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.
1996 Toyota Tercel DX, 4D Sedan, AutomaticFACTORY OEM SERVICE PROCEDURE
Engine Controls - Theory & Operation
- Introduction
- Computerized Engine Controls
- Engine Control System
- Engine Control Module
- Input Devices
- Notes
- A/C Switch
- Battery Signal
- Camshaft & Crankshaft Position Sensors
- Engine Coolant Temperature (ECT) Sensor
- Engine Cranking Signal
- Intake Air Temperature Sensor
- Knock Sensor
- Manifold Absolute Pressure (MAP) Sensor
- Oxygen Sensor
- Park/Neutral Position (PNP) Switch (A/T Models)
- Throttle Position (TP) Sensor
- Vehicle Speed Sensor
- Output Signals
- Notes
- A/C-Cut Control System
- A/C Idle-Up System
- Circuit Opening Relay
- EGR System Vacuum Switching Valve (VSV)
- Electronically Controlled Transmission/Transaxle
- Electronic Spark Advance System
- EVAP Vacuum Switching Valve (VSV)
- Fuel Pressure Control System Vacuum Switching Valve (VSV)
- Fuel Pump
- Idle Speed Control System
- Self-Diagnostic System
- Throttle Opener Vacuum Switching Valve (VSV)
- Vapor Pressure Sensor Vacuum Switching Valve (EVAP-VPSVSV)
- Fuel System
- Ignition System
- Emission Systems
- Self-Diagnostic System
- Miscellaneous Controls
Factory Service Tools
Use the Manual With the Right Hardware
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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.
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