STOP AND START: STOP AND START SYSTEM: SYSTEM DESCRIPTION; 2023 MY RAV4 [10/2022

Last Modified: 05-08-2025	6.11:8.1.0	Doc ID: RM100000002AFFU
Model Year Start: 2023	Model: RAV4	Prod Date Range: [10/2022 - 10/2023]
Title: STOP AND START: STOP AND START SYSTEM: SYSTEM DESCRIPTION; 2023 MY RAV4 [10/2022 - 10/2023]

SYSTEM DESCRIPTION

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.

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

Item		Condition (All of the following conditions are met)
Idle Stop	Ignition Switch	5 second or more have passed with the ignition switch ON
	Engine Coolant Temperature	40 to 105°C (104 to 221°F)
	Ambient Temperature	-5°C (23°F) or higher
	Driver Door	3 seconds have elapsed after driver door closed
	Driver Seat Belt	3 seconds have elapsed after driver seat belt fastened
	Electronically Controlled Brake 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*1	1.2 MPa or higher (12.2 kg/cm², 174 psi) (changes according to gradient)
	Shift Position	After shift lever is operated and 1 second elapses, shift lever is in P or D
	Drive Mode	NORMAL, ECO or SPORT mode
	Automatic Transaxle Fluid Temperature	25 to 112°C (77 to 234°F) Other than when stop and start control is prohibited due to insufficient automatic transaxle fluid pressure, etc.
	Stop and Start System Cancel Switch (Eco Run Cancel Switch Assembly)	Off (System control is not prohibited)
	Vehicle Speed	0 km/h (0 mph) (After the engine warms up and having run)
	Road Grade	-6 to 8°
	Engine Speed	1250 rpm or less
	Hood	3 seconds have elapsed after hood closed
	Battery Voltage	When using specified battery: 7.95 V or higher when starter begins operation and 7.62 V or higher when cranking When using non-specified battery: 8.92 V or higher when starter begins operation and 8.92 V or higher when cranking
	Battery Fluid Temperature*2	-10°C or higher and 70°C or less (14°F or higher and 158°F or less)
	Battery Integrated Current*3	One of the following conditions is met: -15444 A-sec or more: "Status of Battery Charge Control"4 is Charge Control Coordination Mode, Stop and Start Standalone Mode, Low Temperature Mode or Temperature High/Low Mode 0 A-sec or more: "Status of Battery Charge Control"4 is Stop and Start Restriction Mode
	Battery Charge Control*4	The value of Data List item Status of Battery Charge Control*4 is Charge Control Coordination Mode, Stop and Start Standalone Mode, Stop and Start Restriction Mode, Temperature High/Low Mode or Low Temperature Mode
	Idling Stop Rate / Total Idling Stop Rate	Idling stop rate for one trip: 50% or less (Varies according to battery fluid temperature). Total idling stop rate: Less than 40% HINT: Idling stop rate: Idling stop rate for ignition on time (1 trip) Total idling stop rate: Idling stop rate for total ignition on time
	Air Conditioning	Any of the following conditions are met: Defogger Switch: OFF, and Blower Switch: OFF With blower switch on, evaporator temperature below threshold (varies depending on each temperature, humidity, amount of solar radiation, etc.) and after certain period of time since engine restarted by stop and start system (threshold varies depending on idling stop conditions)
	Heater	One of the following conditions is met: Blower switch is off While blower switch is on and A/C switch is off, one of the following conditions is met: Ambient temperature is higher than 10°C, or Engine coolant temperature is higher than 55°C, or Vehicle cabin temperature is higher than the set temperature - 5°C While blower switch is on and A/C switch is off, a certain amount of time has elapsed after engine state changed from "not running" to "running".
	Cooler	One of the following conditions is met: Blower switch is off A/C switch is off Ambient temperature 23°C (73°F) or less Evaporator internal temperature less than 9°C (48°F), air mix damper opening value more than 10%, and vehicle cabin temperature less than 3°C (37°F) above set temperature or blower level less than 16 (when ignition switch turned to ON for first time in one trip)
	Steering Wheel	When the steerage angle of the steering wheel is 45 degrees or less.
	Engine Control	Engine catalytic warm up is completed Engine control learning has completed Automatic transmission control learning has completed
	Dynamic Radar Cruise Control System	When the dynamic radar cruise control (w/ Full Speed Range Following Function) system is operating and the brake hold function is operating, the preceding vehicle starts off or the user performs a resume operation (starts off the vehicle). When the condition is prohibited by radar cruise control

HINT:

*1: Enough brake force is applied to prevent the vehicle from moving when the engine is started again.
*2: 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.
*3: Read the Data List items "Integrated Current" and "Stop&Start Operating Permission (Integrated Current)" when checking the integrated current value.
Click here
*4: Please refer to the Data List "Status of Battery Charge Control" for information about the status of the battery charge control.

(b) 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 (Under 37.5 kPa (0.38 kg/ cm2, 5.4 psi)) (Brake booster vacuum changes in accordance with brake fluid pressure (brake pedal effort))
	SFI System	Malfunction in SFI system is detected
	Power Steering System	Malfunction in power steering system is detected
	Vehicle Stability Control System	Malfunction in vehicle stability control system is detected
	Oil Pump with Solenoid Assembly	Oil pump with solenoid assembly malfunctioning
	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: from OFF to ON A/C switch, blower switch: from OFF to ON Defogger switch: from OFF to ON During blower OFF and Auto control, when it changed to manual blower 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 (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 degrees or more
	Brake Master Cylinder Fluid Pressure	Brake master cylinder fluid pressure decreases (Brake pedal released)
	Accelerator Pedal	Accelerator pedal is depressed
	Shift Position	Move the shift lever from D to other position
	Stop and Start System Cancel Switch (Eco Run Cancel Switch Assembly)	When stop and start system cancel switch (eco run cancel switch assembly) turn from off to on
	Drive Mode	except ECO, NORMAL or SPORT mode
	Dynamic Radar Cruise Control System	When the dynamic radar cruise control (w/ Full Speed Range Following Function) system is operating and the brake hold function is operating, the preceding vehicle starts off or the user performs a resume operation (starts off the vehicle).

HINT:

*: Read the Data List items "Integrated Current" and "Stop&Start Operating Permission (Integrated Current)" when checking the integrated current value.
Click here

SYSTEM PROHIBITION CONTROL

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

System	Prohibition Condition	Vehicle State	Restoration Condition	Prohibition Condition Check Timing
Engine	Engine coolant temperature less than 40°C (104°F)	Engine has not warmed up	Engine coolant temperature 40 to 105°C (104 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 warm up	Engine catalytic warm up is being performed	Engine catalytic 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	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 permitted gradient range (vehicle front and rear road surface incline 8° or higher or -6° or lower)	Vehicle front and rear road surface incline 8° or higher or -6° or lower	Within the permitted gradient range (vehicle front and rear road surface incline within 8°/-6°)	Always
Air Conditioning	Heater: All of the following conditions are met: Blower switch is on Ambient temperature 10°C (50°F) or less One of the following conditions is met: Engine coolant temperature 55°C (131°F) or less Cabin temperature lower than set temperature by -5°C (-9°F) or less (only standard control (NORMAL) mode)	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, either of the following conditions is met: Evaporator temperature 9°C (48.2°F) or higher Cabin temperature higher than set temperature by 3°C (5°F) or higher, or blower level 16 or higher (only standard control (NORMAL) mode)	Cooling performance decreases	Any of the following condition shave been met: Actual temperature higher than target temperature Blower switch is off Air conditioning switch is off	While the air conditioning system (cooling function) is on
	Defogger: Both of the following conditions are met: Defogger switch on Blower switch on	Fogging of windows	Defogger switch or blower switch off	Always
	Temporary stop and start control: All of the following conditions are met: Blower switch on Evaporator temperature exceeds threshold (threshold varies with temperature, humidity and amount of solar radiation) Certain amount of time has elapsed after the engine is stopped by stop and start control (threshold value varies with stop and start operation conditions)	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	Automatic transaxle fluid temperature: Below 25°C (77°F) or 112°C (234°F) or higher	Automatic transaxle fluid temperature signal input	Permission automatic transaxle fluid temperature range reached	Always
Shift Position	Shift lever in other than D	Shift position signal input	Brake pedal depressed and shift lever in D	Always
Drive Mode	Drive mode is other than ECO, NORMAL and SPORT mode	Drive mode signal input	Drive mode is ECO, NORMAL and SPORT mode	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: Below 7.95 V when starter begins operation and below 7.62 V when cranking When using non-specified battery: Below 8.92 V when starter begins operation and below 8.92 V when cranking	Battery charge insufficient or battery has deteriorated	Battery charged or replaced* *: When prohibited, the prohibition condition continues until the ignition switch is turned off	Every time the engine is 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 current1 value meets one of the following conditions: -16434 A-sec or less: "Status of Battery Charge Control"2 is Charge Control Coordination Mode, Stop and Start Standalone Mode, Low Temperature Mode or Temperature High/Low Mode -990 A-sec or less: "Status of Battery Charge Control"*2 is Stop and Start Restriction Mode	Heavy electrical load High stop and start rate (Time that engine stopped by stop and start control is long)	Battery integrated current1 value meets one of the following conditions: -15444 A-sec or higher: "Status of Battery Charge Control"2 is Charge Control Coordination Mode, Stop and Start Standalone Mode, Low Temperature Mode or Temperature High/Low Mode 0 A-sec or higher: "Status of Battery Charge Control"*2 is Stop and Start Restriction Mode	Always
	During refresh charge	Cable reconnected to battery terminal Refresh charge is performed for 30 minutes or more for every 30 hours of driving	Cable reconnected to battery terminal: 5 to 60 minutes Periodic refresh charge: 30 to 60 minutes	Always
	Engine started with the engine hood open	-	After ignition switch is turned off, ignition switch is turned to ON with hood closed	Every time the engine is started
Idling Stop Rate	Idling stop rate for one trip: Battery fluid temperature 3°C (37°F) or higher: more than 50% Battery fluid temperature 0 to 3°C (32 to 37°F): more than [(25 / 3) x Battery fluid temperature (°C) + 25]% Battery fluid temperature less than 0°C (32°F): more than (Battery fluid temperature (°C) + 25)% Total idling stop rate: more than 40%	Vehicle is frequently stopped	Idling stop rate has decreased due to vehicle being driven and engine idling	Always

HINT:

*1: Read the Data List items "Integrated Current" and "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 (51°F) or higher, the refresh charge will be completed.)
If the Techstream 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 ignition 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	The engine stops (mode changes to "stalled", and the engine cannot be restarted until the ignition switch is turned off and then to ON)
The driver door is opened with the shift lever in D	The engine starts, warning buzzer sounds and stop and start indicator blinks
The driver seat belt is unfastened	The engine starts

WARNING INDICATOR AND BUZZER OPERATION

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

Stop and Start Indicator and Buzzer Operation

Item	Condition	Stop and Start Indicator	Stop and Start Cancel Indicator	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
During stop and start control operation (engine is stopped)	Driver door opened	The blinking interval 0.3 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 0.3 seconds*	Does not come on	Sounds*
Control is prohibited by the stop and start system cancel switch (eco run 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	The blinking interval 1 second	Does not sound
Starter assembly life	Number of times the starter has been operated exceeds its limit	Does not come on	The blinking interval 1 second	Does not sound

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

*: Shift lever in D

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*1		Vehicle Condition
When the engine cannot be stopped by the stop and start system	*2	"Non-Dedicated Battery"	A non-specified battery for the stop and start system may have been installed.
		"Battery Charging"	The battery charge amount may be low. A refresh charge may be occurring.
		"Stop & Start System Unavailable"	The Stop & Start System is temporarily disabled. The engine may have been started with the hood opened.
		"In Preparation"	The vehicle is being driven in a high altitude area. The brake booster vacuum is low.
		"For Climate Control"	The air conditioning system is being used when the ambient temperature is high or low. Windshield defogger is pressed.
		"Press Brake More to Active"	The brake pedal is not depressed enough.
When the engine automatically restarts while stopped by the stop and start system	*2	"In Preparation"	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.
The system may be malfunctioning	-	"Stop & Start System Malfunction Visit Your Dealer"	-

HINT:

*1: Messages are listed in the order of priority.
*2: 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 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
IG2 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	Stop and start control prohibited Stop and start cancel indicator blinks	Wire harness or connector Park/Neutral position switch assembly
CLL (park/neutral position switch assembly) circuit	Stuck off	P085012	Neutral Switch	Stop and start control prohibited Stop and start cancel indicator blinks
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 and engine stopped by stop and start control	Wire harness or connector Engine hood courtesy switch (hood lock assembly)
BNT1 (engine hood courtesy switch) circuit	Stuck off	-	Hood Courtesy Switch	Stop and start control prohibited despite engine hood being closed
ECAN (stop and start system cancel switch (eco run cancel switch assembly)) circuit	Stuck on	-	Stop&Start Cancel Switch	Stop and start control prohibited	Wire harness or connector Stop and start system cancel switch (eco run cancel switch assembly)
	Stuck off	-	Stop&Start Cancel Switch	Stop and start control cannot be canceled by pressing the stop and start system cancel switch (eco run cancel switch assembly)
BRVC/PB/BRE2 (vacuum sensor) circuit	Open	P055515	Brake Boost Pressure	Stop and start control prohibited Stop and start cancel indicator blinks	Wire harness or connector Vacuum sensor assembly Brake booster assembly Vacuum hose
	Shorted	P055511 P055515
	Remains at intermediate value	P055500 P05552A
EMOP circuit EGND circuit (Oil pump with solenoid assembly)	Open Shorted Internal circuit malfunction	P279612 P279614 P279796	Oil Pump Relay Stop&Start Operating Permission (Electromagnetic Oil Pump)	Stop and start control prohibited Stop and start cancel indicator blinks	Wire harness or connector Transmission wire Engine stop and start ECU Electromagnetic oil pump Engine stop and start solenoid filter
Oil pump with solenoid assembly	Oil pump with solenoid assembly malfunction	P094296	Stop&Start Operating Permission (AT/CVT)	Stop and start control prohibited Stop and start cancel indicator blinks	Oil pump with solenoid assembly
STA circuit	Overcurrent	P061519	-	Stop and start control prohibited Stop and start cancel indicator blinks	BBC NO. 1 fuse BBC NO. 2 fuse Wire harness or connector ST NO. 1 relay Engine stop and start ECU
	Stuck on	P164400			Wire harness or connector ST NO. 1 relay Engine stop and start ECU
	Stuck off	P164400
BBC (backup boost converter) circuit	Overcurrent	P323A19	State of BBC	Stop and start control prohibited Stop and start cancel indicator blinks	BBC NO. 1 fuse BBC NO. 2 fuse Wire harness or connector Engine stop and start ECU Battery ECUs and sensors connected to B41, B42, B43, IG41 and EMOP
BBC (backup boost converter) circuit	Open Shorted Internal circuit malfunction Battery	P30DF62 P30EF4B P323A00 P323A16 P323AA2 P323B29 P323B38	State of BBC	Stop and start control prohibited Stop and start cancel indicator blinks	BBC NO. 1 fuse BBC NO. 2 fuse Wire harness or connector Engine stop and start ECU Battery
ECU inner circuit	Malfunction	P16449E	-	Stop and start control prohibited Stop and start cancel indicator blinks	Engine stop and start ECU
Monitoring CPU circuit	Malfunction	P060629	State of BBC	Stop and start control prohibited Stop and start cancel indicator blinks	Engine stop and start ECU
EEPROM	Malfunction	P062F46	-	Stop and start control prohibited Stop and start cancel indicator 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
SFI system	MIL illuminated	DTCs for SFI system output	Stop&Start Operating Permission (ECM 1) Stop&Start Operating Permission (ECM 2)	Stop and start control prohibited	SFI system
	Abnormal NE signal	DTCs for SFI system output	-	Stop and start control prohibited Stop and start cancel indicator blinks	SFI system (crankshaft position sensor circuit) Wire harness or connector
	Crankshaft reverse rotation detection	DTCs for SFI system output	-	Stop and start control prohibited MIL illuminated	SFI system (crankshaft position sensor circuit)
Charging system	Battery state sensor assembly malfunction	Charging system DTCs output	Battery Fluid Temperature Integrated Current	Stop and start control prohibited	Charging system
Vehicle stability control system	Vehicle stability control running	-	ABS Running	Stop and start control prohibited	-
Vehicle stability control system	Malfunction in wheel speed sensor	Brake control system DTCs output	Vehicle Speed 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 EPS Assist Current Available	Stop and start control prohibited	Power steering ECU (Rack and pinion power steering gear assembly) Torque sensor
Seat belt warning system	Malfunction in seat belt warning system	-	Driver Seat Belt Buckle Switch	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 LH Wire harness or connector
Driver door courtesy light switch circuit	Malfunction in driver door courtesy light switch circuit	-	Driver 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 Temperature	Stop and start control prohibited	Ambient temperature sensor circuit
Brake vacuum	Brake booster vacuum drops	-	Brake Boost Pressure Brake Negative Pressure	Stop and start control prohibited	Brake booster assembly vacuum Brake booster assembly Vacuum sensor assembly Vacuum hose
Power source	Backup boost converter malfunction	P30DF62 P30EF4B P323A00 P323A16 P323AA2 P323B29 P323B38	State of BBC	Stop and start control prohibited Stop and start cancel indicator blinks	BBC NO. 1 fuse BBC NO. 2 fuse Wire harness or connector Engine stop and start ECU Battery
	Charging system malfunction	-	-*	Stop and start control prohibited	Charging system
	Charging control system	P160F00	-	Stop and start control prohibited Stop and start cancel indicator blinks	Charging system
Number of starter operations	Exceeds the specified limit	P154563	Starter Operation # Number of Engine Starts (IG-ON) Number of Engine Starts (Stop & Start)	Stop and start control prohibited Stop and start cancel indicator blinks	Starter assembly replacement is required ST NO. 1 relay replacement is required Fuse replacement is required
Starter signal malfunction	Signal does not match with the starter switch	P061562	Starter Starter Motor Engine Starter Signal	Stop and start control prohibited Stop and start cancel indicator blinks	Wire harness or connector Engine stop and start ECU
Jump start	Engine started with the engine hood open	-	Stop&Start Operating Prohibition (Jump Start)	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	U010087 U012687 U012987 U013187 U014087 U015187 U016487 U023A87 U111087	-	Stop and start control prohibited Stop and start cancel indicator blinks	Applicable wire harness or connector Applicable ECU

*: Check for any malfunctions in the charging system on the multi-information display

SYSTEM DESCRIPTION

When using specified battery:

When using non-specified battery:

One of the following conditions is met:

Any of the following conditions are met:

One of the following conditions is met:

One of the following conditions is met:

Both of the following conditions are met:

Any of the following conditions are met: from OFF to ON

All of the following conditions are met:

When blower switch and A/C switch is on and ambient temperature 23°C (73.4°F) or higher, either of the following conditions is met:

Any of the following condition shave been met:

Both of the following conditions are met:

All of the following conditions are met:

When using specified battery:

When using non-specified battery:

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

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

Idling stop rate for one trip:

Total idling stop rate:

Stop and Start Indicator and Buzzer Operation

Effects on Vehicle due to Related System Malfunctions