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.
SYS.OK|MANUAL.DB● LIVE
HOMESERVICE MANUALSHYUNDAI1991SONATA V6-3.0LREPAIR AND DIAGNOSISPOWERTRAIN MANAGEMENTCOMPUTERS AND CONTROL SYSTEMSDESCRIPTION AND OPERATION
1991 Hyundai Sonata V6-3.0L
Computers and Control Systems: Description and Operation
1991 Hyundai Sonata V6-3.0LSECTION Description and Operation
ECU System:
Based on the information from the input sensors, the ECU determines the optimum control for the operating conditions and drives the output actuators accordingly. The ECU consists of an 8-bit microprocessor, random access memory (RAM), read only memory (ROM) and Input/Output (I/0) interface. The ECU actively controls the operation of the Fuel Injection system, the Ignition timing, and has full control of the Idle Speed Control system. Additionally the ECU interrupts the operation of the Air Conditioning and EGR systems under some conditions, and controls the power to the Fuel Pump. Each of these systems is covered in detail in COMPONENT OPERATION along with the input sensors used to supply the operating conditions to the ECU.
RENDER: 1.0x
NO RELATED
Recommended Tools & Savings
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Affiliate disclosure: We may earn a commission at no extra cost to you.
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.