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 MANUALSTOYOTA1984CELICA GT-S, 2D CONVERTIBLE, AUTOMATICREPAIR AND DIAGNOSISENGINE PERFORMANCESYSTEMECS ENGINE CONTROL SYSTEM
1984 Toyota Celica GT-S, 2D Convertible, Automatic
ECS Engine Control System
1984 Toyota Celica GT-S, 2D Convertible, AutomaticSECTION ECS Engine Control System
- Description
- Operation
- Diagnosis & Testing
- Diagnostic Circuit Check
- Trouble Codes 2 & 3 - Air Flow Meter & Circuit
- Trouble Code 4 - Coolant Temp. Sensor & Circuit
- Trouble Code 5 - Oxygen Sensor & Circuit
- Trouble Code 6 - Ignition Signal
- Trouble Code 7 - Throttle Position Sensor & Circuit
- EFI Circuit Check
- "Check Engine" Lamp Circuit Check
- Injector Circuits Check
- Brake Light Switch Check
- ECS Voltage & Resistance Specifications
- Component Testing
- Adjustments
- Wiring Diagram
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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.