STOP AND START SYSTEM SYSTEM DESCRIPTION

  1. STOP AND START CONTROL

    The stop and start system operates according to the following conditions, achieving appropriate engine stop and start control together with safe and smooth driving characteristics.

    1. When all of the conditions in the following table have been met, the engine is stopped by stop and start control.

      Item

      Condition

      (All of the following conditions are met)

      Idle Stop

      Ignition Switch

      5 seconds or more have passed with the ignition switch ON

      Engine Coolant Temperature

      40 to 105°C (104 to 221°F)

      Ambient Temperature

      Higher than -6°C (21.2 °F)

      Driver Door

      Closed

      Driver Seat Belt

      Fastened

      Brake Booster Vacuum

      Sufficient

      Shift Position

      Shift lever in neutral

      Stop and Start System Cancel Switch

      Off (system control is not prohibited)

      Vehicle Speed

      0 km/h (0 mph) (After the engine warms up)

      Engine Speed

      1250 rpm or less

      Hood

      Closed

      Battery Voltage

      After starter operation, Min Volt (After Cranking) is 8.5 V or more, and Min Voltage (Cranking) is 8.5 V or more.

      Battery Temperature*1

      -10 to 70°C (14 to 158°F)

      Battery Integrated Current*2

      1. 0 A-sec or higher: After engine started by ignition switch operation

      2. Integrated current value has increased to 0 A-sec or higher at least once after ignition switch ON:

        Tip:

        Engine is stopped until the following conditions are not met:

        • -4838 A-sec or higher: When Status of Battery Charge Control*3 are Charge Control Coordination Mode or Low Temperature Mode

        • -864 A-sec or higher: When Status of Battery Charge Control*3 are Stop and Start Standalone Mode, Stop and Start Restriction Mode or Temperature High/Low Mode

      Air Conditioning

      Other than when stop and start control is prohibited

      Heater

      One of the following conditions is met:

      • Blower switch off

      • Blower switch on when ambient temperature is 11°C (51.8°F) or higher or engine coolant temperature is 46°C (114.8°F) or higher

      • 0 to 20 seconds after the engine is restarted by stop and start control, and the air conditioning switch is off, or the blower switch is off.
      Tip:

      • *1: When the battery temperature is -15°C (5°F) or lower, or 75°C (167°F) or higher, stop and start control is prohibited. When the battery temperature returns to -10°C (14°F) or higher, or 70°C (158°F) or lower, stop and start control is permitted.

      • *2: Read the Data List item "Integrated Current" or "Oper Permission (Integrated Current)" when checking the integrated current value

        Click here

      • *3: Read the Data List item "Status of Battery Charge Control" when checking the battery charge control.

        Click here

    2. When the engine is stopped by stop and start control, and any of the following conditions are met, the engine will restart.

      Item

      Condition

      (Any of the following conditions is met)

      Engine Restart

      Brake Booster Vacuum

      Brake booster vacuum insufficient

      Air Conditioning

      Timer in the air conditioning control assembly runs out

      Heater

      Timer in the air conditioning control assembly runs out

      Air Conditioning/Heater

      • A/C switch, blower switch: ON

      • Defogger switch: ON

      • Blower switch turned off during auto control or blower mode changed to manual

      • Pollen mode switch: ON

      Battery

      Battery performance or voltage drops

      Vehicle Speed

      Vehicle speed signal is input

      Driver Door

      Open

      Driver Seat Belt

      Driver seat belt is unfastened

      Stop and Start System Cancel Switch

      Stop and start system cancel switch (ecorun cancel switch assembly (w/o Pre-crash Safety System) or combination switch assembly (w/ Pre-crash Safety System)) is turned from off to on

  2. SYSTEM PROHIBITION CONTROL

    The engine stop and start ECU prohibits stop and start control by the stop and start system according to the table below. The prohibition conditions are specified for each system.

    System

    Prohibition Condition

    Vehicle State

    Restoration Condition

    Prohibition Condition Check Timing

    Engine

    Engine coolant temperature less than 40°C (104°F)

    Engine has not warmed up

    Engine coolant temperature between 40 and 105°C (104°F to 221°F)

    Always

    Idle speed learning has not completed

    Stop and start control prohibited until idle speed learning completes

    Idle speed learning has completed

    Always

    Brake

    Brake booster vacuum decreases

    Brake booster vacuum decreases due to pumping the brakes, etc.

    Normal brake booster vacuum is reached

    Every time the vehicle stops

    Air Conditioning

    Heater:

    All of the following conditions are met:

    • Blower switch on

    • Ambient temperature 10°C (50°F) or lower

    • Coolant temperature lower than 45°C (113°F)

    Heater performance decreases

    • Coolant temperature is 45°C (113°F) or higher

    • Blower switch off

    While the heater is on

    Cooling function:

    All of the following conditions are met:

    • Blower switch on

    • Air conditioning switch on

    • Ambient temperature 25°C (77°F) or higher

    • Evaporator temperature 9°C (48.2°F) or higher

    Cooling performance decreases

    Any of the following conditions have been met:

    • Evaporator temperature is 9°C (48.2°F) or lower

    • Blower switch off

    • Air conditioning switch off

    While the air conditioning system (cooling function) is on

    Defogger:

    All of the following conditions have been met:

    1. Blower switch on

    2. 0 to 20 seconds after engine restarted by stop and start control when ambient temperature -7°C (19.4°F) or higher and the blower switch and air conditioning switch on

    1. Fogging of windows

    2. Air conditioning performance decreases

    3. Odor from air vents

    1. Blower switch off

    2. 0 to 20 seconds have passed after engine restarted by stop and start control, or the air conditioning switch or blower switch is turned off

    While the air conditioning system (cooling function for defogger) is on

    Driver Door

    Driver door opened before engine stop by engine stop and start control

    Driver door courtesy switch ON signal input

    Driver door is closed

    Always

    Engine Hood

    Engine hood opened before engine stop by stop and start control

    Engine hood switch OFF signal input

    Engine hood is closed

    Always

    Seat Belt

    Driver seat belt not fastened before engine stop by engine stop and start control

    Driver seat belt buckle switch OFF signal input

    Driver seat belt is fastened

    Always

    Ambient Temperature

    Ambient temperature -6°C (21.2°F) or lower

    -

    Ambient temperature -5°C (23°F) or higher

    Always

    Power Source

    After starter operation, Min Volt (After Cranking) is less than 8.5 V, and Min Voltage (Cranking) is less than 8.5 V.

    Battery charge insufficient or battery has deteriorated

    Battery charged or replaced

    Every time the engine started

    Battery temperature -15°C (5°F) or lower or 75°C (167°F) or higher

    (At low temperatures: Engine restarting is not assured

    At high temperatures: For battery protection)

    Depends on Ambient temperature

    An appropriate battery temperature is reached (-10 to 70 °C (14 to 158 °F))

    Always

    Battery integrated current* value is:

    1. Less than 0 A-sec: After engine start by ignition switch operation

    2. Either of following integrated current conditions met:

      • -4838 A-sec or less: When Status of Battery Charge Control*2 are Charge Control Coordination Mode or Low Temperature Mode

      • -864 A-sec or less: When Status of Battery Charge Control*2 are Stop and Start Standalone Mode, Stop and Start Restriction Mode or Temperature High/Low Mode

    • Heavy electrical load

    • High stop and start rate (Time that engine stopped by stop and start control is long)

    Battery integrated current* value more than a certain level.

    1. 0 A-sec or higher: After engine start by ignition switch operation

    2. Either of the following integrated current conditions is met:

      • -3974 A-sec or higher: When Status of Battery Charge Control*2 are Charge Control Coordination Mode or Low Temperature Mode

      • 0 A-sec or higher: When Status of Battery Charge Control*2 are Stop and Start Standalone Mode, Stop and Start Restriction Mode or Temperature High/Low Mode

    Always

    During refresh charge

    • Cable reconnected to negative (-) battery terminal

    • Conducted every 20 hours driving time

    Passage of 1 hour from 30 minutes

    Always

    Idling stop rate 40% or higher

    -

    With the ignition switch is turned off, ignition switch is turned ON again after the vehicle hood has been closed

    Always

    Engine started with the engine hood open (for jump starting)

    -

    With the ignition switch is turned off, ignition switch is turned ON again after the vehicle hood has been closed

    Every time the engine started
    Tip:

    • *1: Read the Data List item "Integrated Current" or "Oper Permission (Integrated Current)" when checking the integrated current value

      Click here

    • *2: Read the Data List item "Status of Battery Charge Control" when checking the battery charge control.

      Click here

    • If the cable is disconnected from the negative (-) battery terminal, stop and start control is prohibited until refresh charge is completed. After connecting the cable, drive the vehicle until refresh charge is completed and stop and start control is permitted (approximately 15 to 40 minutes).

    • Allow the engine to idle for 3 minutes after it is warmed up and check that the engine idle speed is within 50 rpm of the target idle speed.

  3. WARNING CONTROL

    If any of the following operations are performed while the engine is stopped due to stop and start control, the system will not restart the engine. The engine will change the mode from "stopped due to system control" to "stalled" or the driver will be warned using the buzzer.

    Operation

    Warning Control

    The driver door is opened while the shift lever is in neutral

    The engine starts

    The driver seat belt is unfastened

    The engine starts

    The engine hood opened

    The engine changes to "stalled"

    The shift lever is operated without depressing the clutch pedal

    The buzzer sounds and stop and start indicator light blinks (engine will not start)

  4. WARNING INDICATOR AND BUZZER OPERATION

    The driver is informed of the system control status and warnings by the stop and start indicator light, stop and start cancel indicator light and the buzzer.

    Table 1. Stop and Start Indicator and Buzzer Operation

    Item

    Condition

    Stop and start indicator light

    (Green)

    Stop and start cancel indicator light

    (Orange)

    Buzzer

    For 3 seconds after the ignition switch to ON

    Normal operation

    Comes on

    Comes on

    Does not sound

    During stop and start control operation (engine is stopped)

    Normal operation

    Comes on

    Does not come on

    Does not sound

    The shift lever is operated without depressing the clutch pedal

    Blinks at 0.15 second interval

    Does not come on

    Sounds

    Control is prohibited by the stop and start system cancel switch

    Normal operation

    Does not come on

    Comes on

    Does not sound

    Diagnostic trouble code

    Any DTCs are stored

    Does not come on

    Blinks at 0.5 second interval

    Does not sound

    Starter life

    Number of times the starter has been operated exceeds its limit

    Does not come on

    Blinks at 0.5 second interval

    Does not sound
    A287227C01

    *a

    Stop and Start Indicator Light

    (Green)

    *b

    Stop and Start Cancel Indicator Light

    (Orange)

  5. STOP AND START SYSTEM OPERATION

    Depending on the type of malfunction, stop and start control may be prohibited by the fail-safe function. The following table shows effects on the vehicle and areas to be inspected when there is a malfunctions in the stop and start system.

    Malfunctioning Area

    Malfunction

    DTC Output

    Data List / Freeze Frame Data

    Effect on Vehicle

    Area to be Inspected

    IGSW circuit

    Open

    P2531

    • IG Switch

    • IG SW Abnoml

    Stop and start control prohibited

    Wire harness or connector

    +B circuit

    Open

    -

    Data List cannot be checked because power not supplied to the engine stop and start ECU

    Stop and start control prohibited

    Wire harness or connector

    TMN (neutral position switch) circuit

    Stuck on

    P1780

    • Neutral Switch

    • N position Switch

    • N Position Voltage Status

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • Wire harness or connector

    • Neutral position switch

    Stuck off

    P1780

    • Neutral Switch

    • N position Switch

    • N Position Voltage Status

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    CLL (clutch start switch assembly (for lower)) circuit

    Stuck on

    P1862

    • Clutch Lower SW

    • Clutch SW Signal Abnoml

    • N/Clutch Lower SW Abnoml

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • Wire harness or connector

    • Clutch start switch assembly (for lower)

    • Clutch start switch assembly (for upper)

    Stuck off

    -

    • Clutch Lower SW

    • N/Clutch Lower SW Abnoml

    Stop and start control prohibited

    CLU (clutch start switch assembly (for upper)) circuit

    Stuck on

    P1862

    • Clutch Upper SW

    • Clutch SW Signal Abnoml

    • N/Clutch Upper SW Abnoml

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    Stuck off

    -

    • Clutch Upper SW

    • N/Clutch Upper SW Abnoml

    Stop and start control prohibited

    BNT1 (hood lock switch) circuit

    Stuck on

    -

    Hood Courtesy Switch

    The engine does not stall when the engine hood is opened with the shift lever in neutral while the engine is stopped by stop and start control

    • Wire harness or connector

    • Hood lock switch assembly

    Stuck off

    -

    Hood Courtesy Switch

    Stop and start control prohibited despite engine hood being closed

    Vacuum sensor circuit

    Remains at intermediate value

    P1541

    • Brk Boost Sen Abnoml 1

    • Brk Boost Sen Abnoml 2

    • Brk Boost Sen Abnoml 3

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • Vacuum sensor assembly

    • Brake booster assembly

    • Check valve to connector tube hose

    ECAN (stop and start system cancel switch) circuit

    Stuck on

    -

    Cancel Switch

    Stop and start control prohibited

    • Wire harness or connector

    • Stop and start system cancel switch (ecorun cancel switch assembly (w/o Pre-crash Safety System) or combination switch assembly (w/ Pre-crash Safety System))

    Stuck off

    -

    Cancel Switch

    Stop and start control cannot be canceled by pressing the stop and start system cancel switch (ecorun cancel switch assembly (w/o Pre-crash Safety System) or combination switch assembly (w/ Pre-crash Safety System))

    ABON/DEON (air conditioning control assembly) circuit*

    Open

    -

    • A/C & Blower & Defroster SW

    • A/C & Blower SW

    Stop and start control prohibited

    • Wire harness or connector

    • Air conditioning control assembly

    • Engine stop and start ECU

    Shorted

    -

    • A/C & Blower & Defroster SW

    • A/C & Blower SW

    Stop and start control prohibited

    STA circuit

    Over-current

    P0617

    • Starter Relay Overcurrent

    • Starter Circuit Abnoml

    • Starter Circuit Open

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • BBC fuse

    • Wire harness or connector

    • ST relay

    • Engine stop and start ECU

    Stuck on

    P1644

    • Wire harness or connector

    • ST relay

    • Engine stop and start ECU

    Stuck off

    P1644

    BBC (backup boost converter) circuit

    Over-current

    B22C0

    • State of BBC

    • BBC Abnoml

    • BBC Overcurrent

    • BBC Check Result

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • BBC fuse

    • Wire harness or connector

    • Engine stop and start ECU

    • Battery

    • ECUs and sensors connected to BO1 and IGO1

    • Open

    • Shorted

    • Internal circuit malfunction

    • Battery

    P323B

    • State of BBC

    • BBC Duty

    • BBC Thermistor

    • BBC Abnoml

    • BBC Over Heat

    • BBC Power Low

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • BBC fuse

    • Wire harness or connector

    • Engine stop and start ECU

    • Battery

    VB- circuit

    Open

    P0560

    VB Voltage Low

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • Wire harness or connector

    • Engine stop and start ECU

    ECU inner circuit

    Malfunction

    P0607

    -

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    Engine stop and start ECU

    Monitoring CPU circuit

    Malfunction

    P060A

    State of BBC

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    Engine stop and start ECU

    EEPROM

    Malfunction

    P062F

    EEPROM

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    Engine stop and start ECU

    Sensor power source circuit

    Malfunction

    P0641

    State of BBC

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    Engine stop and start ECU

    • *: except Automatic Air Conditioning System

    Table 2. Effects on Vehicle due to Related System Malfunctions

    Malfunctioning Area

    Malfunction

    DTC Output

    Data List / Freeze Frame Data

    Effect on Vehicle

    Area to be Inspected

    SFI system

    MIL illuminated

    DTCs for SFI system output

    Oper Permission (ECM)

    Stop and start control prohibited

    SFI system

    Abnormal NE signal

    P0335

    • NE Sensor Circuit Open 2

    • Crank Pos Sen Abnoml 3

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • SFI system (crank position sensor circuit)

    • Wire harness or connector

    Crankshaft reverse rotation detection

    P0336

    -

    • Stop and start control prohibited

    • MIL illuminated

    SFI system (crank position sensor circuit)

    Battery current sensor (generator control ECU assembly) malfunction

    P0516

    P0517

    P1550

    P1551

    P1552

    • Battery Fluid Temperature

    • Integrated Current

    Stop and start control prohibited

    Charging system

    Brake control system

    Brake control system

    -

    ABS Running

    Stop and start control prohibited

    -

    Malfunction in wheel speed sensor

    Brake control system DTCs output

    • Vehicle Sped 1 (ABS/VSC)

    • Wheel Speed Malfunction

    Stop and start control prohibited

    • Wire harness or connector

    • Skid control ECU (brake actuator assembly)

    • Vehicle speed sensor

    Power steering system

    Malfunction in power steering system

    EPS assist current value invalid

    • EPS Load

    • Comm Err with EPS

    Stop and start control prohibited

    • Power steering ECU assembly

    • Torque sensor

    Seat belt warning system

    Malfunction in seat belt warning system

    -

    Oper Permission (Driver Side Buckle SW)

    • Stop and start control prohibited (stuck off)

    • Engine does not restart when it is stopped by stop and start control (stuck on)

    • Front seat inner belt assembly (for driver side)

    • Wire harness or connector

    Driver door courtesy light switch circuit

    Malfunction in driver door courtesy light switch circuit

    -

    D Courtesy Switch

    • Stop and start control prohibited (stuck off)

    • Engine does not restart when it is stopped by stop and start control (stuck on)

    • Front door courtesy light switch assembly (for driver side)

    • Driver door courtesy light switch circuit

    Air conditioning system

    Malfunction in ambient temperature sensor

    Air conditioning system DTCs output

    Ambient Temp Sensor

    Stop and start control prohibited

    Ambient temperature sensor circuit

    Brake vacuum

    Brake booster vacuum drops

    -

    • Brake Boost Pressure

    • Brake Negative Pressure

    • Brk Boost Sen Abnoml 1

    • Brk Boost Sen Abnoml 2

    • Brk Boost Sen Abnoml 3

    Stop and start control prohibited

    • Brake booster assembly vacuum

    • Brake booster assembly

    • Vacuum sensor assembly

    • Check valve to connector tube hose

    Power source

    Backup boost converter malfunction

    P323B

    • State of BBC

    • BBC Duty

    • BBC Thermistor

    • BBC Abnoml

    • BBC Over Heat

    • BBC Power Low

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • BBC fuse

    • Wire harness or connector

    • Engine stop and start ECU

    • Battery

    Charging system malfunction

    -

    Alternator Status

    Stop and start control prohibited

    Charging system

    Low voltage

    P0562

    Battery Abnoml

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • Wire harness or connector

    • Battery

    • Relay

    Number of starter operations

    Exceeds the specified limit

    P1545

    Starter Count Abnoml

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • Starter assembly replacement is required.

    • ST relay replacement is required.

    • Fuse replacement is required.

    Starter signal malfunction

    Signal does not match with the starter switch

    P1545

    -

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • Wire harness or connector

    • Engine stop and start ECU

    Jump start

    Engine started with the engine hood open

    -

    Eng Start Reg (Engine Hood Open)

    Stop and start control prohibited

    (permitted when the ignition switch is turned off)

    • Check for history of roadside service or jump start due to dead battery

    • Engine hood courtesy switch (hood lock assembly)

    CAN communication

    Communication interrupted

    U0100

    U0121

    U0131

    U0151

    U0155*

    U0164

    -

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks*

    • Applicable wire harness or connector

    • Applicable ECU
    Tip:

    *: The stop and start cancel indicator light does not blink when a communication error with the combination meter assembly occurs.