T-SB-0044-22

T-SB-0044-22
April 27, 2022
BEV Traction Battery Long-Term Maintenance
Guidelines
Service
Category
General
Section
Pre-Delivery Service
Market USA
Applicability
YEAR(S)
MODEL(S)
2023
bZ4X
ADDITIONAL INFORMATION
Introduction
Battery Electric Vehicles (BEVs) receive electricity via an external power source that is stored in
the BEV traction battery. When the electric vehicle will not be used for a period of 30 days or more,
the traction battery will self-discharge, reducing vehicle range. To prevent the battery from fully
discharging it is necessary to maintain the charge level of the traction battery.
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
N/A
Not Applicable to Warranty
–
–
–
–
© 2022 Toyota Motor Sales, USA
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T-SB-0044-22
April 27, 2022
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BEV Traction Battery Long-Term Maintenance Guidelines
Long-Term Storage Guidelines
Below are items that should be checked periodically and their frequency.
Table 1. Summary Chart for Long-Term Storage
ACTION
FREQUENCY
Charge the BEV Traction Battery (if Needed)
Upon Arrival at Dealer, Then Every 30 Days
It is important to recognize that BEV traction battery capacity is reduced with time and use in the
same way as other rechargeable batteries.
To mitigate the possibility of the BEV traction battery capacity being reduced, please follow
these recommendations:

Avoid parking the vehicle in high-temperature areas under direct sunlight when the BEV
traction battery is fully charged.

Avoid accelerating and decelerating frequently or suddenly when driving the BEV.

Avoid driving the BEV frequently at high speed.

Avoid frequent DC charging.
BEV Traction Battery Maintenance Procedure for Dealers
The BEV traction battery State-Of-Charge (SOC) MUST be checked upon vehicle arrival at the
dealer/retailer and once every 30 days thereafter.
1. Validate if the low traction battery warning light is displayed ON within the instrument cluster.
2. If the warning light is displayed ON, charge the traction battery via the AC charging method.
Table 2.
CONNECTED
POWER SOURCE
CHARGING VOLTAGE
CHARGING CURRENT
CHARGING TIME
CHARGER
DC CHARGING
Avoid Using
DC Charger
for Supplementary
Charging During
Long-Term Storage,
Prefer AC Charging
AC CHARGING CABLE
AC CHARGING
AC 220 – 230 V
32 A
16 A
8 – 10 A
Approximately
30 Minutes
Approximately
60 Minutes
Approximately
90 Minutes
3. After charging has been completed, verify the low traction battery warning is OFF before
storing the vehicle long-term. If the low traction battery warning is still ON after charging,
repeat the charging process.
NOTE
Model specific information for charging the BEV traction battery, charging equipment, and charging
method can be referenced from the vehicle’s owner’s manual. Avoid using the DC charger for
supplementary charging during long-term storage.
© 2022 Toyota Motor Sales, USA