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STOP AND START SYSTEM SYSTEM DESCRIPTION

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  1. STOP AND START CONTROL

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


    1. When the conditions in the following table have been met, the engine can be stopped due to Stop and Start system control.

      Item

      Condition

      (All of the following conditions are met)
      Idle Stop Ignition Switch After more than 5 seconds have been passed with the ignition switch on
      Engine Coolant Temperature 40°C to 105°C (104°F to 221°F)
      Driver Door Closed
      Driver Seat Belt*2 Driver seat belt has been fastened
      Brake Control System Proper
      Brake Booster Vacuum Sufficient brake booster vacuum
      Shift position*2 After one second has passed after moving the shift lever to P, N, or D
      CVT fluid temperature*2 25°C to 100°C (77°F to 212°F)
      Stop and Start Cancel Switch System control has not been prohibited using the stop and start cancel switch
      Vehicle Speed 0 km/h (0 mph) (After the engine warms up)
      Gradient of Road Surface Within the allowable gradient range (gradient of road surface below 8 degree)
      Engine Speed 1200 rpm or less
      Hood Closed
      Battery Voltage

      7.2 V or more at engine start*1

      7.6 V or more at engine start*2
      Battery Temperature -10°C to 70°C (14°F to 158°F)
      Battery Integrated Current*

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

      2. After the integrated current value has increased to 0 A-sec or more at least once since ignition switch ON:


        • More than -3110 A-sec: When a low battery temperature condition is not detected (the battery temperature is 11°C (51.8°F) or more).*1

        • More than -3564 A-sec: When a low battery temperature condition is not detected (the battery temperature is 11°C (51.8°F) or more).*2

        • More than -864 A-sec: When a low battery temperature condition is detected (the battery temperature is less than 10°C (50°F)).*1

        • More than -990 A-sec: When a low battery temperature condition is detected (the battery temperature is less than 10°C (50°F)).*2
      Air Conditioning

      Regarding the following three conditions, when either condition 1 or conditions 2 and 3 are met:


      1. Air conditioning is off

      2. Only at the first ignition ON, the air conditioning is on when the outside temperature is 25°C (77°F) or less and the evaporator temperature is 8°C (46°F) or less

      3. For 30 seconds after restarting the engine by stop and start control, when the air conditioning switch is on.
      Heater

      Either of the following conditions is met:


      • The heater is off

      • The heater is on when the outside temperature is 10°C (50°F) or higher or the engine coolant temperature is 55°C (131°F) or higher

      • For 10 seconds after restarting the engine by stop and start control, when the air conditioning switch is on, or the blower switch is on.
      Defogger Control After a certain period of time has passed after stopping and restarting the engine due to stop and start control

      *1: for Manual Transaxle

      *2: for CVT

      Tip:

      *: Refer to Data List items "Integrated Current" and "Battery Integrated Current" (Click here).

    2. When the engine has been stopped due to Stop and Start system 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

      The brake booster vacuum is insufficient

      (The negative pressure can be changed by the hydraulic brake pressure (applying pressure to the brake pedal)*)
      Brake Control System* Brake control system malfunction is detected
      Air Conditioning The timer in the A/C amplifier runs out when the air conditioning is on
      Heater The blower output temperature drops when the heater is on
      Air Conditioning/Heater

      • The air conditioning switch is turned on while the engine is stopped

      • The defogger switch is turned on while the engine is stopped (for automatic air conditioner)
      Battery Battery performance or voltage drops
      Vehicle Speed Vehicle speed signal is input
      Driver Door* Driver door is opened
      Driver Seat Belt* Driver seat belt is unfastened

      *: for CVT

  2. SYSTEM PROHIBIT CONTROL

    The engine stop and start ECU prohibits Stop and Start system control 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 is less than 40°C (104°F) Engine has not warmed up Engine coolant temperature is 40°C to 105°C (104°F to 221°F) Always
    Idle speed learning has not completed Stop and Start system control is 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 or another reason Normal brake booster vacuum is reached Every time the vehicle stops
    Hill Start Control*2 Brake control system malfunction DTC output Brake control system normalization Always
    The shift lever is in driving position, and the brake pedal is not depressed During normal driving The shift lever is in driving position, and the brake pedal is depressed Always
    Communication between the engine stop and start ECU and the skid control ECU is not effective Communication is not effective. Communication between the engine stop and start ECU and the skid control ECU is effective Always
    Gradient of Road Surface*2 Not within the allowable gradient range (gradient of road surface above 8 degree) Gradient of road surface above 8 degree Within the allowable gradient range (gradient of road surface below 8 degree) Always
    Air conditioning

    Heater:

    All of the following conditions have been met:


    • Blower switch is on

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

    • Coolant temperature is less than 55°C (131°F)

    		 Heater function is not effective

    • Coolant temperature is 55°C (131°F) or more

    • Blower switch is turned off

    		 During heater operation

    Cooling function:

    All of the following conditions have been met:


    • Blower switch is on

    • Air conditioning switch is on

    • Outside temperature is 25°C (77°F) or more

    • Evaporator temperature is 8°C (46°F) or more (Once the temperature drops below 8°C (46°F) after the ignition switch is turned to ON, Stop and Start system control will be restored)

    		 Cooling function is not effective

    Any of the following conditions have been met:


    • Evaporator temperature is 8°C (46°F) or less

    • Blower switch is turned off

    • Air conditioning system is turned off

    		 While air conditioning system (cooling function) is on

    Defogger:

    All of the following conditions have been met:


    1. The defogger switch is on and the blower switch is on (only for automatic air conditioners)

    2. For 10 seconds after restarting the engine by stop and start control, when the outside temperature is 10°C (50°F) or lower and the blower switch is on.

    3. For 30 seconds after restarting the engine by stop and start control, when the outside temperature is -7°C (19.4°F) or higher, the air conditioning switch is on, and the blower switch is on.

    1. Windows are easily fogged

    2. Heater function is not effective

    3. Odor prevention

    1. Blower switch is turned off

    2. 10 seconds have passed after restarting the engine by the stop and start control.

    3. 30 seconds have passed after restarting the engine by the stop and start control or the air conditioning system is turned off.

    		 While air conditioning system (cooling function for defogger) is on
    Door/engine hood Driver door is opened before the engine stopped due to engine stop and start control Driver door courtesy switch ON signal is input Driver door is closed Always
    Engine hood is opened before the engine stopped due to stop and start control Engine hood switch OFF signal is input Engine hood is closed Always
    Seat belt*2 Driver seat belt is not fastened before the engine stopped due to engine stop and start control Driver seat belt buckle switch OFF signal is input Driver seat belt is fastened Always
    Power source

    Battery voltage drops below 7.2 V at engine start*1

    Battery voltage drops below 7.6 V at engine start*2

    		 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 outside temperature An appropriate battery temperature is reached Always
    Power source

    Battery integrated current* value is:


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

    2. After the integrated current value has increased to 0 A-sec or more at least once since ignition switch ON:


      • -3110 A-sec or less: When a low battery temperature condition is not detected (the battery temperature is 11°C (51.8°F) or more).*1

      • -3564 A-sec or less: When a low battery temperature condition is not detected (the battery temperature is 11°C (51.8°F) or more).*2

      • -864 A-sec or less: When a low battery temperature condition is detected (the battery temperature is less than 10°C (50°F)).*1

      • -990 A-sec or less: When a low battery temperature condition is detected (the battery temperature is less than 10°C (50°F)).*2

    • Heavy electrical load

    • High stop and start rate (Time that engine stopped due to Stop and Start system control is long)

    Battery integrated current* value is more than a certain level.


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

    2. After the integrated current value has increased to 0 A-sec or more at least once since ignition switch ON:


      • More than -2246 A-sec: When a low battery temperature condition is not detected (the battery temperature is 11°C (51.8°F) or more).

      • More than 0 A-sec: When a low battery temperature condition is detected (the battery temperature is less than 10°C (50°F)).

    		 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
    Engine is started with the engine hood open (for jump starting) - Ignition switch is turned off Every time the engine is started

    *1: for Manual Transaxle

    *2: for CVT

    Tip:

    • *: Refer to Data List items "Integrated Current" and "Battery Integrated Current" (Click here).

    • If the ECM learned values have been cleared by disconnecting the battery or for another reason, Stop and Start system control will be prohibited until ECM learning completes.

    • 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 system 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*1 The buzzer sounds
    The driver door is opened while the shift lever is in D*2 The engine starts, buzzer sounds and stop and start indicator light blinks
    The driver door is opened while the shift lever is in P or N* The engine starts
    The driver seat belt is unfastened*2 The engine starts
    Hood is opened (ALL position)*1 The engine changes to "stalled"
    The hood is opened while the shift lever is in P or N*2 The engine starts
    The hood is opened while the shift lever is in D*2 Engine stops (Engine enters stall mode, and recovers after the ignition switch is moved to IG OFF and then IG ON)
    Shift lever is operated without depressing the clutch pedal*1 The buzzer sounds (engine will not start)
    The shift lever is moved from N to D or R without the brake pedal being depressed*2 The buzzer sounds and stop and start indicator light blinks (engine will not start)

    *1: for Manual Transaxle

    *2: for CVT

  4. A01VG06E01

    WARNING INDICATOR AND BUZZER OPERATION

    System control status and warnings are shown to the driver by the stop and start indicator light, stop and start cancel indicator light and the buzzer.

    Table 1. Text In Illustration
    *a

    Stop and start cancel indicator light

    (Orange)
    *b

    Stop and start indicator light

    (Green)
    Table 2. Stop and start indicator and Buzzer Operation
    Item Condition

    Stop and start indicator

    (Green)

    Stop and start cancel indicator

    (Orange)

    		 Buzzer
    For 3 seconds after the ignition switch is turned to ON Normal operation Come on Come on Does not sound
    During stop and start system control operating (engine is stopped) Normal operation Come on Does not come on Does not sound
    The driver seat belt is unfastened*3 Does not come on
    The driver seat belt is unfastened*4 Come on
    The driver door is opened*3 Blinks*1, *5 Sounds*5
    The driver door is opened*4 Come on Sounds
    The shift lever is operated without depressing the brake pedal*3 Does not come on
    The shift lever is operated without depressing the clutch pedal*4
    Control is prohibited due to the stop and start cancel switch Normal operation Does not come on come on Does not sound
    Diagnosis Any DTCs are stored Does not come on Blinks*2 Does not sound
    Starter life span The number of times the starter has been operated exceeds the threshold Does not come on Blinks*2 Does not sound

    *1: The blinking interval is 0.13 seconds.

    *2: The blinking interval is 0.5 seconds.

    *3: for CVT

    *4: for Manual Transaxle

    *5: While the shift lever is in D

  5. EFFECT OF MALFUNCTION ON STOP AND START SYSTEM OPERATION

    Depending on the malfunction, Stop and Start system control may be prohibited as a fail-safe function. The following table shows effects on the vehicle and areas to be inspected according to malfunctions in the Stop and Start system.

    Malfunctioning Area Malfunction DTC Output Data List Effect on Vehicle Area to be Inspected
    Input to engine stop and start ECU IGSW circuit Open - IG Switch Stop and Start system control prohibited Harness or connector
    BATT circuit Open P0562 -

    Stop and Start system control prohibited

    If any DTCs are stored, they will be cleared when the ignition switch is turned off

    		 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 system control prohibited Harness or connector

    TMN (neutral position switch) circuit

    *1

    		 Stuck ON - Neutral Switch Stop and Start system control prohibited

    • Harness or connector

    • Neutral position switch
    Stuck OFF - Neutral Switch Stop and Start system control prohibited

    NSW (neutral position switch) circuit

    *2

    		 Stuck ON P1780 Neutral Switch Stop and Start system control prohibited

    • Harness or connector

    • Neutral position switch
    Stuck OFF P1780 Neutral Switch Stop and Start system control prohibited

    CLL (clutch start switch) circuit

    *1

    		 Stuck ON P1862 Clutch Lower SW Stop and Start system control prohibited/stop and start cancel indicator blinks

    • Harness or connector

    • Clutch start switch assembly

    • No. 2 clutch start switch assembly
    Stuck OFF - Clutch Lower SW Stop and Start system control prohibited

    CLU (No. 2 clutch start switch) circuit

    *1

    		 Stuck ON P1862 Clutch Upper SW Stop and Start system control prohibited/stop and start cancel indicator blinks
    Stuck OFF - Clutch Upper SW Stop and Start system control prohibited
    Input to engine stop and start ECU TFAL (cooler thermistor) circuit Open - A/C Outlet Temp Automatic engine start request made despite a high vent temperature

    • Harness or connector

    • Cooler thermistor
    Shorted - A/C Outlet Temp The engine start request is not made, despite a low vent temperature.
    SBL (heater relay) circuit Open - Blower Switch Automatic engine start request not made despite the heater being turned on

    • Harness or connector

    • Heater relay

    • Blower switch
    Shorted -

    Blower Switch

    (Switch is on at all time)

    Stop and Start system control prohibited

    The engine start request is made without operating the blower switch.
    BNT1 (hood lock switch) circuit Stuck ON - Hood Courtesy Switch -

    • Harness or connector

    • Hood lock switch
    Stuck OFF - Hood Courtesy Switch Stop and Start system control prohibited despite the engine hood being closed
    BRVC/PB/BRE2 (vacuum sensor) circuit Open P1540 - Stop and Start system control prohibited/stop and start cancel indicator blinks

    • Harness or connector

    • Vacuum sensor assembly

    • Brake booster

    • Brake booster hose
    Shorted P1540 - Stop and Start system control prohibited/stop and start cancel indicator blinks
    Remains at intermediate value P1540 - Stop and Start system control prohibited/stop and start cancel indicator blinks
    VC/IB/E2/THB (battery current sensor) circuit Open -

    Battery Current

    Battery Temp (Start)

    		 Stop and Start system control prohibited

    • Harness or connector

    • Battery current sensor
    Shorted -

    Battery Current

    Battery Temp (Start)

    		 Stop and Start system control prohibited
    Remains at intermediate value -

    Battery Current

    Battery Temp (Start)

    		 Stop and Start system control prohibited
    ECAN (stop and start cancel switch) circuit Stuck ON - Cancel Switch Stop and Start system control prohibited

    • Harness or connector

    • Stop and start cancel switch

    • Engine stop and start ECU
    Stuck OFF - Cancel Switch Stop and Start system control cannot be canceled by pressing the stop and start cancel switch
    Output from engine stop and start ECU DDON (backup boost converter) circuit

    • Open

    • Short

    • Internal circuit malfunction

    • Battery

    		 P323B State of BBC Stop and Start system control prohibited/stop and start cancel indicator blinks

    • Harness or connector

    • Backup boost converter (Eco run vehicle converter assembly)

    • Engine stop and start ECU

    • Battery
    OPM, OPST (CVT oil pump motor) circuit

    • Open

    • Short

    • Internal malfunction

    P1538

    P1539

    • Oil Pump Relay

    • Oil Pump Status

    • Oil Pump Duty

    • State of Oil Pump

    		 Stop and Start system control prohibited/stop and start cancel indicator blinks

    • Harness or connector

    • Engine stop and start ECU

    • CVT assembly (oil pump motor)

    • Oil pump control relay
    STA circuit Stuck ON P1644 Starter Circuit Malfunction Stop and Start system control prohibited/stop and start cancel indicator blinks

    • Engine stop and start ECU

    • Harness or connector
    Stuck OFF P1644 Starter Circuit Malfunction Stop and Start system control prohibited/stop and start cancel indicator blinks
    Engine stop and start ECU EEPROM (memory in the engine stop and start ECU) Malfunction P062F - Stop and Start system control prohibited/stop and start cancel indicator blinks Engine stop and start ECU
    Related systems SFI MIL illuminated DTCs for SFI system output ECM 1 Stop and Start system control prohibited SFI system
    Abnormal NE signal P0335

    • NE Sensor Circuit Open 2

    • NE Sensor Circuit Open 3

    		 Stop and Start system control prohibited/stop and start cancel indicator blinks SFI system (crankshaft position sensor circuit)
    Crankshaft reverse rotation detection P0336 - Stop and Start system control prohibited/MIL illuminated SFI system (crankshaft position sensor)

    CVT

    *2

    		 The electric oil pump is abnormal. - CVT system malfunction Stop and Start system control prohibited CVT system
    ABS/VSC ABS operating - ABS Running Stop and Start system control prohibited -
    Malfunction in wheel speed sensor Brake control system DTCs output

    • Vehicle Spd 1(ABS/VSC)

    • Vehicle Spd 4 (Calc Value)

    		 Stop and Start system control prohibited

    • Harness or connector

    • Brake actuator assembly (skid control ECU)

    • Vehicle speed sensor
    EPS Malfunction in the power steering system EPS assist current value invalid EPS Load Stop and Start system control prohibited

    • Power steering ECU

    • Torque sensor
    Meter Open in vehicle speed signal circuit P0500

    • Vehicle Spd 3 (Spd Signal)

    • Spd Sensor Malfunction 2

    		 Stop and Start system control prohibited/stop and start cancel indicator blinks

    • Harness or connector

    • Combination meter assembly
    Seat belt warning system*2 Malfunction in the seat belt warning system - Driver side Buckle SW Stop and Start system control prohibited

    • Front seat inner belt assembly (Driver side)

    • Harness or connector
    Driver door courtesy light switch circuit Malfunction in the driver door courtesy light switch circuit - Eng Start Req (Courtesy SW) Stop and Start system control prohibited/stop and start indicator blinks/sounds the warning buzzer

    • Front door courtesy light switch assembly (Driver side)

    • Driver door courtesy light switch circuit
    Air conditioning system Malfunction in outside temperature sensor Air conditioning system DTCs output

    • Ambient Temp Sensor

    • Air Conditioning amplifier

    Stop and Start system control prohibited

    Stop and Start system control cannot be canceled by Air conditioning control

    		 Ambient temp sensor circuit
    Related systems Brake Brake booster vacuum drops -

    • Brake Boost Pressure

    • Brake Negative Pressure

    		 Stop and Start system control prohibited

    • Engine vacuum system

    • Vacuum sensor

    • Brake booster assembly

    • Vacuum hose
    Power source Malfunction in backup boost converter (voltage may have dropped) P323B State of BBC Stop and Start system control prohibited/stop and start cancel indicator blinks

    • Harness or connector

    • Backup boost converter (Eco run vehicle converter assembly)

    • Battery
    Malfunction in charging system - Power Management Stop and Start system control prohibited Battery related systems, such as battery current sensor
    Low voltage P0562 Battery Abnormal Stop and Start system control prohibited/stop and start cancel indicator blinks Battery
    BATT circuit open P0562 - Stop and Start system control prohibited Battery circuit
    Others Number of starter operations Exceeds the specified limit P1545 Starter Count Error Stop and Start system control prohibited/stop and start cancel indicator blinks Starter replacement is requested.
    Jump starting Engine started with the engine hood open - Engine Hood Open

    Stop and Start system control prohibited

    (resumes when the ignition switch is turned off)

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

    • Engine hood courtesy switch
    CAN communication Communication interrupted

    • U0100

    • U0121

    • U0131

    • U0140

    • U0151

    • U0155

    • U0164

    • U111A

    		 -

    Stop and Start system control prohibited/stop and start cancel indicator blinks

    Tip:

    If the harness between stop and start ECU and combination meter is open, stop and start cancel indicator does not blink.

    • Applicable harness or connector

    • Applicable ECU

    *1: for Manual Transaxle

    *2: for CVT