ЗАПУСК И ОСТАНОВ

FUNCTION OF MAIN COMPONENTS

Component		Function
Engine Stop and Start ECU		Sends either an engine stop or restart signal to the ECM according to the signals from each sensor and switch.
Engine Stop and Start ECU (Backup Boost Converter)		Supplies battery voltage to help make up for the voltage drop that occurs when the engine is restarted, preventing the operation of various systems from being interrupted due to low battery voltage.
Clutch Upper Switch (Clutch Start Switch Assembly)		Recognizes that the clutch pedal is not depressed and sends a signal to the engine stop and start ECU.
Clutch Lower Switch (Clutch Start Switch Assembly)		Recognizes that the clutch pedal is depressed and sends a signal to the engine stop and start ECU.
Neutral Position Switch		Recognizes that the shift lever is in N and sends a signal to the engine stop and start ECU.
Brake Vacuum Pressure Sensor		Detects the brake booster vacuum pressure and sends a signal to the engine stop and start ECU.
Hood Lock Assembly (Engine Hood Courtesy Switch)		Detects whether the hood is open or closed and sends a signal to the engine stop and start ECU.
Front Door Courtesy Light Switch Assembly (Driver)		Detects whether the driver door is open or closed and sends a signal to the engine stop and start ECU via the main body ECU (multiplex network body ECU) via CAN communication.
Front Seat Inner Belt Assembly (Driver) (Front Seat Belt Buckle Switch (Driver))		Detects whether or not the driver's seat belt has been fastened, and sends a signal to the engine stop and start ECU via the main body ECU (multiplex network body ECU) via CAN communication.
Air Conditioning Amplifier Assembly*		Sends an outside temperature signal and an engine restart signal to the engine stop and start ECU.
Blower Switch		Sends a blower operation signal to the engine stop and start ECU.
Combination Meter Assembly	Stop and Start Indicator Light	Turns on when the engine is stopped due to stop and start system control. Inform the driver by sounding the buzzer and blinking the stop and start indicator, of the shift lever being in any position other than N without the clutch pedal depressed. (Changing the shift lever to N will stop sounding the buzzer and flushing the indicator light.)
	Stop and Start Cancel Indicator Light	Turns on to inform the driver that the system has been disabled when stop and start system operation is prohibited by the stop and start system cancel switch assembly. If a system malfunction occers and operation frequency of the starter assembly is over the threshold, the stop and start cancel indicator light blinks to inform the driver.
	Multi-information Display	Displays the current idling stop time, the idling stop time since the ignition switch was turned from ON to off, and the total idling stop time since the last time the idling stop was reset. Displays the settings of the stop and start system or warning information, etc.
Ecorun Cancel Switch Assembly		Operation of the system can be canceled by pressing the ecorun cancel switch assembly. Pressing the switch again or turning the power source off and back on restores the operation of the system.
ECM		Sends various information about engine conditions to the engine stop and start ECU.
Brake Actuator Assembly (Skid Control ECU)		Sends a vehicle speed signal to the engine stop and start ECU.
Airbag Sensor Assembly		Sends airbag deployment information in the event of a collision and a deceleration signal to the engine stop and start ECU.
Main Body ECU (Multiplex Network Body ECU)		Sends a front door courtesy light switch signal and front seat belt buckle switch (driver) signal to the engine stop and start ECU.
Power Steering ECU Assembly		Sends an electrical power steering assist signal to the engine stop and start ECU.
Generator Assembly		Sends the generator assembly generation condition to the engine stop and start ECU via the ECM.

*: Models with air conditioning system

SYSTEM CONTROL

Operating Conditions at Engine Stop and Restart

The engine may stop if all of these conditions are detected.

Item		Operating Condition
Idle Stop	Engine Coolant Temperature	40°C to 105°C (104°F to 221°F)
	Outside Temperature	-5°C (23°F) or more
	Driver Door	Closed
	Brake Booster Vacuum	Sufficient brake booster vacuum
	Ecorun Cancel Switch Assembly	Off condition
	Vehicle Speed	0 km/h (0 mph)
	Clutch Pedal	Released
	Shift Lever Position	Neutral
	Engine Hood	Closed
	Battery Voltage	Minimum input voltage to the starter is 7.6 V or more, and minimum voltage is 8.14 V or more at cranking after going into the starter
	Battery Temperature	-10°C to 70°C (14°F to 158°F)
	Battery Integrated Current*1	When first starting the engine, battery integrated current value is -5299 A-sec or more. After the integrated current value has increased to -5299 A-sec or more at least once after the ignition switch is turned to ON: -5299 A-sec or more: Battery temperature is inside the threshold range.2 0 A-sec or more: Battery temperature is outside the threshold range.2
	Air Conditioning*3	The cooling, heating and defrost functions are not operating.
	Steering Operation	Not operated
	Engine Speed	1250 r/min or less
	Driver's Seat Belt	3 seconds or more elapse after the seat belt is fastened.
	Accelerator Pedal	Not depressed

*1: Regarding Battery Integrated Current

In the stop and start system, the engine stop and start ECU switches the system control mode (stop and start system control permitted/prohibited) based on the battery condition (charge/discharge condition) to protect the battery and to ensure stable engine restarting performance.

The battery charge-discharge condition is determined from the integrated current value calculated from the battery current sensor signal. The integrated current value is obtained by multiplying the current (ampere) detected by the battery current sensor by the time (seconds), and it is expressed in the unit A-sec. This can be measured by the Global TechStream (GTS).

The engine stop and start ECU determines the power charge based on the integrated current value and prohibits stop and start system control if the value is below the threshold, because the battery might not be able to start the engine. The threshold varies according to the battery temperature and battery charge condition.

*2: After the integrated current value becomes -6451 A-sec or less or -1152 A-sec or less, respectively, in order to charge the battery, control is prohibited until the value becomes -5299 A-sec or more or 0 A-sec or more, respectively.

*3: Models with air conditioning system

The engine will restart if any of these conditions are detected.

Item		Operating Condition
Engine Restart	Brake Booster Vacuum	Insufficient brake booster vacuum
	Air Conditioning*1/Heater	When the air conditioning is on and a timer in the air conditioning amplifier assembly completes.1 The A/C switch1, blower switch, rear window defogger switch or mirror heater switch*2 is turned on. Evaporator temperature exceeds threshold (threshold varies with temperature, humidity and amount of solar radiator)
	Ecorun Cancel Switch Assembly	The ecorun cancel switch assembly is turned on.
	Heater Switch Assembly*3	The heater switch assembly is turned on.
	Battery	The battery voltage is less than 11.4 V. The battery integrated current drops to below the threshold value.
	Driver's Door	The driver's door is opened.
	Driver's Seat Belt	The driver's seat belt is unfastened.
	Vehicle Speed	A vehicle speed signal is input.
	Clutch Pedal	The clutch pedal is depressed.
	DPF Warning Indicator Light	Illuminates.
	Steering Operation	The steering wheel is operated.

*1: Models with air conditioning system

*2: Models with mirror heater system

*3: Models with combustion type power heater

System Prohibit Control

For safety, battery protection, comfort and ECU learning reasons, the engine stop and start ECU prohibits stop and start system operation if any one of the following conditions is met.

Prohibition Reason	Condition
Safety	If the engine is started with the hood open, such as when jump starting, engine restart operation cannot be ensured. Therefore, stop and start system operation will be prohibited. Operation of the system will be restored on the next trip.
	If the driver door or hood is opened before the engine stops, stop and start system operation will be prohibited.
	The brake booster vacuum is insufficient.
	The driver seat belt is unfastened before the engine stops.
	The engine catalyst is being quickly warmed up.
Battery Protection	If the electrical load is high and the engine is stopped for a long period of time, stop and start system operation will be prohibited.
	A refresh charge is performed every time the vehicle is driven for a total of 20 hours. During the refresh charge, which takes 30 minutes to 1 hour, stop and start system operation will be prohibited.
	If the idle stop rate becomes higher than a predetermined value, stop and start system operation will be disabled.
	If the battery voltage becomes low and the battery integrated current value drops to below the threshold value, stop and start operation will be disabled.
Comfort	If the air conditioning is on when the outside temperature is high and the evaporator temperature is high, stop and start system operation will be prohibited.*1
	If the air conditioning is on when the outside temperature is low, stop and start system operation will be prohibited.*1
	If the heater is on when the outside temperature is low and the engine coolant temperature is low, stop and start system operation will be prohibited.
	If the front DEF switch and blower switch are on, stop and start system operation will be prohibited.
	If the heater switch assembly*2 is turned on, stop and start system operation will be prohibited.
Engine Protection	DPF regeneration is prior to stop and start operation during DPF regeneration.

*1: Models with air conditioning system

*2: Models with combustion type power heater

Warning Control

If any of the following operations are performed while the engine is stopped due to system control, the system will not restart the engine. The driver will be warned by a buzzer, or the engine will be regarded as stalled or will be restarted.

Operation	Warning Control
Driver door is opened.	The engine status changes to 'stalled' or is restarted.
Hood is opened.	The engine status changes to 'stalled' or is restarted.
Shift lever is moved without depressing the clutch pedal.	Buzzer sounds.
The driver seat belt is released.	The engine changes to restarted.

FUNCTION

Settings of Stop and Start System
1. Using the steering pad switch assembly and the multi-information display on the combination meter assembly, the engine stop operation time due to stop and start control when the air conditioning system is on can be changed between Normal and Extended (the stop and start system has priority).

DIAGNOSIS

When the engine stop and start ECU detects a malfunction and CAN communication is normal, the engine stop and start ECU records information related to the malfunction. Furthermore, the stop and start indicator light in the combination meter assembly blinks to inform the driver that CAN communication is normal.
The engine stop and start ECU also stores Diagnostic Trouble Code (DTCs) related to malfunctions. DTCs can be read using the Global TechStream (GTS).