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 41 (EEC IV THEORY/OPERATION)
1985 Ford Bronco 5.8 G, Standard, TOD
Section 41 (EEC IV Theory/Operation)
1985 Ford Bronco 5.8 G, Standard, TODSECTION Section 41 (EEC IV Theory/Operation)
WARNING: This page does not describe the selected car, but rather 10 other vehicles, including the 1986 Ford Ranger, 1986 Ford RV Cutaway, 1986 Ford Pickup, 1986 Ford Econoline, and 1986 Ford Cutaway. However, it is still accessible from the selected car via links, so may be relevant.
- Description
- Operation
- Notes
- Inputs
- A/C Compressor Clutch (ACC) Signal
- Air Charge Temperature (ACT) Sensor (All Except 4.9L FBC)
- Brake On/Off (BOO) Switch (All Except 4.9L FBC & 5.0L EFI)
- Detonation (Knock) Sensor (All Except 4.9L FBC)
- EEC Power Relay
- EGR Valve Position Sensor (EVP) (2.8L FBC, 2.3L & 5.0L EFI)
- Engine Coolant Temperature (ECT) Sensor
- Idle Tracking Switch (ITS) (2.8L & 4.9L FBC)
- Inferred Mileage Sensor (IMS) (2.8L FBC & Calif. 5.0L EFI)
- Manifold Absolute Pressure (MAP) Sensor
- Neutral Drive Switch (NDS), Neutral Gear Switch (NGS) & Clutch Engage Switch
- Oxygen (EGO) Sensor
- Profile Ignition Pick-Up (PIP)
- Power Steering Pressure Switch (PSPS) (2.3L & 3.0L EFI)
- Pressure Feedback Electronic (PFE) EGR Valve & Transducer (2.9L)
- Self-Test Input (STI)
- Throttle Position Sensor (TPS)
- Outputs
- Canister Purge Solenoid (CANP) (3.0L EFI, 2.8L & 4.9L FBC)
- Converter Clutch Override (CCO) Solenoid (2.8L FBC, 2.3L, 2.9L & 3.0L EFI)
- EGR Control (EGRC) Solenoid (2.8L FBC, 2.3L & 5.0L EFI)
- EGR Shut-Off (EGRSO) Solenoid (4.9L FBC Engine Only)
- EGR Vent (EGRV) Solenoid (2.8L FBC, 2.3L & 5.0L EFI)
- Feedback Control (FBC) Solenoid (2.8L & 4.9L FBC)
- Fuel Injectors (All EFI)
- Fuel Pump Relay (All EFI Engines)
- Idle Speed Control (ISC) Motor (2.8L & 4.9L FBC)
- Self-Test Output (STO)
- Shift Indicator Light (SIL) (2.3L EFI, 2.8L & 4.9L FBC)
- Temperature Compensated Accelerator Pump (TCP) (2.8L FBC)
- Thermactor Air By-Pass (TAB) Solenoid (Calif. 5.0L EFI, 2.8L & 4.9L FBC)
- Thermactor Air Diverter (TAD) Solenoid (Calif. 5.0L EFI, 2.8L & 4.9L FBC)
- Thick Film Integrated (TFI) Ignition Module
- Throttle Air By-Pass Valve (All EFI Models)
- Variable Voltage Choke (VVC) Relay (2.8L FBC Only)
- Wide Open Throttle A/C (WAC) Cut-Off (2.3L, 2.9L & 3.0L EFI)
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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.