Toyota Yaris: Stop And Start System / Stop and Start System does not Operate

Toyota Yaris XP210 (2020-2024) Reapir and Service Manual / Engine & Hybrid System / Stop And Start / Stop And Start System / 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 (eco run cancel switch assembly) has not been pressed. (Stop and start cancel indicator light is not illuminated)

(3) The driver door is closed.

NG

GO TO STEP 5

OK

3.

CHECK VEHICLE CONDITIONS (ENGINE HOOD AND BACK DOOR STATE)

(a) Check the engine hood and back door.

(1) The engine hood and back door is not open.

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

OK

GO TO STEP 6

NG

4.

STOP AND START SYSTEM OPERATION CHECK (ENGINE HOOD AND BACK DOOR STATE)

(a) Close the engine hood and back door, 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

GO TO STEP 6

5.

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 (eco run cancel 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

Result

Proceed to

DOES NOT OPERATE

A

OPERATES

B
A

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

6.

CHECK FOR DTC

(a) Read the DTCs.

Powertrain > Stop and Start > Trouble Codes Powertrain > Engine and Transmission > Trouble Codes Chassis > Brake > Trouble Codes

Result

Proceed to

Stop and start system DTCs are output

A

SFI system DTCs are output

B

Electronically controlled brake system DTCs are output

C

DTCs are not output

D

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.

A

GO TO DTC CHART
B

GO TO SFI SYSTEM

C

GO TO ELECTRONICALLY CONTROLLED BRAKE SYSTEM

D

7.

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 9

DISPLAYED

8.

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.

Multi-information Display Message

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 or back door opened.

    (With the engine hood or back door closed, wait for 30 seconds after turning the ignition switch off, and then start the engine.)
  • Stop&Start Operating Permission (ECM 1)
  • Stop&Start Operating Permission (ABS/VSC)
  • Stop&Start Operating Permission (ABS/VSC 2)
  • 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.

(Sufficiiently 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 (Master Cylinder 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 9

9.

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

Measurement Item

Stop&Start Operating Permission (AT/CVT)

Permission of stop and start automatic transmission system

A

Number of Stop&Start Operating Prohibition (AT/CVT 2)

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)

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 (eco run cancel 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 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 (ECM 1, ECM 2, Battery, ABS/VSC, ABS/VSC 2, IG SW, DTC, A/C, Interval, After Running, Engine Hood Closed, D Door Closed, Cancel Switch, Interval For Starter, AT/CVT, AT/CVT 2, Key Operation, Driver Side Buckle SW, Ambient Temperature)

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, O/P Check, Starter Check Complete)

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

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 intelligent parking assist system

Number of Stop&Start Operating Prohibition (IPA)

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)

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.
B

GO TO STEP 11

C

GO TO STEP 12

D

GO TO STEP 13

E

GO TO STEP 14

F

GO TO STEP 15

A

10.

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: 20°C (68°F) or higher and less than 112°C (233.6°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: 15°C (59°F) or higher and less than 105°C (221°F))

Confirm that engine learning is complete (A/F, ISC).

HINT:

Refer to Initialization for how to perform engine learning.

Powertrain / Engine and ECT / Data List / Engine speed

(Standard: Refer to Initialization.)

Check for ECD system DTCs.

DTCs are not output.

ECM (or transmission control ECU)

-
NEXT

GO TO STEP 16

11.

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

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

Click here

NEXT

GO TO STEP 16

12.

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:

Any 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 more 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)

Cooler:

Any 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)
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: 1.9 MPa or higher (19.4 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 (0.4 kg/cm2, 6 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 and back door 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 and back door, 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 and back door 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 U014087 (Lost Communication with main body ECU (Multiplex network body ECU) 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 (eco run cancel 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 (eco run cancel switch assembly) not pressed)

HINT:

If the value of the Data List item does not change when the stop and start system cancel switch (eco run cancel 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 (-1.36 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)

  • Data List / Deceleration Sensor Output Stuck

    (Normal: Deceleration sensor output normal)

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 (Inspected Oil Pump)

Item to Check or Action to be Taken

Conditions Required for Permission

Perform diagnosis by forcibly operating the oil pump assembly with motor 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.)

  • Data List / Battery Voltage

    (11.3 V or more)

  • Data List / Ambient Temperature

    (Higher than -5°C (23°F))

Oil pump assembly with motor

-
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 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: 1.9 MPa or higher (19.4 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.

  • Data List / Stop&Start Operating Permission (Brake Master Pressure 0 Point Correction)

    (OK)

  • Data List / Deceleration Sensor Output Stuck

    (Normal: Deceleration sensor output normal)

  • Data List / Stop&Start Operating Permission (Vehicle Speed)

    (OK)

  • Data List / Stop&Start Operating Permission (ECM 2)

    (OK)

  • Data List / Manual Start History during Stop&Start

    (OFF)
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 (ECM 1, ECM 2, Battery, ABS/VSC, ABS/VSC 2, IG SW, DTC, A/C, Interval, After Running, Engine Hood and Back Door Closed, D Door Closed, Cancel Switch, Interval For Starter, AT/CVT, AT/CVT 2, Key Operation, Driver Side Buckle SW, Ambient Temperature)

Operating Permission (ECM 1, ECM 2, Battery, ABS/VSC, ABS/VSC 2, IG SW, DTC, A/C, Interval, After Running, Engine Hood and Back Door Closed, D Door Closed, Cancel Switch, Interval For Starter, AT/CVT, AT/CVT 2, Key Operation, Driver Side Buckle SW, Ambient Temperature)

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, Steering, O/P Check, Starter Check Complete)

Operating Permission (Idling, Road Surface Gradient, No Shift Operation, Brake Negative Pressure, Steering, O/P Check, Starter Check Complete)
NEXT

GO TO STEP 16

13.

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.
  • Operation of the stop and start system is not prohibited due to the dynamic radar cruise control system.
Stop&Start Operating Permission (IPA)

Item to Check or Action to be Taken

Conditions Required for Permission
  • Confirm that intelligent parking assist system is off.
  • Inspect the intelligent parking assist system.
  • Engine stop and start ECU

Operation of the stop and start system is not prohibited due to the intelligent parking assist system.
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.
NEXT

GO TO STEP 16

14.

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)
NEXT

GO TO STEP 16

15.

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.
NEXT

16.

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

    Stop and Start Cancel Switch Circuit

    DESCRIPTION Stop and start control can be disabled by pressing the stop and start system cancel switch (combination switch assembly). The stop and start system cancel switch (combination switch assembly) is a momentary-type switch that switches between on and off when the switch is pressed...

    Stop and Start System does not Operate (Battery Condition)

    DESCRIPTION When the stop and start system does not operate, check whether the operation is prohibited because the auxiliary battery conditions are not met...

    Other information:

    Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Replacement


    REPLACEMENT CAUTION / NOTICE / HINT The necessary procedures (adjustment, calibration, initialization, or registration) that must be performed after parts are removed and installed, or replaced during the transfer case front oil seal removal/installation are shown below...

    Toyota Yaris XP210 (2020-2024) Reapir and Service Manual: Problem Symptoms Table


    PROBLEM SYMPTOMS TABLE NOTICE: Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Registration. Click here HINT: Use the table below to help determine the cause of problem symptoms...

    Categories

    Liftgate/Trunk Lid

    WARNING

    Never allow a person to ride in the luggage compartment/trunk

    Allowing a person to ride in the luggage compartment/trunk is dangerous. The person in the luggage compartment/trunk could be seriously injured or killed during sudden braking or a collision.

    Do not drive with the liftgate/trunk lid open

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