STOP AND START: STOP AND START SYSTEM: Stop and Start System does not Operate; 2024 MY RAV4 [10/2023

Last Modified: 01-30-2024	6.11:8.1.0	Doc ID: RM100000002EM9Q
Model Year Start: 2024	Model: RAV4	Prod Date Range: [10/2023 - ]
Title: STOP AND START: STOP AND START SYSTEM: Stop and Start System does not Operate; 2024 MY RAV4 [10/2023 - ]

Stop and Start System does not Operate

DESCRIPTION

This procedure is for when the stop and start system does not operate.
Regarding explanations of the features of stop and start system control:
Click here

PROCEDURE

1.	STOP AND START SYSTEM OPERATION CHECK

(a) Check if the stop and start system operates.

Click here

OPERATES

END (Explain to the customer that the problem could not be reproduced)

DOES NOT OPERATE

2.	CHECK VEHICLE CONDITIONS (DRIVER OPERATION)

(a) Check if the stop and start operation conditions (driver operation) are met.

(1) The driver seat belt is fastened.

(2) The stop and start system cancel switch (electric parking brake switch assembly) has not been pressed. (Stop and start cancel indicator light is not illuminated)

(3) The driver door is closed.

GO TO STEP 4

3.	STOP AND START SYSTEM OPERATION CHECK (DRIVER OPERATION)

(a) Ensure the stop and start operation conditions (driver operation) are met, and check if the stop and start system operates.

(1) The driver seat belt is fastened.

(2) The stop and start system cancel switch (electric parking brake switch assembly) has not been pressed. (Stop and start cancel indicator light is not illuminated)

(3) The driver door is closed.

(b) Check if the stop and start system operates.

Click here

OPERATES

END (Explain to the customer that the problem could not be reproduced)

DOES NOT OPERATE

4.	CHECK VEHICLE CONDITIONS (ENGINE HOOD STATE)

(a) Check the engine hood.

(1) The engine hood is not open.

(2) The engine was not started with the engine hood open. (jump stated, etc.)

GO TO STEP 9

5.	STOP AND START SYSTEM OPERATION CHECK (ENGINE HOOD STATE)

(a) Close the engine hood, turn the ignition switch off, wait 30 seconds or more, then start the engine.

(b) Check if the stop and start system operates.

Click here

OPERATES

END (Engine hood was open or vehicle was jump started)

DOES NOT OPERATE

6.	READ VEHICLE CONTROL HISTORY

(a) Enter the following menus: Powertrain / Stop and Start / Utility / Vehicle Control History.

Powertrain > Stop and Start > Utility

Tester Display
Vehicle Control History (RoB)

HINT:

It is also possible to display vehicle control history during the Health Check, if "Store All Data" is selected.

(b) Confirm if any data relating to the problem symptoms exist in the Vehicle Control History.

Vehicle Control History

Note

Suspected Area

Proceed to

Life Cycle of Starter is stored

(Vehicle Control History Code: X0877)

Data list item Starter Operation # is 324000 or more

(Displays 1000000 or more)*

HINT:

*: If "Starter Operation #" displays 1000000 or more, it is necessary to replace the engine stop and start ECU as there is an internal malfunction in the ECU.

Starter assembly
Engine stop and start ECU

The malfunction is not currently occurring and there is no Vehicle Control History related to the problem symptoms stated by the customer.

GO TO STEP 9

7.	READ VALUE USING GTS (STARTER OPERATION #)

(a) Enter the following menus: Powertrain / Stop and Start / Data List / Starter Operation #.

(b) According to the display on the GTS, read the Data List.

Powertrain > Stop and Start > Data List

Tester Display
Starter Operation #

Result

Proceed to

324000 or more

(Displays 1000000 or more)*

Below 324000

HINT:

*: If "Starter Operation #" displays 1000000 or more, it is necessary to replace the engine stop and start ECU as there is an internal malfunction in the ECU.

CLEAR VEHICLE CONTROL HISTORY

8.	REPLACE STARTER ASSEMBLY

(a) Replace the starter assembly

Click here

HINT:

When the starter assembly is replaced, "ST NO. 1 relay" must be also replaced.
If "Starter Operation #" displays 1000000 or more, the engine stop and start ECU must also be replaced.
Click here
Clear the number of starter operations by performing "Starter Exchange" using the GTS.
Click here

CLEAR VEHICLE CONTROL HISTORY

9.	CHECK FOR DTC

(a) Enter the following menus:

Stop and start system: Powertrain / Stop and Start / Trouble Codes.
SFI system: Powertrain / Engine / Trouble Codes.
Automatic transmission system: Powertrain / Transmission / Trouble Codes.
Electronically controlled brake system: Chassis / Brake Booster / Trouble Codes.

(b) Read the DTCs.

Powertrain > Stop and Start > Trouble Codes

Powertrain > Engine > Trouble Codes

Powertrain > Transmission > Trouble Codes

Chassis > Brake Booster > Trouble Codes

Result	Proceed to
Stop and start system DTCs are output	A
SFI system DTCs are output	B
Automatic transmission system DTCs are output	C
Electronically controlled brake system DTCs are output	D
DTCs are not output	E

HINT:

When it is suspected that the stop and start system is malfunctioning, "Stop and start system failure" is displayed on the multi-information display.

GO TO DTC CHART

GO TO SFI SYSTEM

GO TO AUTOMATIC TRANSMISSION SYSTEM

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

10.	CHECK MULTI-INFORMATION DISPLAY

(a) Check that there are no stop and start system operation restriction messages displayed on the multi-information display.

Click here

NOT DISPLAYED

GO TO STEP 12

DISPLAYED

11.	CHECK VEHICLE CONDITIONS (MULTI-INFORMATION DISPLAY)

(a) After resolving the problem indicated by the stop and start system operation restriction message on the multi-information display, check if the stop and start system operates.

HINT:

Depending on the vehicle, some of the items are not displayed.

	Possible Cause / (Action to be Taken)	Related Data List Item If Problem Not Resolved
"Non-Dedicated Battery"	A non-specified battery for the stop and start system may have been installed. (If a non-specified battery is installed, operation of the stop and start system may be restricted.) HINT: If a battery that meets specifications is installed, perform Battery Type Setting. Refer to Battery Type Setting.	Stop&Start Operating Permission (Power Management) Battery Type
"Battery Charging"	The battery charge amount may be low. (With the engine running, wait for battery charging priority to end as idling stop is temporarily suspended due to battery charging priority.) A refresh charge may be occurring. (Wait approximately 5 to 60 minutes for the refresh charge to complete, which may occur during periodic charging after the battery was replaced or the cable was disconnected from the battery terminal.)	Stop&Start Operating Permission (Power Management)
"Stop & Start Unavailable"	Idling stop is temporarily suspended. (With the engine running, wait for battery charging priority to end.) The engine may have been started with the hood opened. (With the engine hood closed, wait for 30 seconds after turning the ignition switch off, and then start the engine.)	Stop&Start Operating Permission (AT/CVT) Stop&Start Operating Permission (AT/CVT 2) Stop&Start Operating Permission (ECM 1) Stop&Start Operating Permission (ECM 2) Stop&Start Operating Permission (ABS/VSC) Stop&Start Operating Permission (ABS/VSC 2) Stop&Start Operating Permission (Interval For Starter) Stop&Start Operating Prohibition (Jump Start)
"For Climate Control"	The air conditioning system is being used when the ambient temperature is high or low. (Set the air conditioning system temperature to be approximately equivalent to the ambient air temperature and check that the stop and start system operates.) Windshield defogger is pressed.	Stop&Start Operating Permission (A/C)
"Press Brake More to Activate"	The brake pedal is not depressed enough. (Sufficiently depress the brake pedal.)	Stop&Start Operating Prohibition (Master Cylinder pressure)
Stop & Start System Active Shift to N and Press Clutch to Restart	The shift lever has been shifted from neutral to another position with the clutch pedal released.	Stop&Start Operating Permission (Clutch)
In Preparation	The brake booster load decreased. (Wait for the vacuum in the brake booster to restore and check that the stop and start system operates.) The vehicle is operated at a high elevation.	Stop&Start Operating Permission (Brake Negative Pressure)

(b) Check if the stop and start system operates.

OPERATES

END (Explain to the customer that the problem could not be reproduced)

DOES NOT OPERATE

GO TO STEP 12

12.	READ VALUE USING GTS (PERMISSION STATUS AND NUMBER OF OPERATION PROHIBITIONS)

(a) Enter the following menus: Powertrain / Stop and Start / Data List.

(b) Check if any Data List item in one of the following tables is indicating a value that prohibits engine stop, and proceed to the indicated step.

HINT:

If no Data List items are currently prohibiting stop and start operation, perform troubleshooting for the Data List item with the highest number of prohibitions.
Depending on the vehicle, some of the items are not displayed.

Engine/AT/CVT:

Tester Display	Measurement Item	Proceed to
Stop&Start Operating Permission (AT/CVT)	Permission of stop and start automatic transmission system	A
Number of Stop&Start Operating Prohibition (AT/CVT 2)	Permission of stop and start automatic transmission system
Stop&Start Operating Permission (AT/CVT 2)	Permission of stop and start control by automatic transmission system
Number of Stop&Start Operating Prohibition (AT/CVT 1)
Stop&Start Operating Permission (ECM 1)	Permission of stop and start control by the ECM Permission of stop and start control based on engine coolant temperature, learning (A/F, ISC), etc.
Number of Stop&Start Operating Prohibition (ECM 2)
Stop&Start Operating Permission (ECM 2)	Prohibition of stop and start control based on the engine fuel-cut prohibition signal
Number of Stop&Start Operating Prohibition (Engine F/C)

Battery Condition:

Tester Display	Measurement Item	Proceed to
Stop&Start Operating Permission (Power Management)	Permission of stop and start control based on the battery conditions	B
Number of Stop&Start Operating Prohibition (Power Management)		B

Vehicle Operation:

Tester Display	Measurement Item	Proceed to
Stop&Start Operating Permission (A/C)	Permission of stop and start control based on the air conditioning conditions	C
Number of Stop&Start Operating Prohibition (A/C)
Stop&Start Operating Permission (Master Cylinder Pressure)	Permission of stop and start control based on the brake booster vacuum conditions
Stop&Start Operating Permission (Brake Negative Pressure)	Permission of stop and start control based on the brake booster vacuum conditions HINT: Not applicable to vehicles without vacuum brake booster.
Number of Stop&Start Operating Prohibition (Brake Negative Pressure)
Stop&Start Operating Permission (Engine Hood Closed)	Permission of stop and start control based on the engine hood open/close conditions
Number of Stop&Start Operating Prohibition (Engine Hood Closed)
Stop&Start Operating Prohibition (Jump Start)	Prohibition of stop and start control based on the jump start conditions
Number of Stop&Start Operating Prohibition (Jump Start)
Stop&Start Operating Permission (Driver Side Buckle SW)	Permission of stop and start control based on the driver seat belt condition
Number of Stop&Start Operating Prohibition (Driver Side Buckle SW)
Stop&Start Operating Permission (Driver Door Closed)	Permission of stop and start control based on the driver door open/close conditions
Number of Stop&Start Operating Prohibition (Driver Door Closed)
Stop&Start Operating Permission (Cancel Switch)	Permission of stop and start control based on the Stop and start system cancel switch (electric parking brake switch assembly) operation
Number of Stop&Start Operating Prohibition (Cancel Switch)
Stop&Start Operating Permission (Ambient Temperature)	Permission of stop and start control based on the ambient temperature condition
Number of Stop&Start Operating Prohibition (Ambient Temperature)
Stop&Start Operating Permission (Road Surface Gradient)	Permission of stop and start control based on the road grade conditions
Number of Stop&Start Operating Prohibition (Road Surface Gradient)
Number of Stop&Start Operating Prohibition (Deceleration Sensor Abnormal)
Stop&Start Operating Permission (After Running)	Permission of stop and start control based on the initial trip conditions after the ignition switch is turned to ON. (Operation permission is maintained until the ignition switch is turned off.)
Number of Stop&Start Operating Prohibition (After Running)
Stop&Start Operating Permission (Vehicle Speed)	Permission of stop and start control based on the vehicle speed conditions
Stop&Start Operating Permission (Idling Stop Performance Waiting Time)	Permission of stop and start control based on the engine running time conditions
Number of Stop&Start Operating Prohibition (Interval)
Stop&Start Operating Permission (Interval For Starter)	Permission of stop and start based on starter motor operating time
Number of Stop&Start Operating Prohibition (Interval For Starter)
Stop&Start Operating Permission (Starter Check Complete)	Permission of stop and start control based on the starter circuit self-check result HINT: Value changes to NG when the engine is stopped by the stop and start system, and when the vehicle speed is 15 km/h (9 mph) or more.
Number of Stop&Start Operating Prohibition (Starter Check Complete)
Stop&Start Operating Permission (Inspected Oil Pump)	Permission of stop and start control based on oil pump assembly with motor condition HINT: An energization inspection of the electromagnetic oil pump is performed just before the vehicle is stopped. If operation is normal, OK is displayed. NG is displayed when the vehicle starts off.
Stop&Start Operating Permission (Electromagnetic Oil Pump)	Permission of stop and start control based on electromagnetic oil pump condition HINT: Electromagnetic oil pump preliminary check status
Stop&Start Operating Permission (Discharged Oil Pump Air)	Permission of stop and start control based on preliminary check of oil pump assembly with motor
Stop&Start Operating Permission (Steering)	Permission of stop and start control by power steering system
Number of Stop&Start Operating Prohibition (Steering)
Stop&Start Operating Permission (Shift D Position)	Permission of stop and start control based on shift lever position (D) HINT: Only when the shift range is a drive range.
Stop&Start Operating Permission (No Shift Operation)	Permission of stop and start control based on shift lever operation condition
Number of Stop&Start Operating Prohibition (No Shift Operation)
Stop&Start Operating Permission (Idling)	Permission of stop and start control based on the engine idle conditions
Number of Stop&Start Operating Prohibition (Idling)
Stop&Start Operating Permission (Key Operation)	Permission of stop and start control based on the ignition switch operation
Number of Stop&Start Operating Prohibition (Key Operation)
Stop&Start Operating Permission (Elapsed Time After IG-ON)	Permission of stop and start control based on the ignition switch operation
Number of Stop&Start Operating Prohibition (Elapsed Time After IG-ON)
Stop&Start Operating Permission (DTC)	Permission of stop and start control based on the DTC output conditions
Number of Stop&Start Operating Prohibition (DTC)
Stop&Start Precondition	All of the listed items of Stop & Start precondition are met: Oper Permission (ECM1, Power Management, ABS/VSC, ABS/VSC 2, Elapsed Time After IG-ON, DTC, A/C, Idling Stop Performance Waiting Time, After Running, Engine Hood Closed, Driver Door Closed, Cancel Switch, Interval For Starter, AT/CVT, AT/CVT2, Key Operation, Driver Side Buckle SW, etc.)
Stop&Start Precondition 2	All of the listed items of Stop & Start precondition 2 are met: Oper Permission (Idling, Road Surface Gradient, No Shift Operation, Brake Negative Pressure, Steering, Inspected Oil Pump, Starter Check Complete, etc.)

Other Systems:

Tester Display	Measurement Item	Proceed to
Stop&Start Operating Permission (4WD and Rear Differential Lock)	Permission of stop and start based on drive mode (rear differential lock, SPORT, snow mode, etc.)	D
Number of Stop&Start Operating Prohibition (4WD and Rear Differential Lock)
Stop&Start Operating Permission (ACC)	Permission of stop and start control by dynamic radar cruise control system
Number of Stop&Start Operating Prohibition (ACC)
Stop&Start Operating Permission (IPA)	Permission of stop and start control by advanced park
Number of Stop&Start Operating Prohibition (IPA)	Permission of stop and start control by advanced park
Stop&Start Operating Permission (Welcab)	Permission of stop and start control by side lift up seat system
Number of Stop&Start Operating Prohibition (Welcab)
Stop&Start Operating Permission (Air Suspension)	Permission of stop and start control by air suspension system
Number of Stop&Start Operating Prohibition (Air Suspension)

Brake System:

Tester Display	Measurement Item	Proceed to
Stop&Start Operating Permission (Brake Master Pressure 0 Point Correction)	Permission of stop and start control due to completion of brake master cylinder pressure zero point calibration	E
Number of Stop&Start Operating Prohibition (Brake Master Pressure 0 Pt Calibration Incomplete)
Stop&Start Operating Permission (ABS/VSC)	Permission of stop and start control by vehicle stability control system
Number of Stop&Start Operating Prohibition (ABS/VSC 1)
Stop&Start Operating Permission (ABS/VSC 2)
Wheel Speed Malfunction	Wheel speed sensor malfunction status
Number of Stop&Start Operating Prohibition (Abnormal Wheel Speed Sensor Inputs)	Wheel speed sensor malfunction status

Transmission Switch:

Tester Display	Measurement Item	Proceed to
Stop&Start Operating Permission (Shift Position)	Permission of stop and start based on shift operation history Changes from permission to no permission on the next stop and start operation	F
Stop&Start Operating Permission (Clutch)	Permission of stop and start based on clutch pedal operation history
Stop&Start Operating Permission (Neutral Switch)	Permission of stop and start control based on the park/neutral position switch assembly conditions HINT: Only applicable to manual transmission vehicles with stop and start system when the shift state is P or N.
N/Clutch Lower Switch Malfunction	Prohibition of stop and start based on neutral switch off malfunction, or clutch upper switch on malfunction
N/Clutch Upper Switch Malfunction	Prohibition of stop and start based on neutral switch on malfunction, or clutch upper switch on malfunction
Stop&Start Operating Prohibition (Manual Start for the First Time)	Prohibition of stop and start based on manual start after engine stall (except for engine stop by the stop and start system) HINT: If prohibited, engine stop by the stop and start system remains prohibited until the ignition switch is turned off.
Number of Stop&Start Operating Prohibition (Manual Start for the First Time)
Stop&Start Operating Permission (Manual Start)	Permission of stop and start based on manual start after the engine is stopped by the stop and start system HINT: If prohibited, engine stop by the stop and start system remains prohibited until the ignition switch is turned off.

13.	CHECK VEHICLE CONDITIONS (ENGINE/AT/CVT)

(a) Based on the respective Data List item, ensure the operation permission conditions are met.

HINT:

Depending on the vehicle, some of the items are not displayed.

Stop&Start Operating Permission (AT/CVT)

Item to Check or Action to be Taken	Conditions Required for Permission
Confirm that the automatic transmission fluid temperature is within the specified range and check that the stop and start system operates.	Powertrain / Transmission / Data List / A/T Oil Temperature No. 1 (Standard: 25°C (77°F) or higher and less than 110°C (230°F))
Check for automatic transmission system DTCs.	DTCs are not output.
Oil pump with motor assembly	-
ECM (or transmission control ECU)	-

Stop&Start Operating Permission (AT/CVT 2)

Item to Check or Action to be Taken	Conditions Required for Permission
Confirm that AT/CVT learning is complete. HINT: Refer to Initialization for how to perform AT/CVT learning.	Powertrain / Transmission / Data List / CVT Oil Press Calibration (Compl: CVT oil pressure calibration is complete)
Confirm that the vehicle is not stopped via sudden braking.	(When the vehicle is stopped via sudden braking, the transmission may prohibit operation of the stop and start system.)
Check for automatic transmission system DTCs.	DTCs are not output.
Oil pump with motor assembly	-
ECM (or transmission control ECU)	-

Stop&Start Operating Permission (ECM 1)

Item to Check or Action to be Taken	Conditions Required for Permission
Confirm the engine coolant temperature. Start the engine and wait for the engine coolant temperature to reach the standard operating range (5 to 60 minutes).	Powertrain / Engine / Data List / Engine coolant temperature (Standard: 50°C (122°F) or higher and less than 115°C (239°F))
Confirm that engine learning is complete (A/F, ISC). HINT: Refer to Initialization for how to perform engine learning.	Powertrain / Engine / Data List / Engine speed (Standard: Refer to Initialization.)
Check for SFI system DTCs.	DTCs are not output.
ECM (or transmission control ECU)	-

GO TO STEP 19

14.	GO TO STOP AND START SYSTEM DOES NOT OPERATE (BATTERY CONDITION)

(a) Perform Stop and Start System does not Operate (Battery Condition).

Click here

GO TO STEP 19

15.	CHECK VEHICLE CONDITIONS (VEHICLE OPERATION)

(a) Based on the respective Data List item, ensure the operation permission conditions are met.

HINT:

Depending on the vehicle, some of the items are not displayed.

Stop&Start Operating Permission (A/C)

Item to Check or Action to be Taken

Conditions Required for Permission

Set the air conditioning system temperature to be approximately equivalent to the ambient temperature.
Front defroster is turned off
Turn off the blower switch and A/C switch, and then confirm that Data List item "Stop&Start Operating Permission (A/C)" indicates a value which permits engine stop by the stop and start system.
Confirm the air conditioning system conditions required for the stop and start system to operate are set.

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 are met:

Blower Switch: OFF
Blower Switch: ON, and A/C Switch: OFF
(Ambient temperature higher than 10°C (50°F), engine coolant temperature higher than 55°C (131°F), or vehicle cabin temperature higher than -5°C (23°F) lower than the set temperature)
Blower Switch: ON, and A/C Switch: OFF
(after certain period of time since engine restarted by stop and start system)
Malfunction in Air Conditioning System is detected

Cooler:

One of the following conditions are met:

Blower Switch: OFF
A/C switch: 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)
Malfunction in Air Conditioning System is detected

Stop&Start Operating Permission (Master Cylinder Pressure)

Item to Check or Action to be Taken

Conditions Required for Permission

Further depress the brake pedal.
Confirm that the master cylinder pressure value is above the threshold.

Data List / Master Cylinder Pressure*

(Standard: 1.1 MPa or higher (11.2 kg/cm², 276 psi) (changes according to gradient)

HINT:

*: w/ Vacuum Brake Booster
w/o Vacuum Brake Booster: Refer to the threshold of "Driver Operation Control Torque".

Stop&Start Operating Permission (Brake Negative Pressure)

Item to Check or Action to be Taken

Conditions Required for Permission

Drive the vehicle until the vacuum of the brake booster restores to above the threshold and check that the stop and start system operates.
If the vehicle is at a high altitude, confirm operation at a lower altitude.
Brake booster assembly

Data List / Brake Negative Pressure

(Standard: In a level area, 42.5 kPa (0.43 kg/cm², 6.1 psi) or more (brake booster vacuum changes in accordance with brake fluid pressure) for 1 second or more.)

Stop&Start Operating Permission (Engine Hood Closed)

Item to Check or Action to be Taken

Conditions Required for Permission

Close the engine hood.

Data List / Hood Courtesy Switch

(ON: 3 seconds have elapsed after engine hood closed)

HINT:

If the Data List value does not change even when the engine hood is closed, refer to Engine Hood Courtesy Switch Circuit.

Click here

Stop&Start Operating Prohibition (Jump Start)

Item to Check or Action to be Taken

Conditions Required for Permission

Close the engine hood , turn the ignition switch off, wait 30 seconds or more, then start the engine.

Data List / Hood Courtesy Switch

(ON: With the engine hood closed, wait for 30 seconds after turning the ignition switch off, and then start the engine)

HINT:

If the Data List value does not change even when the engine hood is closed, refer to Engine Hood Courtesy Switch Circuit.

Click here

Stop&Start Operating Permission (Driver Side Buckle SW)

Item to Check or Action to be Taken

Conditions Required for Permission

Fasten the driver seat belt.

Data List / Driver Seat Belt Buckle Switch

(ON: Seat belt is fastened)

Confirm that DTC U015587 Lost Communication with Instrument Panel Cluster (IPC) Control Module is not output.

DTCs are not output.

Front seat inner belt assembly (for driver side)

Stop&Start Operating Permission (Driver Door Closed)

Item to Check or Action to be Taken

Conditions Required for Permission

Check that the driver door is closed.

Data List / Driver Courtesy Switch Signal

(OFF: 3 seconds have elapsed after driver door closed)

Confirm that DTC U014087 Lost Communication with main body ECU (Multiplex network body ECU) is not output.

HINT:

Depending on the vehicle, confirm that DTC U015187 (Lost Communication with airbag sensor assembly) is not output because the signal for Data List item "D Courtesy Switch Signal" is sent from the airbag sensor assembly.

DTCs are not output.

Driver door courtesy switch circuit

Stop&Start Operating Permission (Cancel Switch)

Item to Check or Action to be Taken

Conditions Required for Permission

Press the stop and start system cancel switch (electric parking brake switch assembly) to turn off the stop and start cancel indicator light.

Data List / Stop&Start Cancel Switch

(OFF: Stop and start system cancel switch (electric parking brake switch assembly) not pressed)

HINT:

If the value of the Data List item does not change when the stop and start system cancel switch (electric parking brake switch assembly) is pressed, refer to Stop and Start Cancel Switch Circuit.

Click here

Stop&Start Operating Permission (Ambient Temperature)

Item to Check or Action to be Taken

Conditions Required for Permission

Confirm the ambient temperature.

Data List / Ambient Temp Sensor

(Standard: Higher than -5°C (23°F))

Ambient temperature sensor

Stop&Start Operating Permission (Road Surface Gradient) / Stop&Start Operating Permission (Deceleration Sensor Abnormal)

Item to Check or Action to be Taken

Conditions Required for Permission

Stop the vehicle on a road surface that does not have a steep gradient.

Data List / Gradient of Road Surface

(Standard: Gradient of road surface is within the range required for stop and start to operate (-1.02 m/s² to 1.36 m/s²))

Deceleration sensor zero point not calibrated.

HINT:

Refer to Registration for how to calibrate the zero point of the deceleration sensor.

Data List / Deceleration Sensor Calibration
(Complete)

Airbag sensor assembly (G sensor)

HINT:

Depending on the vehicle, the deceleration sensor may not be built into the airbag sensor assembly, but installed separately.

Stop&Start Operating Permission (After Running)

Item to Check or Action to be Taken

Conditions Required for Permission

Stop the vehicle after driving at a speed of 7 km/h (4 mph) or more.

Data List / Vehicle Speed

(Ignition switch ON with vehicle being driven at 7 km/h (4 mph) or more)

Check the vehicle speed signal.

Data List / IG-ON State Before Starting

(ON: Stop and start can operate based on the initial trip conditions)

Check the vehicle speed signal.

Stop&Start Operating Permission (Vehicle Speed)

Item to Check or Action to be Taken

Conditions Required for Permission

Check the vehicle speed as indicated by the engine stop and start ECU.

Data List / Vehicle Speed

(Standard: 0 km/h (0 mph) (Vehicle stopped after engine warmed up))

Wheel speed sensor

Skid control ECU (brake actuator assembly)

Stop&Start Operating Permission (Idling Stop Performance Waiting Time)

Item to Check or Action to be Taken

Conditions Required for Permission

Stop the vehicle after driving for 5 seconds (reference value) or more.

Data List / Stop&Start of Engine State

(5 seconds (reference value) or more have elapsed after changing to "Run" from a value other than "Run".)

HINT:

Run: Engine running

Stop&Start Operating Permission (Interval For Starter)

Item to Check or Action to be Taken

Conditions Required for Permission

Ignition switch is ON (maximum of 4 minutes).

A certain amount of time has elapsed since the starter motor became inoperative.

HINT:

The amount of time varies depending on the cranking time (maximum of 4 minutes).
The method of confirming if the starter motor is inoperative changes depending on the type.

When Data List "Starter Type" is "Tandem Starter":
- Data List / Starter Motor
  (OFF: Not cranking)
- Data List / Starter
  (OFF: Starter pinion not operating)
When Data List "Starter Type" is "Other than Tandem Starter":
- Data List / Starter
  (OFF: Starter not operating)

Stop&Start Operating Permission (Starter Check Complete)

Item to Check or Action to be Taken

Conditions Required for Permission

STA signal circuit

HINT:

Refer to STA Signal Circuit of Stop and Start System.

Data List / Vehicle Speed
(Drive the vehicle at a speed of 15 km/h (9 mph) or more and perform initial inspection at a speed of 15 km/h (9 mph) or less.)
Data List / Shift Position
(D)
The starter drive transistor is not malfunctioning.
There is no open in the wire harness between the engine stop and start ECU and ECM.

Stop&Start Operating Permission (Oil Pump with Motor Assembly)

Item to Check or Action to be Taken	Conditions Required for Permission
Perform diagnosis by forcibly operating the oil pump with motor assembly using the Active Test.	DTCs are not output. Data List / Vehicle Speed (Drive the vehicle at a speed of 15 km/h (9 mph) or more and perform initial inspection at a speed of 15 km/h (9 mph) or less.)
Oil pump with motor assembly	-

Stop&Start Operating Permission (Discharged Oil Pump Air)

Item to Check or Action to be Taken

Conditions Required for Permission

Confirm there is no air in the CVT oil pump.

HINT:

Refer to Registration of Stop and Start System.

Data List / Oil Pump Air Discharge status

(Complete)

HINT:

Depending on the vehicle specifications, OK may be displayed even when incomplete.

Stop&Start Operating Permission (Steering)

Item to Check or Action to be Taken

Conditions Required for Permission

Confirm the steering wheel is not operated when the vehicle is stopped.

Data List / Steering Angle Velocity

(Less than 45 deg/s)

Steering sensor
Steering system

Data List / Steering Angle Sensor Malfunction
(OFF: Normal)
Data List / Steering Angle Sensor Circuit Open (+B)
(OFF: Normal)
Data List / Steering Angle Sensor Abnormal Value
(OFF: Normal)
Data List / Steering Torque Sensor Malfunction
(OFF: Normal)

Stop&Start Operating Permission (Shift D Position)

Item to Check or Action to be Taken

Conditions Required for Permission

Confirm that the shift conditions required for the stop and start system to operate are met.
Stop the vehicle after driving at a speed of 7 km/h (4 mph) or more (ensure that the brake pedal remains depressed).

Vehicle being driven at 7 km/h (4 mph) or more.
Data List / Running History
(ON: History of driving vehicle at 2 km/h (1 mph) or more (without DTC output))
Data List / Shift Position
(D)
Data List / Stop Light SW (ECM)
(ON: Brake pedal depressed)
Data List / Stop Light SW (ABS/VSC)
(ON: Brake pedal depressed)
Data List / Master Cylinder Pressure*
(Standard: 1.1 MPa or higher (11.2 kg/cm², 276 psi) (changes according to gradient)

HINT:

*: w/ Vacuum Brake Booster
w/o Vacuum Brake Booster: Refer to the threshold of "Driver Operation Control Torque".

Stop&Start Operating Permission (No Shift Operation)

Item to Check or Action to be Taken	Conditions Required for Permission
Confirm that the shift conditions required for the stop and start system to operate are met. Shift lever assembly	The shift lever has not been operated for 1 second or more. Data List / Shift Position (Other than Unset)

Stop&Start Operating Permission (Idling)

Item to Check or Action to be Taken	Conditions Required for Permission
Check that the engine is idling. When the engine speed is high, wait until the engine starts idling. Accelerator pedal released Accelerator pedal sensor ECM (or transmission control ECU)	Data List / Vehicle Speed (0 km/h (0 mph) (After the engine warms up)) Data List / Idle (ON: Accelerator pedal fully released) Data List / Engine Speed (Less than 1250 rpm (Varies depending on the engine coolant temperature.))

Stop&Start Operating Permission (Key Operation)

Item to Check or Action to be Taken	Conditions Required for Permission
-	Starter not operating When Data List "Starter Type" is "Tandem Starter": Data List / Starter Motor (OFF: Not cranking) Data List / Starter (OFF: Starter pinion not operating) When Data List "Starter Type" is "Other than Tandem Starter": Data List / Starter (OFF: Starter not operating)

Stop&Start Operating Permission (Elapsed Time After IG-ON)

Item to Check or Action to be Taken

Conditions Required for Permission

Check that the ignition switch is ON using the Data List.

Data List / IG Switch

(5 seconds or more have passed with the ignition switch ON)

Stop&Start Operating Permission (DTC)

Item to Check or Action to be Taken	Conditions Required for Permission
Check for stop and start system DTCs. Backup boost converter circuit Engine stop and start ECU	No stop and start system DTCs are output. DTCs have been cleared. HINT: Even if no DTCs are stored, perform the Clear DTC procedure as there may be pending DTCs.

Stop&Start Precondition

Item to Check or Action to be Taken

Conditions Required for Permission

Confirm that the following items required for operation of the stop and start system are met:

Operating Permission (ECM1, Power Management, ABS/VSC, ABS/VSC 2, Elapsed Time After IG-ON, DTC, A/C, Idling Stop Performance Waiting Time, After Running, Engine Hood Closed, Driver Door Closed, Cancel Switch, Interval For Starter, AT/CVT, AT/CVT2, Key Operation, Driver Side Buckle SW, etc.)

HINT:

Depending on the vehicle, AT/CVT and AT/CVT2 may be part of Data List item "Stop&Start Precondition 2".

Stop&Start Precondition 2

Item to Check or Action to be Taken

Conditions Required for Permission

Confirm that the following items required for operation of the stop and start system are met:

Operating Permission (Idling, Road Surface Gradient, No Shift Operation, Brake Negative Pressure, Starter Check Complete, etc.)

GO TO STEP 19

16.	CHECK VEHICLE CONDITIONS (OTHER SYSTEMS)

(a) Based on the respective Data List item, ensure the operation permission conditions are met.

HINT:

Depending on the vehicle, some of the items are not displayed.

Stop&Start Operating Permission (4WD and Rear Differential Lock)

Item to Check or Action to be Taken

Conditions Required for Permission

Confirm that rear differential lock is off.
Confirm the drive mode is NORMAL, ECO or COMFORT.
Confirm that snow mode is off.

Data List / Rear Differential Lock Operation State

(OFF: Free)

Stop&Start Operating Permission (ACC)

Item to Check or Action to be Taken	Conditions Required for Permission
Confirm that dynamic radar cruise control system is off. Inspect the dynamic radar cruise control system.	When the dynamic radar cruise control system with full-speed range function is operating, the vehicle is stopped, and the brake hold function of the electric parking brake system has operated.

Stop&Start Operating Permission (IPA)

Item to Check or Action to be Taken	Conditions Required for Permission
Confirm that advanced park is off. Inspect the advanced park (AP). Engine stop and start ECU	Operation of the stop and start system is not prohibited due to the advanced park (AP).

Stop&Start Operating Permission (Welcab)

Item to Check or Action to be Taken	Conditions Required for Permission
Confirm that side lift up seat system is off. Inspect the side lift up seat system.	Operation of the stop and start system is not prohibited due to the side lift up seat system.

Stop&Start Operating Permission (Air Suspension)

Item to Check or Action to be Taken	Conditions Required for Permission
Confirm that air suspension system is off.	Operation of the stop and start system is not prohibited due to the air suspension system.

GO TO STEP 19

17.	CHECK VEHICLE CONDITIONS (BRAKE SYSTEM)

(a) Based on the respective Data List item, ensure the operation permission conditions are met.

HINT:

Depending on the vehicle, some of the items are not displayed.

Stop&Start Operating Permission (Brake Master Pressure 0 Point Correction)

Item to Check or Action to be Taken	Conditions Required for Permission
Check the brake master cylinder pressure when the brake pedal is released.	Data List / Stop Light SW (ABS/VSC) (OFF: Brake pedal fully released) Data List / Stop Light SW (ECM) (OFF: Brake pedal fully released) Data List / Master Cylinder Pressure* (0 MPa) HINT: *: w/ Vacuum Brake Booster w/o Vacuum Brake Booster: Refer to the threshold of "Driver Operation Control Torque".

Stop&Start Operating Permission (ABS/VSC)

Item to Check or Action to be Taken	Conditions Required for Permission
Check for vehicle stability control system DTCs. Skid control ECU (brake actuator assembly)	No vehicle stability control system DTCs are output. Vehicle speed is less than 3 km/h (2 mph). Communication between the skid control ECU (brake actuator assembly) and engine stop and start ECU is normal. Brake control (VSC, ABS, TR(A)C, automatic brake) is not operating. No stop and start system DTCs are output.

Stop&Start Operating Permission (ABS/VSC 2)

Item to Check or Action to be Taken	Conditions Required for Permission
After brake control (VSC, ABS, TR(A)C, automatic brake) stops operating, operation of the stop and start system becomes possible.	Brake control (VSC, ABS, TR(A)C, automatic brake) is not operating.

Wheel Speed Malfunction

Item to Check or Action to be Taken

Conditions Required for Permission

Perform a wheel speed sensor inspection.

Data List / Wheel Speed Malfunction

(OFF: Input value from speed sensor is normal)

GO TO STEP 19

18.	CHECK VEHICLE CONDITIONS (TRANSMISSION SWITCH)

(a) Based on the respective Data List item, ensure the operation permission conditions are met.

HINT:

Depending on the vehicle, some of the items are not displayed.

Stop&Start Operating Permission (Shift Position)

Item to Check or Action to be Taken

Conditions Required for Permission

Move the shift lever from N to other than N and then back to N.
Neutral position switch circuit
Engine stop and start ECU

HINT:

Before the vehicle is stopped after being driven, if there is shift lever history, operation of the stop and start system becomes possible.

Data List/ Stop&Start of Engine State
(Run: Engine running)
Data List / Neutral Switch
(ON: Shift lever in N or P → OFF: Shift lever in other than N or P)

Stop&Start Operating Permission (Clutch)

Item to Check or Action to be Taken

Conditions Required for Permission

Move the shift lever from N to other than N with the clutch pedal depressed.
Neutral position switch circuit
Clutch upper switch
Engine stop and start ECU

HINT:

Before the vehicle is stopped after being driven, if there is shift lever history, operation of the stop and start system becomes possible.

Data List / Stop&Start of Engine State
(Run: Engine running)
Data List / Neutral Switch
(ON: Shift lever in N or P → OFF: Shift lever in other than N or P)

Stop&Start Operating Permission (Neutral Switch)

Item to Check or Action to be Taken

Conditions Required for Permission

Neutral position switch circuit
Engine stop and start ECU

HINT:

Only applicable to manual transmission vehicles with stop and start system, and automatic transmission (transaxle) and CVT vehicles for which stop and start operates only when the shift state is P or N.

Data List / Vehicle Speed
(The vehicle is stopped after being driven at 7 km/h or more)
Data List / Running History
(ON: Running history exists)
Data List / Shift Position
(P or N)
Clutch pedal fully released

N/Clutch Lower Switch Malfunction

Item to Check or Action to be Taken	Conditions Required for Permission
Neutral position switch circuit Confirm that the value of the Data List item changes accordingly when the shift lever is moved from N to other than N. Confirm that the value of the Data List item changes accordingly when the clutch pedal is depressed and released. Clutch upper switch Engine stop and start ECU	When all of the following conditions are met, operation of the stop and start system is prohibited: Vehicle speed (ABS ECU) is 0 km/h (0 mph). Engine Speed (ECM) and Engine Speed (NE Signal) is 500 rpm or more. Neutral Switch is OFF (shift lever not in neutral) or Clutch Upper SW is ON (clutch pedal fully released).

N/Clutch Upper Switch Malfunction

Item to Check or Action to be Taken

Conditions Required for Permission

Confirm that the value of the Data List item changes accordingly when the shift lever is moved from N to other than N.
Confirm that the value of the Data List item changes accordingly when the clutch pedal is depressed and released.
Neutral position switch circuit
Clutch lower switch
Engine stop and start ECU

When all of the following conditions are met, operation of the stop and start system is prohibited:

Vehicle Speed (ABS ECU) is 0 km/h (0 mph) or more, Idle is ON (accelerator pedal fully released) and Accelerator Position is 0%.
Engine Speed (ECM) and Engine Spd (NE Signal) takes 2 seconds or more to drop from 4000 to 2000 rpm.
Neutral Switch is ON (shift lever in Neutral) or Clutch Lower SW is ON.

Stop&Start Operating Prohibition (Manual Start for the First Time)

Item to Check or Action to be Taken

Conditions Required for Permission

Turn the ignition switch off and wait for 30 seconds or more, and then turn the ignition switch to ON.
Check whether idling stops when the idling stop conditions are met. If the stop and start system does not operate, perform the following actions.
- Confirm that the value of the Data List item changes accordingly when the shift lever is moved from N to other than N.
- Confirm that the value of the Data List item changes accordingly when the clutch pedal is depressed and released.
Clutch lower switch
Neutral position switch circuit

When all of the following conditions are met, operation of the stop and start system is prohibited:

Data List / Stop&Start of Engine State
(The value changes from "IG" (engine stop) to "Run" (engine running))
Starter not operating
- When Data List "Starter Type" is "Tandem Starter":
  - Data List / Starter Motor
    (OFF: Not cranking)
  - Data List / Starter
    (OFF: Starter pinion not operating)
- When Data List "Starter Type" is "Other than Tandem Starter":
  - Data List / Starter
    (OFF: Starter not operating)
Clutch Lower SW is OFF or Vehicle Speed (ABS ECU) is 2 km/h (1 mph) or more.
Value of Data List item "Neutral Switch" is OFF (shift lever not in N)

Stop&Start Operating Permission (Manual Start)

Item to Check or Action to be Taken

Conditions Required for Permission

Turn the ignition switch off and wait for 30 seconds or more, and then turn the ignition switch to ON.
Check whether idling stops when the idling stop conditions are met. If the stop and start system does not operate, perform the following actions.
- Confirm that the value of the Data List item changes accordingly when the shift lever is moved from N to other than N.
- Confirm that the value of the Data List item changes accordingly when the clutch pedal is depressed and released.
Clutch upper switch
Neutral position switch circuit

When all of the following conditions are met (the vehicle is manually started when the engine is stopped by the stop and start system), operation of the stop and start system is prohibited:

Data List / Stop&Start of Engine State
(Stop: Engine stopped by stop and start control)
Starter not operating
- When Data List "Starter Type" is "Tandem Starter":
  - Data List / Starter Motor
    (OFF: Not cranking)
  - Data List / Starter
    (OFF: Starter pinion not operating)
- When Data List "Starter Type" is "Other than Tandem Starter":
  - Data List / Starter
    (OFF: Starter not operating)
Value of Data List item "Clutch Upper SW" is ON (clutch pedal fully released).
Vehicle Speed (ABS ECU) value exceeds the threshold.
Value of Data List item "Neutral Switch" is OFF (shift lever not in neutral)
Data list "Engine Spd (ECM)" and "Engine Spd (NE Signal)" value exceeds the threshold.

19.	STOP AND START SYSTEM OPERATION CHECK (PERMISSION STATUS AND NUMBER OF OPERATION PROHIBITIONS)

(a) Ensure there are no Data List items indicating a value that prohibits engine start and check if the stop and start system operates.

(b) Check if the stop and start system operates.

Click here

HINT:

If the stop and start system does not operate, proceed to the next suspected item.

OPERATES

END (Explain to the customer that the problem could not be reproduced)

DOES NOT OPERATE

CHECK NEXT PERMISSION STATUS AND NUMBER OF OPERATION PROHIBITIONS

(a) Proceed to the next suspected item.