Toyota Yaris: Stop And Start System / Precaution

NOTICE:

• When the engine stop and start ECU is replaced, it is necessary to read the number of starter operations before replacement, and to store this number in the new engine stop and start ECU, and perform external backup boost converter (eco run vehicle converter assembly) existence learning. Moreover, initialization/learning of the air conditioning information and initialization/learning of the deceleration sensor 0 point are also required.

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• When the starter assembly is replaced, the number of starter operations stored in the engine stop and start ECU must be reset.

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• When the starter assembly is replaced, "ST NO. 1 relay" must be also replaced.
• When the engine stop and start ECU has been replaced, perform ECU security key registration.

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HINT:

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

  In this case, let the vehicle idle to complete the refresh charge. The refresh charge is complete when the Data List item Status of Auxiliary battery Charge Control changes from "Refresh Charge Mode". (Usually, idling the engine for 5 to 60 minutes with the auxiliary battery fluid temperature at 11°C (52°F) or higher, the refresh charge will be completed.)

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

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

• After the refresh charge completes, turn the ignition switch off, wait for at least 30 seconds, and then start the engine again. If the vehicle enters refresh charge mode again while the engine is idling, the initial refresh charge did not properly complete, so wait for the refresh charge to complete.

• When the engine fails to restart when stopped by stop and start control.
• When the brake booster vacuum is insufficient.
• When the vehicle speed is 3 km/h (2 mph) or more and the brake pedal is depressed*.

  *: When the engine is not running.

HINT:

• When the engine fails to restart when stopped by stop and start control and the brake booster vacuum is insufficient, the brake actuator is activated to ensure the braking force.
• When the brake actuator is activated, sound and vibration may be generated. This is not due to malfunction of the stop and start system or the vehicle.

NOTICE:

• When towing the vehicle, its four wheels must be lifted.

  If the vehicle is to be towed with all four wheels on the ground, turn the ignition switch off and then ON without starting the engine. Only tow the vehicle at speeds below 30 km/h (19 mph) for distances of less than 80 km in a forward direction.

• If the towing speed or distance exceeds the above limits, or the vehicle is towed backward, the transaxle and stop and start system components may be damaged.

NOTICE:

• When the ECM is replaced on a vehicle with a non-specified auxiliary battery, it is necessary to perform auxiliary battery type switching.

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• Perform Registration (VIN registration or frame number registration) after replacing the ECM.

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Stop And Start System

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Parts Location

PARTS LOCATION ILLUSTRATION *A w/ Toyota Safety Sense *B w/ Active Noise Control System *1 ENGINE HOOD COURTESY SWITCH (HOOD LOCK ASSEMBLY) *2 VACUUM SENSOR ASSEMBLY *3 INNER REAR VIEW MIRROR ASSEMBLY *4 ECM *5 SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) *6 EXTERNAL BACKUP BOOST CONVERTER (ECO RUN VEHICLE CONVERTER ASSEMBLY) *7 MILLIMETER WAVE RADAR SENSOR ASSEMBLY *8 FORWARD RECOGNITION CAMERA *9 ENGINE ROOM RELAY BLOCK - EFI-MAIN NO...

Other information:

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

REMOVAL 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 rear drive shaft assembly removal/installation are shown below...

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

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