NHTSA ID Number: 11005146
Manufacturer Communication Number: T-TT-0709-22 Rev2
TSB/Document Date: 2024-07-23
Summary
•Some customers may be concerned that EV (Electric Vehicle) Battery charging performance does not meet their expectation. •To extend the life of the EV Battery, some limitations may occur during EV battery charging •This communication is a reference to the factors that can lead to charging limitations, as explained in the Owner’s Manual (Electric Vehicle System - Section 2.2)
Tech Tip T-TT-0709-22
Subject
May 10, 2024
Market
USA
EV Battery Charging Performance
Service Category
Section
Hybrid
/Battery Control System
Applicability
bZ4X
APPLICABLE VEHICLES
2023-2024
bZ4X
CONDITION
Some customers may be concerned that EV (Electric Vehicle) Battery charging performance does
not meet their expectation.
To extend the life of the EV Battery, some limitations may occur during EV battery charging
This communication is a reference to the factors that can lead to charging limitations, as explained
in the Owner’s Manual (Electric Vehicle System - Section 2.2)
RECOMMENDATIONS
In the following situations, charging time may increase:
●In very hot or very cold temperatures.
●When the traction battery becomes hot, such as immediately after high-load driving.
●The vehicle is consuming a lot of electricity, for example, when the headlights are on, etc.
●When using “My Room Mode”
●There is a power outage during charging.
●There is an interruption in the electrical supply.
●There is a drop in the voltage of external power source.
●The charge in the 12-volt battery is low, for example due to the vehicle being left unused for a long period of
time.
●When the upper limit of charging current is changed in the charging current setting of the vehicle
●When the battery heater operates.
●When the plug generates heat due to a loose outlet connection, etc.
●When adjusting the power supply with the charger.
●When frequently and repeatedly using DC charging (within a 24 hour period).
●When selecting “DC charging power” setting other than “MAX”.
●When the temperature of charging-related parts is high.
During DC charging:
●As the battery approaches full charge, the charging speed will decrease and it will take longer to complete
charging, especially over 80% State of Charge (SOC).
●It is recommended to avoid frequent DC charging to prevent a decline in the traction battery capacity.
●The actual charging time may differ from that displayed on the DC charger during charging.
Expires on
Ver. 4.0 01/01/2022 T
05/10/2025
Rev2
© 2022, Toyota Motor Sales, USA
Page 1 of 2
Tech Tip T-TT-0709-22
May 10, 2024
Subject
Market
EV Battery Charging Performance
USA
Applicability
RECOMMENDATIONS
●The time to complete charging may change, or charging may stop before reaching the upper limit of the
charge capacity, due to the remaining charge of the traction battery, the outside temperature, the specifications
of the charger (stand), etc.
●There may be occasions the radio system cannot be heard due to noise occurrence during DC charging
LINK REFERENCES
1.
2.
Toyota 2023 bZ4X Owner's Manual (OM42C01U)
Toyota 2024 bZ4X Owner's Manual USA and Canada Only (OM42E95U)
Expires on
Ver. 4.0 01/01/2022 T
05/10/2025
Rev2
© 2022, Toyota Motor Sales, USA
Page 2 of 2
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TSB/Document ID: T-TT-0709-22 Rev2
Replacement Service Bulletin Number:
MFR Communication Date: 2024-05-10
MFR Internal Campaign ID/Software Version: T-TT-0709-22
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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