System Description
SYSTEM DIAGRAM
| Components | Function |
|---|---|
| Crankshaft position sensor 1 | Crankshaft Position Sensor 1 |
| Engine coolant temperature sensor | Engine Coolant Temperature Sensor |
| Exhaust camshaft position sensor | Exhaust Camshaft Position Sensor |
| Mass air flow sensor (With intake air temperature sensor) | Mass Air Flow Sensor (With Intake Air Temperature Sensor) |
| Intake air temperature sensor | Mass Air Flow Sensor (With Intake Air Temperature Sensor) |
| Accelerator pedal position sensor | Accelerator Pedal Position Sensor |
| Ignition switch | ECM receives the ignition start signal and OFF signal. |
| Combination meter | ECM receives the vehicle speed signal via CAN communication. |
| A/C auto amp. | ECM receives below signal via CAN communication.
|
| ECM | ECM (With Barometric Pressure Sensor) |
| Electric throttle control actuator | Electric Throttle Control Actuator |
SYSTEM DESCRIPTION
ECM calculates the value of signal transmitted from the accelerator pedal and activates the throttle valve by transmitting a control signal to the electric throttle control actuator. This allows the optimum throttle angle and improves driveability and fuel consumption. In addition, ECM learns the fully closed position every time when the ignition switch is turned OFF to improve the accuracy in throttle valve position. When a malfunction occurs in the throttle control system, the throttle valve is closed by the return spring and maintains the minimum engine speed by holding a slightly opened condition which is close to the fully opened condition. This allows the securing of brake system, power steering system, and electric system and the ensuring of the safety.