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.
Output Signals
The ECU processes information from the input sensors and sends appropriate voltage control signals to the following engine controls:
- A/C Clutch - See MISCELLANEOUS CONTROLS.
- Check Engine Light - See SELF DIAGNOSTIC SYSTEM
- EGR Control Solenoid Valve - See EMISSION SYSTEMS.
- Fuel Injectors - See FUEL SYSTEM.
- Fuel Pump Relay - See FUEL SYSTEM.
- Idle Speed Control Servo - See FUEL SYSTEM.
- Power Transistor - See IGNITION SYSTEM.
- Purge Control Solenoid - See EMISSION SYSTEM.
- Self-Diagnostics - See SELF DIAGNOSTIC SYSTEM.
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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