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.
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 | Engine Switch | 5 seconds or more have passed with the engine switch on (IG) |
| Engine Coolant Temperature | for 8AR-FTS: 40 to 100°C (104 to 212°F) for 3ZR-FAE: 40 to 105°C (104 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 | Vacuum meets the specified condition (42.5 kPa (319 mmHg, 12.6 in.Hg) or more on a level surface) (Brake booster vacuum varies according to brake master oil pressure) |
|
| Brake Master Cylinder Fluid Pressure*4 | for 8AR-FTS: 1.2 MPa (12.2 kg/cm2, 174 psi) for 3ZR-FAE: 1.5 MPa (15.2 kg/cm2, 217 psi) (changes according to gradient) |
|
| Shift Position | After shift lever is operated and 1 second elapses, shift lever is in D or M | |
| Drive Mode | ECO or NORMAL mode | |
| Automatic Transaxle Fluid Temperature (for 8AR-FTS) |
25 to 110°C (77 to 230°F) | |
| CVT Oil Temperature (for 3ZR-FAE) |
25 to 110°C (77 to 230°F) | |
| Stop and Start System Cancel Switch (Integration Control and Panel Assembly) | Off (System control is not prohibited) | |
| Vehicle Speed | 0 km/h (0 mph) (After the engine warms up and having run) | |
| Road Grade | -8° to +8° | |
| Engine Speed | 1250 rpm or less | |
| Hood | 3 seconds have elapsed after hood closed | |
| Battery Voltage |
When using specified battery:
When using non-specified battery: |
|
| Battery Temperature*1 | -10°C or higher and 70°C or less (14°F or higher and 158°F or less) | |
| Battery Integrated Current*2 |
One of the following conditions is met: |
|
| Air Conditioning | Other than when stop and start control is prohibited | |
| Heater |
One of the following conditions is met: |
|
| Steering Operation | 45 deg/s or less | |
| Engine Control | Engine catalytic rapid warm-up is completed | |
| Dynamic Radar Cruise Control System (for 8AR-FTS, w/ Dynamic Radar Cruise Control System and w/ Full-speed Following Function) |
While full-speed following function is operating, the vehicle is stopped and brake hold control has been entered Tech Tips When the vehicle has been stopped during full-speed following function, perform brake hold control. |
|
| Steering Wheel | When the steerage angle of the steering wheel is 45 degrees or less. | |
| Engine Control | Engine catalytic warm up is completed | |
Tech Tips
*1: When the battery fluid temperature is -15°C (5°F) or less, or 75°C (167°F) or higher, stop and start control is prohibited. When the battery fluid temperature returns to -10°C (14°F) or higher, and 70°C (158°F) or less, stop and start control is permitted.
*2: Read the Data List item "Integrated Current" or "Stop&Start Operating Permission (Integrated Current)" when checking the integrated current value
*3: Please refer to the Data List "Status of Battery Charge Control" for information about the status of the battery charge control.
*4: Brake force is ensured to prevent the vehicle from starting off when the engine restarts.
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 (Brake booster vacuum changes in accordance with brake fluid pressure (brake pedal effort)) |
| SFI System | Malfunction in SFI system is detected | |
| Oil Pump Assembly with Motor | for 8AR-FTS: Oil pump assembly with motor (automatic transaxle assembly) malfunctioning for 3ZR-FAE: Oil pump assembly with motor (continuously variable transaxle assembly) malfunctioning |
|
| Power Steering System | Malfunction in power steering system is detected | |
| Vehicle Stability Control System | 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:
Any of the following conditions are met: |
|
| Battery | Battery voltage drops (11.4 V or less) | |
| Battery Integrated Current* | The accumulated value of discharge current during engine stop is too large (5940 A-sec or more) | |
| 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 | Brake pedal released (brake fluid pressure decreases) Tech Tips for 8AR-FTS: Do not start the engine while the brake hold is operating. |
|
| Accelerator Pedal | Accelerator pedal is depressed | |
| Stop and Start System Cancel Switch (Integration Control and Panel Assembly) | Off (System control is not prohibited) to On (System control is prohibited) | |
| Dynamic Radar Cruise Control System (for 8AR-FTS, w/ Dynamic Radar Cruise Control System and w/ Full-speed Following Function) |
While full-speed following function is operating and brake hold is operating, the proceeding vehicle has taken off. | |
Tech Tips
*: Read the Data List item "Integrated Current" or "Stop&Start Operating Permission (Integrated Current)" when checking the integrated current value
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 | for 8AR-FTS: Engine coolant temperature 40 between 100°C (104°F to 212°F) for 3ZR-FAE: Engine coolant temperature 40 between 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 | |
| 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 | 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 | Outside the permission 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 permission gradient range (vehicle front and rear road surface incline within +/-8°) | Always |
| Air Conditioning | Heater:
All of the following conditions are met: |
Heater performance decreases |
|
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 engine switch is first turned on (IG)): |
Cooling performance decreases |
Any of the following conditions have been met: |
While the air conditioning system (cooling function) is on | |
| Defogger: Defogger switch or blower switch on |
Fogging of windows | Defogger switch or blower switch off | While the air conditioning system (cooling function for defogger) is on | |
| Temporary start and start control:
Both of the following conditions are met: |
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 Transaxle Assembly (for 8AR-FTS) |
Automatic transaxle fluid temperature: Below 25°C (77°F) or 110°C (230°F) or higher | Automatic transaxle fluid temperature signal input | Permission oil temperature range reached | Always |
| CVT (for 3ZR-FAE) |
CVT oil temperature lower than 25°C (77°F) or 110°C (230°F) or higher | CVT Oil Temperature signal is input | An appropriate CVT fluid temperature is reached | Always |
| Shift Position | Shift lever in P, N or R | Shift position signal input | Brake pedal depressed and shift lever in D or M | Always |
| Drive Mode | Drive mode other than ECO or NORMAL mode | Drive mode signal input | Drive mode ECO or NORMAL mode | Always |
| Ambient Temperature | Ambient temperature -5°C (23°F) or lower | - | Ambient temperature -5°C (23°F) or higher | Always |
| Power Source |
When using specified battery:
When using non-specified battery: |
Battery charge insufficient or battery has deteriorated | Battery charged or replaced* *: When prohibited, the prohibition condition continues until the engine switch is turned off |
Every time the engine started |
| Battery fluid temperature -15°C (5°F) or less, or 75°C (167°F) or higher | Depends on environmental temperature | Battery fluid temperature is reached (-10°C (14°F) or higher and 70°C(158°F) or less) | Always | |
Battery integrated current*1 value meets one of the following conditions: |
|
Battery integrated current*1 value meets one of the following conditions: |
Always | |
| During refresh charge |
|
|
Always | |
| Engine started with the engine hood open | - | After engine switch is turned off, engine switch is turned on (IG) with hood closed | Every time the engine started | |
| Idling Stop Rate |
Idling stop rate for one trip:
Total idling stop rate: |
Vehicle is frequently stopped | Idling stop rate has decreased due to vehicle being driven and engine idling | Always |
Tech Tips
*1: Read the Data List item "Integrated Current" or "Stop&Start Operating 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 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". (Usually, idling the engine for 5 to 60 minutes with the battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)
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.
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 engine hood is opened with the shift lever in D or M | The engine stops (mode changes to "stalled", and the engine cannot be restarted until the engine switch is turned off and then on (IG)) |
| The driver door is opened with the shift lever in D or M | The engine starts, warning buzzer sounds and stop and start indicator light blinks |
| The driver seat belt is unfastened | The engine starts |
WARNING INDICATOR AND BUZZER OPERATION
| *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.
| Item | Condition | Stop and start indicator light | Stop and start cancel indicator light | Buzzer |
|---|---|---|---|---|
| For 3 seconds after the engine switch on (IG) | 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 (integration control and panel 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 interval. | 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 interval. | Does not sound |
*: Shift lever in D or M
MULTI-INFORMATION DISPLAY MESSAGE AND INDICATOR OPERATION
An indicator and/or messages are displayed on the multi-information display to indicate condition of the stop and start system when certain vehicle conditions are met.
| Stop and Start System Condition | Multi-information Display Message* | Vehicle Condition | |
|---|---|---|---|
| When the engine cannot be stopped by the stop and start system | |
"Non-Dedicated Battery" | A non-specified battery for the stop and start system may have been installed. |
| "Battery Charging" |
|
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| "For Brake System" |
|
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| "For Climate Control" |
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| "Driver Seat Belt Unbuckled" | The driver seat belt is not fastened. | ||
| "Depress Brake Firmly to Activate" | The brake pedal is not depressed enough. | ||
| When the engine automatically restarts while stopped by the stop and start system | |
"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 furtheror pumped. | ||
| "For Climate Control" |
|
||
| "Battery Charging" | The battery charge amount may be low. | ||
| The system may be malfunctioning | - | "Stop & Start System Malfunction" "Visit Your Dealer" |
- |
Tech Tips
*: Messages are listed in the order of priority.
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 | P253014 | IG Switch | 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 | Stuck on | P085014 | Neutral Switch |
|
|
| Stuck off | P085012 | Neutral Switch |
|
||
| BNT1 (engine hood courtesy switch) circuit | Stuck on | - | Hood Courtesy Switch | Mode does not change to "stalled" when engine hood opened with shift lever in D or M and engine stopped by stop and start control |
|
| Stuck off | - | Hood Courtesy Switch | Stop and start control prohibited despite engine hood being closed | ||
| BRVC/PB/BRE2 (vacuum sensor) circuit | Open | P055515 | Brake Boost Pressure |
|
|
| Shorted |
|
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| Remains at intermediate value |
|
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| ECAN (stop and start system cancel switch (integration control and panel assembly)) circuit | Stuck on | - | Stop&Start Cancel Switch | Stop and start control prohibited |
|
| Stuck off | - | Stop&Start Cancel Switch | Stop and start control cannot be canceled by pressing the stop and start system cancel switch (integration control and panel assembly) | ||
| NOPM circuit OPM1 circuit OPO circuit (for 8AR-FTS: Automatic transaxle oil pump assembly with motor) (for 3ZR-FAE: CVT oil pump assembly with motor) |
|
|
|
|
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| Automatic transaxle oil pump assembly with motor (for 8AR-FTS) CVT oil pump assembly with motor (for 3ZR-FAE) |
Oil pump assembly with motor malfunction | P094296 | Stop&Start Operating Permission (AT/CVT) |
|
|
| STA circuit | Overcurrent | P061519 | - |
|
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| Stuck on | P164400 |
|
|||
| Stuck off | P164400 | ||||
| BBC (backup boost converter) circuit | Overcurrent | P323A19 | State of BBC |
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|
|
|
State of BBC |
|
|
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| Eco run vehicle converter assembly (external backup boost converter) circuit |
|
P33B300 |
|
|
|
| ECU inner circuit | Malfunction | P16449E | - |
|
Engine stop and start ECU |
| Monitoring CPU circuit | Malfunction | P060629 | State of BBC |
|
Engine stop and start ECU |
| EEPROM | Malfunction | P062F46 | EEPROM |
|
Engine stop and start ECU |
| Starter delay circuit | Malfunction | P161D9E | Starter Motor |
|
Engine stop and start ECU |
| 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 |
|
Stop and start control prohibited | SFI system |
| Abnormal NE signal | DTCs for SFI system output | - |
|
|
|
| Crankshaft reverse rotation detection | DTCs for SFI system output | - |
|
SFI system (crank position sensor circuit) | |
| Charging system | Battery state sensor assembly malfunction | Charging system DTCs output |
|
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 |
|
Stop and start control prohibited |
|
|
| Power steering system | Malfunction in power steering system | EPS assist current value invalid |
|
Stop and start control prohibited |
|
| Seat belt warning system | Malfunction in seat belt warning system | - | Driver Seat Belt Buckle Switch |
|
|
| Driver door courtesy light switch circuit | Malfunction in driver door courtesy light switch circuit | - | Driver Courtesy Switch Signal |
|
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| Air conditioning system | Malfunction in ambient temperature sensor | Air conditioning system DTCs output | Ambient Temperature | Stop and start control prohibited | Ambient temperature sensor circuit |
| Brake vacuum | Brake booster vacuum drops | - |
|
Stop and start control prohibited |
|
| Power source | Backup boost converter malfunction |
|
State of BBC |
|
|
| Charging system malfunction | - | Charging system malfunctions are displayed on the multi-information display | Stop and start control prohibited | Charging system | |
| Charging control abnormal | P160F00 | - |
|
Charging system | |
| Number of starter operations | Exceeds the specified limit | P154563 |
|
|
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| Starter signal malfunction | Signal does not match with the starter switch | P061562 |
|
|
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| Jump start | Engine started with the engine hood open | - | Stop&Start Operating Prohibition (Jump Start) | Stop and start control prohibited (permitted when the engine switch is turned off) |
|
| CAN communication | Communication interrupted |
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- |
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