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 MANUALSFORD1985BRONCO 5.8 G, STANDARD, TODREPAIR AND DIAGNOSISEXTERNAL PAGESDIFFERENT CARSECTION 45 (EEC IV THEORY/OPERATION)
1985 Ford Bronco 5.8 G, Standard, TOD
Section 45 (EEC IV Theory/Operation)
1985 Ford Bronco 5.8 G, Standard, TODSECTION Section 45 (EEC IV Theory/Operation)
WARNING: This page does not describe the selected car, but rather 11 other vehicles, including the 1988 Ford Ranger, 1988 Ford RV Cutaway, 1988 Ford Pickup, 1988 Ford F-Super Duty, and 1988 Ford Econoline. However, it is still accessible from the selected car via links, so may be relevant.
- Description
- Notes
- ECA Location
- Basic System Operation
- A/C Compressor Clutch Signal
- Air Charge Temperature (Act) Sensor
- Barometric Pressure (BP) Sensor
- Brake On/Off (Boo) Switch
- Knock Sensor (KS)
- EEC Power Relay
- EGR Valve Position (EVP) Sensor
- Engine Coolant Temperature (ECT) Sensor
- Idle Tracking Switch (Its)
- Manifold Absolute Pressure (Map) Sensor
- Neutral Drive Switch (NDS) & Neutral Gear Switch (NGS)
- Heated Oxygen (HEGO) Sensor
- Profile Ignition Pick-Up (Pip)
- Power Steering Pressure Switch (PSPS)
- Pressure Feedback Electronic (PFE) EGR Valve
- Self-Test Input (STI)
- Throttle Position (TP) Sensor
- A/C Cooling Fan Controller & Wide Open Throttle A/C (WAC) Cut-Off
- Canister Purge Solenoid (CANP)
- EGR Control (EGRC) Solenoid (2.3L OHC MPFI Engine)
- EGR Vacuum Regulator (EVR)
- Fuel Injectors
- Fuel Pump Relay
- Idle Speed Control-Bypass Air
- Self-Test Output (STO)
- Shift Indicator Light (SIL)
- Spark Output (Spout)
- THERMACTOR Air By-Pass (Tab) Solenoid
- THERMACTOR Air Diverter (Tad) Solenoid
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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.