PCM [SKYACTIV-D 1.5]

Function	Description
Main relay control	• Supplies power to each part by switching the main relay on/off at the optimal timing according to the vehicle conditions.
Idle speed control	• The PCM controls the fuel injection amount so that the target idle speed according to the engine operation conditions is obtained.
Boost control	• The PCM controls the air charging pressure to improve the variable geometry turbocharger responsiveness, the acceleration performance and fuel economy of the vehicle. • To obtain optimum air charging pressure according to the driving conditions, the PCM drives and controls the turbocharger solenoid valve.
Fuel injection amount control	• The fuel injection amount is controlled by the opening of the nozzle in the fuel injector based on the signal from the PCM. • The PCM learns and corrects the variation in the fuel injection amount of each cylinder.
Multiple fuel injection control	• Multiple fuel injection control has been adopted in which the number of fuel injections is divided over several times for the purpose of noise and NOx reduction. ― For single injection, a greater amount of fuel is consumed to inject the necessary amount of fuel at one time. For this reason, the fuel is combusted rapidly at a high temperature and high pressure, resulting in increased noise and NOx. ― In multiple injection, combustion is performed more slowly to divide the necessary fuel amount over several times, thus controlling noise and the occurrence of NOx.
Fuel injection timing control	• The PCM determines and controls the optimum fuel injection timing according to engine operation conditions based on the signals from each input sensor.
Fuel pressure control	• The PCM performs feedback control of the fuel pressure in the common rail to gain optimum fuel injection pressure according to engine operation conditions. • Because the fuel pressure can be controlled regardless of the engine operation conditions, high pressure fuel injection even at low engine speeds is possible. As a result, generation of NOx and PM can be reduced.
Intake shutter valve control	• The PCM controls the intake shutter valve when the following controls are performed. ― EGR control: Due to the difficulty in generating a pressure difference between the intake and exhaust during light engine-loads, the exhaust gas recirculation is corrected by the HP-EGR by closing the intake shutter valve and pressurizing the intake manifold. ― DPF regeneration control: Intake air is reduced during DPF regeneration control to cause the exhaust gas temperature to increase more easily. ― During deceleration: Intake air is reduced so that the catalyst temperature is not lowered by the incoming outside air.
Exhaust shutter valve control	• The PCM controls the exhaust shutter valve when the following controls are performed. ― EGR control: During LP-EGR control, the exhaust shutter valve is closed, and the exhaust gas recirculation is corrected by raising the exhaust gas pressure at the LP-EGR valve inlet.
Coolant control valve control	• Depending on the engine operation conditions, the PCM controls the coolant control valve opening angle so that the appropriate amount of engine coolant can be sent to the appropriate coolant passage at the appropriate timing.
Electric water pump control	• The PCM sends a duty signal to the electric water pump according to the engine operation conditions to adjust the water-cooled charge air cooler performance.
Glow control	• Heating of the glow plug is controlled by the PCM through the glow control module to improve engine startability and DPF regeneration performance. • Energization time to the glow plug is determined according to the engine coolant temperature and engine starting conditions.
EGR control	• To recirculate an optimum amount of exhaust gas to the combustion chamber according to engine operation conditions, the PCM performs duty control of the HP-EGR control valve and LP-EGR control valve to open/closed the valve. • During EGR control, the intake air temperature increases by the recirculated exhaust gas which affects the combustion temperature. To maintain an appropriate intake air temperature, the opening angle of the HP-EGR control valve and LP-EGR control valve is controlled according to the driving environment/engine conditions. • During fast idle increase and DPF regeneration control, the HP-EGR control valve is controlled so that it does not operate to prevent the post-injected fuel from circulating to the intake side.
Air fuel ratio (A/F) sensor heater control	• By activating the A/F sensor using the A/F sensor heater, stable detection of the oxygen concentration is possible even when the exhaust gas temperature is low. • When the exhaust gas temperature is high, enerzation to the A/F sensor heater is stopped to protect the A/F sensor from a rise in temperature.
Diesel particulate filter regeneration control	• When the amount of accumulated particulate matter (PM) in the diesel particulate filter exceeds a certain value, the PCM controls to combust and eliminate PM. • Two methods are available to combust and eliminate PM, one is automatic DPF regeneration control which is performed by the PCM automatically, and the other is compulsory DPF regeneration control which can be forcibly performed externally.
A/C cut-off control	• Controls the A/C operation by switching the A/C relay on/off at the optimal timing according to engine operation conditions. By controlling the A/C operation, acceleration performance and engine reliability have been improved.
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. • The PCM determines the engine operation conditions based on the signal from each sensor and performs duty-control of the fan control module to control the rotation speed of the cooling fan motor.
Starter cut-off control	• The PCM controls energization to the starter relay according to an immobilizer system request to improve security. • While the selector lever is not in P or N position, starter relay energization using the push button start is inhibited. (ATX) • When the clutch pedal is not depressed, starter relay energization using the push button start is inhibited. (MTX)
Generator control	• Idling stability has been improved by optimum control of the generator voltage according to the engine operation and electrical load conditions. • The PCM determines the engine operation and electrical load conditions based on the input signals from each control part to control the energization time of the generator field coils.
Run dry prevention (RDP) control	• To prevent air from flowing into the fuel line when fuel in the fuel tank decreases, the output is intentionally controlled to warn the driver to supply fuel.
Blow-by heater control	• Operates the blow-by heater at an extremely low temperature to prevent freezing of the moisture in the blow-by gas in the ventilation pipe and blocking the passage. • The PCM operates the blow-by heater by switching the blow-by heater relay on/off.
i-stop control	• When the vehicle is stopped such as at a stop light, the i-stop control stops/starts the engine automatically to improve fuel economy and reduce exhaust gas and idling noise. • The PCM determines whether to permit/inhibit i-stop control based on the signal from each input part and CAN communication. • The i-stop control includes the engine stop control, engine restart control, electric AT oil pump driver control, and hill launch assist functions.
DC-DC converter control	• Stability of the power supply to the cabin has been realized by preventing decreases in the power supply due to battery voltage decreases while the engine is restarted by the i-stop control. • When the engine is restarted by the i-stop control, the PCM sends a battery voltage (DC-DC converter downstream voltage) boost request signal to the DC-DC converter.
Engine oil control	• The PCM reduces the oil pump load applied to the engine by controlling the appropriate engine hydraulic pressure according to the engine operation conditions. • The engine hydraulic pressure in two steps. When hydraulic pressure is not needed, the oil pump discharge amount is reduced by the operation of the engine oil solenoid valve.

Function

Description

Main relay control

• Supplies power to each part by switching the main relay on/off at the optimal timing according to the vehicle conditions.

Idle speed control

• The PCM controls the fuel injection amount so that the target idle speed according to the engine operation conditions is obtained.

Boost control

• The PCM controls the air charging pressure to improve the variable geometry turbocharger responsiveness, the acceleration performance and fuel economy of the vehicle.

• To obtain optimum air charging pressure according to the driving conditions, the PCM drives and controls the turbocharger solenoid valve.

Fuel injection amount control

• The fuel injection amount is controlled by the opening of the nozzle in the fuel injector based on the signal from the PCM.

• The PCM learns and corrects the variation in the fuel injection amount of each cylinder.

Multiple fuel injection control

• Multiple fuel injection control has been adopted in which the number of fuel injections is divided over several times for the purpose of noise and NOx reduction.

― For single injection, a greater amount of fuel is consumed to inject the necessary amount of fuel at one time. For this reason, the fuel is combusted rapidly at a high temperature and high pressure, resulting in increased noise and NOx.

― In multiple injection, combustion is performed more slowly to divide the necessary fuel amount over several times, thus controlling noise and the occurrence of NOx.

Fuel injection timing control

• The PCM determines and controls the optimum fuel injection timing according to engine operation conditions based on the signals from each input sensor.

Fuel pressure control

• The PCM performs feedback control of the fuel pressure in the common rail to gain optimum fuel injection pressure according to engine operation conditions.

• Because the fuel pressure can be controlled regardless of the engine operation conditions, high pressure fuel injection even at low engine speeds is possible. As a result, generation of NOx and PM can be reduced.

Intake shutter valve control

• The PCM controls the intake shutter valve when the following controls are performed.

― EGR control: Due to the difficulty in generating a pressure difference between the intake and exhaust during light engine-loads, the exhaust gas recirculation is corrected by the HP-EGR by closing the intake shutter valve and pressurizing the intake manifold.

― DPF regeneration control: Intake air is reduced during DPF regeneration control to cause the exhaust gas temperature to increase more easily.

― During deceleration: Intake air is reduced so that the catalyst temperature is not lowered by the incoming outside air.

Exhaust shutter valve control

• The PCM controls the exhaust shutter valve when the following controls are performed.

― EGR control: During LP-EGR control, the exhaust shutter valve is closed, and the exhaust gas recirculation is corrected by raising the exhaust gas pressure at the LP-EGR valve inlet.

Coolant control valve control

• Depending on the engine operation conditions, the PCM controls the coolant control valve opening angle so that the appropriate amount of engine coolant can be sent to the appropriate coolant passage at the appropriate timing.

Electric water pump control

• The PCM sends a duty signal to the electric water pump according to the engine operation conditions to adjust the water-cooled charge air cooler performance.

Glow control

• Heating of the glow plug is controlled by the PCM through the glow control module to improve engine startability and DPF regeneration performance.

• Energization time to the glow plug is determined according to the engine coolant temperature and engine starting conditions.

EGR control

• To recirculate an optimum amount of exhaust gas to the combustion chamber according to engine operation conditions, the PCM performs duty control of the HP-EGR control valve and LP-EGR control valve to open/closed the valve.

• During EGR control, the intake air temperature increases by the recirculated exhaust gas which affects the combustion temperature. To maintain an appropriate intake air temperature, the opening angle of the HP-EGR control valve and LP-EGR control valve is controlled according to the driving environment/engine conditions.

• During fast idle increase and DPF regeneration control, the HP-EGR control valve is controlled so that it does not operate to prevent the post-injected fuel from circulating to the intake side.

Air fuel ratio (A/F) sensor heater control

• By activating the A/F sensor using the A/F sensor heater, stable detection of the oxygen concentration is possible even when the exhaust gas temperature is low.

• When the exhaust gas temperature is high, enerzation to the A/F sensor heater is stopped to protect the A/F sensor from a rise in temperature.

Diesel particulate filter regeneration control

• When the amount of accumulated particulate matter (PM) in the diesel particulate filter exceeds a certain value, the PCM controls to combust and eliminate PM.

• Two methods are available to combust and eliminate PM, one is automatic DPF regeneration control which is performed by the PCM automatically, and the other is compulsory DPF regeneration control which can be forcibly performed externally.

A/C cut-off control

• Controls the A/C operation by switching the A/C relay on/off at the optimal timing according to engine operation conditions. By controlling the A/C operation, acceleration performance and engine reliability have been improved.

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.

• The PCM determines the engine operation conditions based on the signal from each sensor and performs duty-control of the fan control module to control the rotation speed of the cooling fan motor.

Starter cut-off control

• The PCM controls energization to the starter relay according to an immobilizer system request to improve security.

• While the selector lever is not in P or N position, starter relay energization using the push button start is inhibited. (ATX)

• When the clutch pedal is not depressed, starter relay energization using the push button start is inhibited. (MTX)

Generator control

• Idling stability has been improved by optimum control of the generator voltage according to the engine operation and electrical load conditions.

• The PCM determines the engine operation and electrical load conditions based on the input signals from each control part to control the energization time of the generator field coils.

Run dry prevention (RDP) control

• To prevent air from flowing into the fuel line when fuel in the fuel tank decreases, the output is intentionally controlled to warn the driver to supply fuel.

Blow-by heater control

• Operates the blow-by heater at an extremely low temperature to prevent freezing of the moisture in the blow-by gas in the ventilation pipe and blocking the passage.

• The PCM operates the blow-by heater by switching the blow-by heater relay on/off.

i-stop control

• When the vehicle is stopped such as at a stop light, the i-stop control stops/starts the engine automatically to improve fuel economy and reduce exhaust gas and idling noise.

• The PCM determines whether to permit/inhibit i-stop control based on the signal from each input part and CAN communication.

• The i-stop control includes the engine stop control, engine restart control, electric AT oil pump driver control, and hill launch assist functions.

DC-DC converter control

• Stability of the power supply to the cabin has been realized by preventing decreases in the power supply due to battery voltage decreases while the engine is restarted by the i-stop control.

• When the engine is restarted by the i-stop control, the PCM sends a battery voltage (DC-DC converter downstream voltage) boost request signal to the DC-DC converter.

Engine oil control

• The PCM reduces the oil pump load applied to the engine by controlling the appropriate engine hydraulic pressure according to the engine operation conditions.

• The engine hydraulic pressure in two steps. When hydraulic pressure is not needed, the oil pump discharge amount is reduced by the operation of the engine oil solenoid valve.

Function	Page
Main relay control	(See MAIN RELAY CONTROL [SKYACTIV-D 1.5].)
Idle speed control	(See IDLE SPEED CONTROL [SKYACTIV-D 1.5].)
Boost control	(See BOOST CONTROL [SKYACTIV-D 1.5].)
Fuel injection amount control	(See FUEL INJECTION AMOUNT CONTROL [SKYACTIV-D 1.5].)
Multiple fuel injection control	(See MULTIPLE FUEL INJECTION CONTROL [SKYACTIV-D 1.5].)
Fuel injection timing control	(See FUEL INJECTION TIMING CONTROL [SKYACTIV-D 1.5].)
Fuel pressure control	(See FUEL PRESSURE CONTROL [SKYACTIV-D 1.5].)
Intake shutter valve control	(See INTAKE SHUTTER VALVE CONTROL [SKYACTIV-D 1.5].)
Exhaust shutter valve control	(See EXHAUST SHUTTER VALVE CONTROL [SKYACTIV-D 1.5].)
Coolant control valve control	(See COOLANT CONTROL VALVE CONTROL [SKYACTIV-D 1.5].)
Electric water pump control	(See ELECTRIC WATER PUMP CONTROL [SKYACTIV-D 1.5].)
Glow control	(See GLOW CONTROL [SKYACTIV-D 1.5].)
EGR control	(See EGR CONTROL [SKYACTIV-D 1.5].)
Air fuel ratio (A/F) sensor heater control	(See AIR FUEL RATIO (A/F) SENSOR HEATER CONTROL [SKYACTIV-D 1.5].)
Diesel particulate filter regeneration control	(See DIESEL PARTICULATE FILTER REGENERATION CONTROL [SKYACTIV-D 1.5].)
A/C cut-off control	(See A/C CUT-OFF CONTROL [SKYACTIV-D 1.5].)
Electrical fan control	(See ELECTRICAL FAN CONTROL [SKYACTIV-D 1.5].)
Starter cut-off control	(See STARTER CUT-OFF CONTROL [SKYACTIV-D 1.5].)
Generator control	(See GENERATOR CONTROL [SKYACTIV-D 1.5].)
Run dry prevention (RDP) control	(See RUN DRY PREVENTION (RDP) CONTROL [SKYACTIV-D 1.5].)
Blow-by heater control	(See BLOW-BY HEATER CONTROL [SKYACTIV-D 1.5].)
i-stop control	(See i-stop CONTROL [SKYACTIV-D 1.5].)
DC-DC converter control	(See DC-DC CONVERTER CONTROL [SKYACTIV-D 1.5].)
Engine oil control	(See ENGINE OIL CONTROL [SKYACTIV-D 1.5].)

Function

Page

Main relay control

(See MAIN RELAY CONTROL [SKYACTIV-D 1.5].)

Idle speed control

(See IDLE SPEED CONTROL [SKYACTIV-D 1.5].)

Boost control

(See BOOST CONTROL [SKYACTIV-D 1.5].)

Fuel injection amount control

(See FUEL INJECTION AMOUNT CONTROL [SKYACTIV-D 1.5].)

Multiple fuel injection control

(See MULTIPLE FUEL INJECTION CONTROL [SKYACTIV-D 1.5].)

Fuel injection timing control

(See FUEL INJECTION TIMING CONTROL [SKYACTIV-D 1.5].)

Fuel pressure control

(See FUEL PRESSURE CONTROL [SKYACTIV-D 1.5].)

Intake shutter valve control

(See INTAKE SHUTTER VALVE CONTROL [SKYACTIV-D 1.5].)

Exhaust shutter valve control

(See EXHAUST SHUTTER VALVE CONTROL [SKYACTIV-D 1.5].)

Coolant control valve control

(See COOLANT CONTROL VALVE CONTROL [SKYACTIV-D 1.5].)

Electric water pump control

(See ELECTRIC WATER PUMP CONTROL [SKYACTIV-D 1.5].)

Glow control

(See GLOW CONTROL [SKYACTIV-D 1.5].)

EGR control

(See EGR CONTROL [SKYACTIV-D 1.5].)

Air fuel ratio (A/F) sensor heater control

(See AIR FUEL RATIO (A/F) SENSOR HEATER CONTROL [SKYACTIV-D 1.5].)

Diesel particulate filter regeneration control

(See DIESEL PARTICULATE FILTER REGENERATION CONTROL [SKYACTIV-D 1.5].)

A/C cut-off control

(See A/C CUT-OFF CONTROL [SKYACTIV-D 1.5].)

Electrical fan control

(See ELECTRICAL FAN CONTROL [SKYACTIV-D 1.5].)

Starter cut-off control

(See STARTER CUT-OFF CONTROL [SKYACTIV-D 1.5].)

Generator control

(See GENERATOR CONTROL [SKYACTIV-D 1.5].)

Run dry prevention (RDP) control

(See RUN DRY PREVENTION (RDP) CONTROL [SKYACTIV-D 1.5].)

Blow-by heater control

(See BLOW-BY HEATER CONTROL [SKYACTIV-D 1.5].)

i-stop control

(See i-stop CONTROL [SKYACTIV-D 1.5].)

DC-DC converter control

(See DC-DC CONVERTER CONTROL [SKYACTIV-D 1.5].)

Engine oil control

(See ENGINE OIL CONTROL [SKYACTIV-D 1.5].)

DTC No.	Fail-safe function
P0602:00	• Inhibits engine-stop by operating the i-stop function.
P0605:00	• PCM restricts engine torque. • Inhibits the EGR control. • Inhibits the auto DPF regeneration control. • Fully open the intake shutter valve. • Inhibits the compulsory DPF regeneration control. • PCM restricts engine-transaxle integration control. (ATX) • Inhibits engine-stop by operating the i-stop function.
P0606:00
P0607:00
P0610:00	• Inhibits engine-stop by operating the i-stop function.
P062B:00	• PCM restricts engine torque.
P06B8:00	• Inhibits engine-stop by operating the i-stop function.
P2507:00	• Inhibits engine-stop by operating the i-stop function.

DTC No.

Fail-safe function

P0602:00

• Inhibits engine-stop by operating the i-stop function.

P0605:00

• PCM restricts engine torque.

• Inhibits the EGR control.

• Inhibits the auto DPF regeneration control.

• Fully open the intake shutter valve.

• Inhibits the compulsory DPF regeneration control.

• PCM restricts engine-transaxle integration control. (ATX)

• Inhibits engine-stop by operating the i-stop function.

P0606:00

P0607:00

P0610:00

• Inhibits engine-stop by operating the i-stop function.

P062B:00

• PCM restricts engine torque.

P06B8:00

• Inhibits engine-stop by operating the i-stop function.

P2507:00

• Inhibits engine-stop by operating the i-stop function.