power Steering Pressure (PSP) Switch
- Circuit Test G - MAF/TP Sensor Fuel Injector Pulse Width Test
- Circuit Test H - Fuel Control
- Circuit Test Ha - Adaptive Fuel
- Circuit Test J - Fuel Pump Circuit (Relay & Inertia Switch)
- Circuit Test KA - EGR Vacuum Regulator (EVR) Solenoid
- Circuit Test Kb - Canister Purge (CANP) Valve
- Circuit Test Kc - Secondary Air INJ Solenoids (AIRB/AIRD)
- Circuit Test KD - Canister Purge (CANP) Solenoid
- Circuit Test KE - Idle Air Control (IAC) Solenoid
- Circuit Test Km - WAC & A/C Demand Switch
- Circuit Test KP - Octane Adjust
- Circuit Test M - Dynamic Response Test
- Circuit Test Ml - Self-Test Output (STO) Or Mil
- Circuit Test NA - IDM Distributor Ignition Systems
- Circuit Test Pa - Spark Timing Check (Distributor Ignition Systems)
- Circuit Test QA - No Codes/Codes Not Listed
- Circuit Test QB - Continuous Memory Code 15 Or 512
- Circuit Test QC - Output State Check Not Functioning
- Circuit Test S - System Check
- Circuit Test Ta - CPP Switch/PNP Switch
- Circuit Test Tb - 4X4 Low & Transmission Control Switch (TCS)
- Circuit Test TC - Transmission Solenoids
- Circuit Test TD - Manual Lever Position (MLP) Sensor
- Circuit Test Te - Transmission Fluid Temperature (TFT) Sensor
- Circuit Test TF - Output Shaft Speed (OSS) Sensor
- Circuit Test TG - Elect Trans Continuous Memory Service Codes
- Summary
- Wiring Diagrams
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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.