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 or starter switch assembly (w/o Entry and Start System) or push start switch assembly (w/ Entry and Start System) 5 seconds or more have passed with the ignition switch ON
      Engine Coolant Temperature 15 to 105°C (59 to 221°F)
      Ambient Temperature Higher than -5°C (23°F)
      Driver Door 3 seconds have elapsed after driver door closed
      Driver Seat Belt 3 seconds have elapsed after driver seat belt fastened
      Vehicle Stability Control System Normal
      Brake Booster Vacuum Sufficient

      Brake Master Cylinder Fluid Pressure

      (for Automatic Transmission)

      1400 kPa (14.3 kgf/cm2, 203 psi)
      Shift Position

      • for Automatic Transmission:

        After shift lever is operated and 1 second elapses, shift lever is in P, D or S

        Tech Tips

        P is a valid condition when the shift lever is moved from D to P after the stop and start control operates in D for 2 seconds or more.

      • for Manual Transmission:

        Shift lever is in neutral

      Automatic Transmission Fluid Temperature

      (for Automatic Transmission)

      		 25 to 112°C (77 to 233.6°F)
      Stop and Start System Cancel Switch (Ecorun Cancel Switch Assembly) Off (System control is not prohibited)
      Vehicle Speed 0 km/h (0 mph) (After the engine warms up)

      Road Grade

      (for Automatic Transmission)

      		 -8° to +8°
      Engine Speed 1250 rpm or less
      Hood 3 seconds have elapsed after hood closed
      Battery Voltage

        When using specified battery:

      • for Automatic Transmission:

        Higher than 7.6 V when starter begins operation and higher than 8.14 V when cranking

      • for Manual Transmission:

        Higher than 6.91 V when starter begins operation and higher than 6.5 V when cranking


        When using non-specified battery:

      • Higher than 8.92 V when starter begins operation and higher than 8.92 V when cranking
      Battery Temperature*1 Between -10°C and 70°C (14°F and 158°F)
      Idle Stop Battery Integrated Current*2

        One of the following conditions is met:

      • Higher than -6451 A-sec: "Status of Battery Charge Control"*3 is Charge Control Coordination Mode, Stop and Start Standalone Mode or Low Temperature Mode

      • Higher than -1152 A-sec: "Status of Battery Charge Control"*3 is 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 is off

      • Blower switch is on when the ambient temperature is higher than 10°C (50°F), the engine coolant temperature is higher than 55°C (131°F) or the room temperature is 5°C (41°F) lower than the set temperature

      • Blower switch on, air conditioning switch off and a certain amount of time has elapsed after engine restarted by stop and start control
      Steering Operation 45 deg/s or less
      Engine Control Engine catalytic rapid warm-up is completed

      Tech Tips


      • *1: When the battery temperature is below -15°C (5°F), 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 below 70°C (158°F), 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: Please refer to the Data List "Status of Battery Charge Control" for information about the status of the battery charge control.

    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

      (for Automatic Transmission)

      		 Brake booster vacuum insufficient (Brake booster vacuum changes in accordance with brake fluid pressure (brake pedal effort))
      Engine Hood Courtesy Switch (Hood Lock Assembly) Engine hood courtesy switch (hood lock assembly) malfunctioning
      ECD System Malfunction in ECD System is detected

      Electromagnetic Oil Pump

      (for Automatic Transmission)

      		 Electromagnetic oil pump malfunctioning

      Vehicle Stability Control System

      (for Automatic Transmission)

      		 Malfunction in vehicle stability control system is detected
      Air Conditioning Timer in the air conditioning amplifier assembly runs out
      Heater Timer in the air conditioning amplifier assembly runs out
      Air Conditioning/Heater

        Both of the following conditions are met:

      • Blower switch: ON

      • Evaporator temperature exceeds threshold value (threshold value varies with temperature, humidity and amount of solar radiation)


        Any of the following conditions are met:

      • A/C switch, blower switch: ON

      • Defogger switch: ON (for Automatic Air Conditioning)

      • Blower switch turned off during auto control or blower mode changed to manual (for Automatic Air Conditioning)

      • Changes from stop and start system priority control to normal system control
      Battery Battery voltage drops (11.4 V or less)
      Battery Integrated Current* The accumulated value of discharge current during engine stop is too large (over 6912 A-sec)
      Vehicle Speed Vehicle speed signal is input (Vehicle stopped on a slope, etc.)
      Driver Door Open
      Driver Seat Belt Driver seat belt is unfastened
      Steering Wheel Steering wheel turned 25 deg or more

      Brake Pedal

      (for Automatic Transmission)

      		 Brake pedal released (brake fluid pressure decreases)
      Accelerator Pedal Accelerator pedal is depressed

      Tech Tips

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

      Click here

  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 15°C (59°F) Engine has not warmed up Engine coolant temperature 15 to 105°C (59 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
    Engine catalytic rapid warm-up Engine catalytic rapid warm-up is being performed Engine catalytic rapid warm-up is completed Each time engine is started or vehicle is stopped
    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
    Brake master cylinder fluid pressure decreases Brake pedal depressed lightly Brake pedal depressed more Every time the vehicle stops

    Hill-start Assist Control

    (for Automatic Transmission)

    		 Brake control system malfunction DTC detected Brake control system returns normally Always
    When hill-start assist control prohibition is necessary Vehicle speed is 3 km/h (1.8 mph) or more Vehicle is being stopped (vehicle speed is below 3 km/h (1.8 mph)) Always
    Communication between engine stop and start ECU and skid control ECU (brake actuator assembly) is invalid Communication invalid Communication between engine stop and start ECU and skid control ECU (brake actuator assembly) is valid Always

    Gradient of Road Surface

    (for Automatic Transmission)

    		 Outside the permitted gradient range (vehicle front and rear road surface incline +8° or higher or -8° or lower) Vehicle front and rear road surface incline +8° or higher or -8° or lower Within the permitted gradient range (vehicle front and rear road surface incline within +/-8°) Always
    Air Conditioning

    Heater:


      All of the following conditions are met:

    • Blower switch on

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

    • Engine coolant temperature 55°C (131°F) or less

    • Cabin temperature lower than set temperature by 5°C (41°F) or less

    		 Heater performance decreases

    • Actual temperature higher than target temperature

    • Blower switch off

    		 While the heater is on

    Cooling function:


      When blower switch and A/C switch is on and ambient temperature 23°C (73.4°F) or higher, any of the following conditions are met (only when the ignition switch is first turned to ON):

    1. Evaporator temperature 9°C (48.2°F) or higher

    2. Cabin temperature higher than set temperature by 3°C (37.4°F) or higher, or blower level 16 or higher

    		 Cooling performance decreases

      Any of the following conditions have been met:

    1. Actual temperature higher than target temperature

    2. Blower switch is off

    3. Air conditioning switch is off

    		 While the air conditioning system (cooling function) is on

    Defogger:


      Any of the following conditions are met:

    1. Defogger switch or blower switch on

    2. A certain amount of time after the engine is restarted by stop and start control when the ambient temperature is 10°C (50°F) or lower and the blower switch is on.

    3. A certain amount of time after engine is restarted by stop and start control when the ambient temperature is -7°C (19.4°F) or higher and air conditioning switch is on.

    • Fogging of windows

    • Air conditioning performance decreases

    • Odor from air vents

      Any of the following conditions are met:

    1. Defogger switch or blower switch off

    2. A certain amount of time has elapsed after restarting the engine by stop and start control

    3. A certain amount of time has elapsed or the air conditioning switch is off after restarting the engine by the stop and start control

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

    Temporary stop and start control:


      Both of the following conditions are met:

    • Blower switch on

    • Evaporator temperature exceeds threshold (threshold varies with temperature, humidity and amount of solar radiation)

    		 Blower switch on Blower switch off and evaporator temperature within specified range Always
    Driver Door Driver door opened before engine stop by engine stop and start control Driver door courtesy switch ON signal input 3 seconds have elapsed since driver door was closed Always
    Engine Hood Engine hood opened before engine stop by stop and start control Engine hood switch OFF signal input 3 seconds have passed since engine hood was 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 3 seconds have passed since driver seat belt was fastened Always
    Steering Wheel Steering wheel turned at a speed of 45 deg/s or more Steering wheel operation signal input Steering wheel being held Always
    Automatic Transmission Assembly Automatic transmission fluid temperature: Below 25°C (77°F) or 112°C (233.6°F) or higher Automatic transmission fluid temperature signal input Permission oil temperature range reached Always

    Shift Position

    (for Automatic Transmission)

    		 Shift lever in R Shift position signal input Brake pedal depressed and shift lever in D or S Always
    Ambient Temperature Ambient temperature -6°C (21.2°F) or lower - Ambient temperature -5°C (23°F) or higher Always
    Power Source

      When using specified battery:

    • for Automatic Transmission:

      7.6 V or less when starter begins operation and 8.14 V or less when cranking

    • for Manual Transmission:

      6.91 V or less when starter begins operation and 6.5 V or less when cranking


      When using non-specified battery:

    • 8.92 V or less when starter begins operation and 8.92 V or less when cranking

    		 Battery charge insufficient or battery has deteriorated Battery charged or replaced Every time the engine started
    Battery temperature below -15°C (5°F) or 75°C (167°F) or higher Depends on ambient temperature An appropriate battery temperature is reached (between -10 and 70°C (14 to 158°F)) Always

      Battery integrated current*1 value meets one of the following conditions:

    • -6451 A-sec or less: "Status of Battery Charge Control"*2 is Charge Control Coordination Mode, Stop and Start Standalone Mode or Low Temperature Mode

    • -1152 A-sec or less: "Status of Battery Charge Control"*2 is 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*1 value meets one of the following conditions:

    • Higher than -6451 A-sec: "Status of Battery Charge Control"*2 is Charge Control Coordination Mode, Stop and Start Standalone Mode or Low Temperature Mode

    • Higher than -1152 A-sec: "Status of Battery Charge Control"*2 is Stop and Start Restriction Mode or Temperature High/Low Mode

    		 Always
    During refresh charge

    • Cable reconnected to negative (-) battery terminal

    • Refresh charge is performed for 30 minutes or longer for every 30 hours of driving

    • Cable reconnected to negative (-) battery terminal: 5 to 60 minutes

    • Periodic refresh charge: 30 to 60 minutes

    		 Always
    Engine started with the engine hood open (for jump starting) - After ignition switch is turned off, ignition switch is turned to ON with hood closed Every time the engine started
    Idling Stop Rate Idling stop rate for one trip is more than 50% or total idling stop rate is more than 40% Vehicle is stopped with high frequency Idling stop rate has decreased due to vehicle being driven and engine idling Always

    Transfer

    (for 4WD)

    		 Transfer L4 position - Transfer H4 or H2 position Always

    Rear Differential

    (w/ Rear Differential Lock)

    		 Rear differential lock position - Rear differential free Always

    Tech Tips


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

    • *2: Please refer to the Data List "Status of Battery Charge Control" for information about the status of the battery charge control.

    • If the cable is disconnected from the battery terminal, stop and start control is prohibited until refresh charge is completed.

      In this case, let the vehicle idle with the battery temperature at 11°C (51°F) or higher for 5 to 60 minutes to complete the refresh charge. (The refresh charge is complete when the Data List item Status of Battery Charge Control changes from "Refresh Charge Mode".)

    • If the GTS is not available and the Data List item Status of Battery Charge Control cannot be checked, charge the battery by idling the engine for approximately 5 to 60 minutes or driving the vehicle, and then drive the vehicle and check that stop and start control operates.

      If the engine is started with the hood open, the system determines that a jump start has occurred. Therefore, make sure that the hood is closed before starting the engine and driving the vehicle.

    • After the refresh charge completes, turn the engine switch off, wait for at least 30 seconds, and then start the engine again.

      If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.

    • 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

      for Automatic Transmission:

    • The engine hood is opened with the shift lever in P, D or S


      for Manual Transmission:

    • The engine hood is opened with the shift lever in other than neutral

    		 The engine stops (mode changes to "stalled", and the engine cannot be restarted until the ignition switch is turned off and then ON)

      for Automatic Transmission:

    • The driver door is opened with the shift lever in P, D or S


      for Manual Transmission:

    • The driver door is opened with the shift lever in other than neutral

      for Automatic Transmission:

    • The engine starts, warning buzzer sounds and stop and start indicator light blinks


      for Manual Transmission:

    • The buzzer sounds and stop and start indicator light blinks (engine will not start)
    The driver seat belt is unfastened The engine starts

      for Manual Transmission:

    • 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

    A01SHKWC01
    *a Stop and Start Indicator Light
    *b Stop and Start Cancel Indicator Light

    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.

    Stop and Start Indicator and Buzzer Operation
    Item Condition Stop and start indicator light Stop and start cancel indicator light Buzzer
    For 3 seconds after the ignition switch 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
    Driver door opened The blinking interval 0.15 seconds* Does not come on Sounds*
    After engine started by stop and start control Driver door opened within 5 seconds of engine start The blinking interval 0.15 seconds* Does not come on Sounds*
    Control is prohibited by the stop and start system cancel switch (ecorun cancel switch assembly) 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 intervals. Does not sound
    Starter assembly life Number of times the starter has been operated exceeds its limit Does not come on Blinks at 0.5 second intervals. Does not sound
    Flywheel sub-assembly life Number of times the engine start has been operated exceeds its limit Does not come on Blinks at 0.5 second intervals. Does not sound

    Tech Tips

    *: Shift lever in P, D or S (for Automatic Transmission) or in other than neutral and reverse (for Manual Transmission).

  5. STOP AND START SYSTEM OPERATION CONDITION DISPLAY FUNCTION

    The stop and start system operation condition is displayed on the multi-information display.

    *1: When the engine cannot be stopped by the stop and start system or the engine is restarted while the engine is stopped by the stop and start system, the following mark is displayed on the multi-information display.

    Stop and Start System Condition Multi-information Display Message*2 Vehicle Condition
    When the engine cannot be stopped by the stop and start system A01SJPE

    *1

    		 "Depress Brake Firmly to Activate" (for Automatic Transmission) The brake pedal is not depressed enough.
    "For Climate Control"

    • The air conditioning system is being used when the ambient temperature is high or low.

    • Windshield defogger is pressed.
    "Battery Charging"

    • The battery charge amount may be low.

    • A refresh charge may be occurring.

    • The engine may have been started with the hood opened

    • The battery may be cold

    • The battery may be extremely hot
    "For Brake System"

    • The brake booster load decreased.

    • The vehicle is operated at a high elevation.
    "Driver Seat Belt Unbuckled" The driver seat belt is not fastened.
    "Non-Dedicated Battery" A non-specified battery for the stop and start system may have been installed.
    When the engine automatically restarts while stopped by the stop and start system A01SJPE

    *1

    		 "Driver Seat Belt Unbuckled" The driver seat belt is not fastened.
    "Steering Wheel Turned" The steering wheel is turned.
    "For Brake System" The brake pedal is strongly depressed further or pumped.
    "For Climate Control"

    • The air conditioning system is turned on or the air conditioning is being used.

    • Windshield defogger is turned on.
    "Battery Charging" The battery charge amount may be low.
    Stop and start system may be malfunctioning -

    "Stop & Start System Malfunction"

    "Visit Your Dealer"

    		 -

    Tech Tips

    *2: Examples of messages displayed during different situations are listed below in order of priority (some messages may not be displayed depending on the vehicle).


    • Engine cannot be stopped by stop and start system

      "Non-Dedicated Battery", "Battery Charging", "For Brake System", "For Climate Control", "Driver Seat Belt Unbuckled", "Depress Brake Firmly to Activate"

    • Engine automatically restarted while engine stopped by stop and start system

      "Driver Seat Belt Unbuckled", "Steering Wheel Turned", "For Brake System", "For Climate Control", "Battery Charging"

  6. 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 malfunction 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

    CLL (park/neutral position switch assembly) circuit

    (for Automatic Transmission)

    		 Stuck on P1780

    • Neutral Switch

    • Neutral Switch Stuck ON

    • Neutral SW Abnoml (ON)

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • Wire harness or connector

    • Park/neutral position switch assembly
    Stuck off P1780

    • Neutral Switch

    • Neutral Switch Stuck OFF

    • Neutral SW Abnoml (OFF)

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

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

    (for Manual Transmission)

    		 Stuck on P1862

    • Clutch Upper SW

    • Clutch Upper SW Stuck ON

    • N/Clutch Upper SW Abnoml (ON)

    • 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 Upper SW

    • Clutch Upper SW Stuck OFF

    • N/Clutch Upper SW Abnoml (OFF)

    		 Stop and start control prohibited
    BNT1 (engine hood courtesy switch) circuit Stuck on - Hood Courtesy Switch

    for Automatic Transmission:


    • Mode does not change to "stalled" when engine hood opened with shift lever in P, D or S and engine stopped by stop and start control

    for Manual Transmission:


    • Mode does not change to "stalled" when engine hood opened with shift lever in neutral and engine stopped by stop and start control

    • Wire harness or connector

    • Engine hood courtesy switch (Hood lock assembly)
    Stuck off - Hood Courtesy Switch Stop and start control prohibited despite 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

    • Vacuum hose (brake booster hose)
    Shorted P1540
    Remains at intermediate value P1541
    ECAN (stop and start system cancel switch (ecorun cancel switch assembly)) circuit "Stop and Start Control" cannot be changed (continue current status) - Cancel Switch Control permission of the stop and start system cancel switch (ecorun cancel switch assembly) cannot be switched by operating the switch

    • Wire harness or connector

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

    EMOP circuit

    EGND circuit

    (Electromagnetic oil pump)

    (for Automatic Transmission)

    • Open

    • Shorted

    • Internal circuit malfunction

    • Battery

    		 P2796

    • Electromagnetic Oil Pump Abnormal When Non Drive

    • Electromagnetic Oil Pump Abnormal When Drive

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • Wire harness or connector

    • Transmission wire

    • Engine stop and start ECU

    • Electromagnetic oil pump

    • Engine stop and start solenoid filter

    Electromagnetic oil pump

    (for Automatic Transmission)

    		 Electromagnetic oil pump malfunction P0942 Oil Pump Abnormal Stop and start control prohibited Electromagnetic oil pump
    STA circuit Overcurrent P0617

    • Starter Relay Overcurrent

    • Starter Circuit Abnoml

    • Starter Circuit Open

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • BBC NO. 1 fuse

    • BBC NO. 3 fuse

    • Wire harness or connector

    • ST NO. 1 relay

    • ST NO. 2 relay

    • Engine stop and start ECU
    Stuck on P1644

    • Wire harness or connector

    • ST NO. 1 relay

    • ST NO. 2 relay

    • Engine stop and start ECU
    Stuck off P1644
    BBC (backup boost converter) circuit Overcurrent B22C0

    • State of BBC

    • BBC Abnoml

    • BBC Overcurrent

    • BBC Check Result

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • BBC NO. 1 fuse

    • BBC NO. 3 fuse

    • Wire harness or connector

    • Engine stop and start ECU

    • Battery

    • ECUs and sensors connected to IG41 and B42

    • 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 NO. 1 fuse

    • BBC NO. 3 fuse

    • Wire harness or connector

    • Engine stop and start ECU

    • Battery
    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
    Starter delay circuit Malfunction P161D

    • Pinion Gear

    • Starter Motor

    • Starter Delay Circuit

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    		 Engine stop and start ECU
    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 1)

    • Oper Permission (ECM 2)

    		 Stop and start control prohibited ECD system
    Abnormal NE signal DTCs for ECD system output Crank Pos Sen Abnoml 3

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • ECD system (crank position sensor circuit)

    • Wire harness or connector
    Crankshaft reverse rotation detection DTCs for ECD system output -

    • Stop and start control prohibited

    • MIL illuminated

    		 ECD system (crank position sensor circuit)
    Charging system Battery state sensor assembly malfunction DTCs for charging system output

    • Battery Fluid Temperature

    • Integrated Current

    		 Stop and start control prohibited Charging system
    Vehicle stability control system VSC Running - 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
    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 Signal

    • 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 NO. 1 fuse

    • BBC NO. 3 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 NO. 1 relay replacement is required.

    • ST NO. 2 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 Req (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

    U0114

    U0126

    U0151

    U0155*

    U0164

    		 -

    • Stop and start control prohibited

    • Stop and start cancel indicator light blinks

    • Applicable wire harness or connector

    • Applicable ECU

    Tech Tips

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