STOP AND START SYSTEM(for 1AD-FTV) 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 system 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

      Within the specified temperature range (varies depending on the vehicle usage environment)

      Tip:

      • The upper limit is 105°C (221°F)

      • The lower limit is maximum 65°C (149°F)

      Atmospheric Pressure

      75 kPa (0.8 kgf/cm2, 11 psi) or higher

      Ambient Temperature

      -5°C (23°F) or higher

      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

      Engine Hood

      Closed

      Battery Voltage

      6.6 V or higher at engine start

      Battery Temperature*1

      -10 to 70°C (14 to 158°F)

      Battery Integrated Current*2

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

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

        Tip:

        The engine is stopped until the following conditions are not met:

        • -6451 A-sec or higher: The battery charge is sufficient and the battery temperature is -1°C (30.2°F) or higher and below 70°C (158°F)

        • -1152 A-sec or higher: The battery charge is insufficient or the battery temperature is below -1°C (30.2°F) or 70°C (158°F) or higher

      Air Conditioning

      Other than when stop and start control is prohibited

      Heater

      Once of the following conditions is met:

      • The blower switch is off

      • The blower switch is on when the Ambient temperature is 11°C (51.8°F) or higher or the 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 less, or 75°C (167°F) or higher, the stop and start control is prohibited. When the battery temperature returns to -10°C (14°F) or higher, or 70°C (158°F) or less, 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

    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 are met)

      Engine Restart

      Brake Booster Vacuum

      The brake booster vacuum is insufficient

      Air Conditioning

      The timer in the air conditioning amplifier assembly runs out

      Heater

      When the blower is in auto mode, the timer in the air conditioning amplifier assembly runs out. In other conditions, the timer in the engine stop and start ECU runs out

      Air Conditioning/Heater

      • A/C switch, blower switch: ON

      • Defogger switch: ON

      • The blower switch is turned off during auto control or the blower mode is 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 (combination switch assembly) is turned from off to on

      Heater Switch Assembly*

      The heater switch assembly is turned on

      *: w/ Combustion Type Power Heater System

  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.

    Item

    Prohibition Condition

    Vehicle State

    Restoration Condition

    Prohibition Condition Check Timing

    Engine

    Not within the specified temperature range (varies depending on the vehicle usage environment)

    Tip:

    • The upper limit is 105°C (221°F)

    • The lower limit is maximum 65°C (149°F)

    Engine has not warmed up

    Within the specified temperature range (varies depending on the vehicle usage environment)

    Always

    Atmospheric pressure 75 kPa (0.8 kgf/cm2, 11 psi) or less

    -

    Atmospheric pressure 75 kPa (0.8 kgf/cm2, 11 psi) or higher

    Always

    DPF warning light on (Excessive PM accumulation)

    -

    DPF warning light off (PM regeneration complete)

    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 is on

    • Ambient temperature is 10°C (50°F) or less

    • Coolant temperature is less than 45°C (113°F)

    Heater performance decreases

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

    • Blower switch is off

    While the heater is on

    Heater switch is on (for Combustion Type Power Heater System)

    -

    Heater switch is off (for Combustion Type Power Heater System)

    While the heater is on

    Cooling function:

    All of the following conditions are met:

    • Blower switch is on

    • Air conditioning switch is on

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

    • Evaporator temperature is 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 less

    • Blower switch is off

    • Air conditioning switch is off

    While the air conditioning system (cooling function) is on

    Defogger:

    All of the following conditions have been met:

    1. Blower switch is on

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

    1. Fogging of windows

    2. Air conditioning performance decreases

    3. Odor from air vents

    1. Blower switch is off

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

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

    Driver Door

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

    Driver door courtesy switch ON signal is input

    Driver door is closed

    Always

    Engine Hood

    Engine hood is opened before engine stop by stop and start control

    Engine hood switch OFF signal is input

    Engine hood is closed

    Always

    Seat Belt

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

    Driver seat belt buckle switch OFF signal is input

    Driver seat belt is fastened

    Always

    Ambient Temperature

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

    -

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

    Always

    Power Source

    Battery voltage drops below 6.6 V at engine start

    Battery charge is insufficient or battery has deteriorated

    Battery is charged or replaced

    Every time the engine is started

    Battery temperature is -15°C (5°F) or less 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

    Always

    Battery integrated current* value is:

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

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

      • -6451 A-sec or less: The battery charge is sufficient and the battery temperature is -1°C (30.2°F) or higher and below 70°C (158°F)

      • -1152 A-sec or less: The battery charge is insufficient or the battery temperature is below -1°C (30.2°F) or 70°C (158°F) or higher

    • Heavy electrical load

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

    Battery integrated current* value is 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:

      • -5299 A-sec or higher: The battery charge is sufficient and the battery temperature is -1°C (30.2°F) or higher and below 70°C (158°F)

      • 0 A-sec or higher: The battery charge is insufficient or the battery temperature is below -1°C (30.2°F) or 70°C (158°F) or higher

    Always

    During refresh charge

    A refresh charge of 30 minutes or more is performed after every 20 hours of driving

    Refresh charge is completed

    Always

    Idling stop rate 40% or higher

    -

    Idling stop rate 24% or less

    Always

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

    -

    Ignition switch is turned off

    Every time the engine is started
    Tip:

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

    • When the cable is disconnected from the negative (-) battery terminal, stop and start control is prohibited for a certain amount of time. After connecting the cable, drive the vehicle until stop and start control is permitted (approximately 15 to 40 minutes).

    • Allow the engine to idle for 3 minutes after the engine warms up and check that the engine 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

    The blinking interval is 0.15 seconds.

    Does not come on

    Sounds

    Control is prohibited by the stop and start cancel switch

    Normal operation

    Does not come on

    Comes on

    Does not sound

    Diagnostic trouble code

    Any DTCs are stored

    Does not come on

    The blinking interval is 0.5 seconds.

    Does not sound

    Starter life

    The number of times the starter has been operated exceeds its limit

    Does not come on

    The blinking interval is 0.5 seconds.

    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 is 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 switch assembly (for upper)

    Stuck off

    -

    • Clutch Lower SW

    • N/Clutch Lower SW Abnoml

    Stop and start control prohibited

    CLU (clutch 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 the engine hood being closed

    BRVC/PB/BRE2 (vacuum sensor) circuit

    Open

    P1540

    • 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

    • Wire harness or connector

    • Vacuum sensor assembly

    • Brake booster assembly

    • Check valve to connector tube hose

    Shorted

    P1540

    Remains at intermediate value

    P1541

    ECAN (stop and start cancel switch) circuit

    Stuck on

    -

    Cancel Switch

    Stop and start control prohibited

    • Wire harness or connector

    • Stop and start system cancel switch (combination switch assembly)

    Stuck off

    -

    Cancel Switch

    Stop and start control cannot be canceled by pressing the stop and start system cancel switch (combination switch assembly)

    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
    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

    ECD system

    MIL illuminated

    DTCs for ECD system output

    Oper Permission (ECM)

    Stop and start control prohibited

    ECD 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

    • ECD system (crankshaft position sensor circuit)

    • Wire harness or connector

    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 Spd1 (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 (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 (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 temp 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

    (recovers when the ignition switch is turned off)

    • Check for a 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

    U0140

    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.