PCM FUNCTION [L8, LF]

id0140i7105300

Function List

• The control descriptions are as shown below.

Function | Description
--- | ---
Main relay control | When the ignition switch is turned to the ON position, the main relay turns on.
Drive-by-wire control | The drive-by-wire control calculates the optimum target throttle valve opening angle at all ranges of engine speeds and controls the throttle valve actuator.
Drive-by-wire relay control | Supplies power to the drive-by-wire control.
Variable intake air control | Switches energization of the variable shutter valve actuator according to engine speed to enhance the inertia charging effect.
Variable tumble control | At cold engine start, the following occur due to the closing of the variable tumble shutter valve for improved cold engine exhaust emission performance. • Improved intake airflow speed near injectors • Strong air tumble occurs in the combustion changer, promoting vaporization mixture of intake air and fuel
Variable valve timing control (LF) | Changes the intake valve timing according to engine operation conditions to improve engine output, fuel economy and exhaust emission performance.
Fuel injection control | Performs optimum fuel injection according to engine operation conditions.
Fuel pump control | Performs energization of the fuel pump relay only when the engine is running (operates fuel pump) to improve stability and durability.
ESA control | Controls ignition to optimum timing according to engine operation conditions.
Evaporative purge control | An appropriate amount of evaporative gas is fed into the dynamic chamber by the driving of the purge solenoid valve according to the engine operation conditions to ensure driveability and prevent release of fuel vapor gas into the atmosphere.
EGR control | Adjusts the EGR to the optimum opening angle according to engine operation conditions.
A/F sensor heater, HO2S heater control | Based on the control of the A/F sensor heater and HO2S heater, a stabilized oxygen concentration is detected even at low exhaust gas temperature and feedback control of fuel injection even during cold engine start is made possible for improved cold temperature emission performance.
A/C cut-off control | The current application (energize/non-energize) to the A/C relay (magnetic clutch) is controlled according to the engine operation conditions to prevent deterioration of engine performance, damage to the engine, and deterioration of the A/C function.
Electrical fan control | Through cooling of the radiator and condenser by operation of the cooling fan according to vehicle conditions, engine reliability and cooling performance have been improved.
Starter cut-off control | Theft deterrence has been improved by controlling energization to the starter relay according to an engine stop request signal from the immobilizer system.
Generator control | Generator output is optimized according to the engine operation and electrical load conditions, ensuring idling stability and anti-load performance.
CAN | The PCM sends and receives signals to and from the CAN system related modules via CAN.