NTB23-003

Classification:
Reference:
EL22-017
Date:
NTB23-003
January 5, 2023
12 VOLT BATTERY CHARGING LOGIC SERVICE INFORMATION
APPLIED VEHICLES:
2023 ARIYA (FE0)
SERVICE INFORMATION
12 volt Lead Acid Battery (12 volt LAB) charging logic and best practices to ensure
12 volt condition is maintained.
The ARIYA has many advanced electronic systems that are heavily dependent on the 12
volt LAB. Under certain conditions, the 12 volt LAB may or may not receive charging by the
High Voltage battery (HV battery), through the DC/DC converter. Not understanding these
conditions can lead to a discharged 12 volt LAB.
The ARIYA has several key functions to ensure that the 12 volt LAB is properly tended, and
kept at a high State of Charge (SOC). Table 1 on page 2 shows multiple scenarios where
the DC/DC converter is providing a charge. Some of these key functions must be
understood in order to ensure the vehicle is able to maintain the 12 volt LAB.
The Extra Feeding function is an event where the DC/DC converter charges the 12 volt
LAB for 10 minutes. This event occurs every 24 hours, regardless of the 12 volt LAB’s
SOC, from the last ignition cycle and is intended to maintain the vehicle 12 volt LAB during
storage.
The Rescue Charging function is an event where the DC/DC converter will output a current
load, continuously for 2 hours, in order to recover the 12 volt LAB. During vehicle sleep, the
IPDM will wake up every 4 hours to check the 12 volt LAB’s voltage, and then go back to
sleep. If during one of these technical wake ups, the IPDM detects that the 12 volt LAB has
fallen below 11.2 volts it will initiate “Rescue Charging”.
IMPORTANT:
During PDI: Ensure that the vehicle is in Ready Mode. Because of how the DC/DC
convertor operates, it is important to keep the vehicle in Ready Mode, so that while
completing the PDI the 12 volt LAB does not discharge and cause the vehicle to become
inoperable.
Vehicle Lot Storage: Ensure that when vehicles are being stored, the HV Battery
percentage is kept at a minimum of 30%. This ensures that the Extra Feeding function will
occur and retain positive 12 volt LAB’s SOC.
Showroom Storage: Ensure the hood is kept closed while the vehicle is being displayed
on the showroom floor. As noted in Table 1, when the hood switch is in the open position
the DC/DC converter will not charge the 12 volt LAB.
Bulletins are intended for use by qualified technicians, not 'do-it-yourselfers'. Qualified technicians are
properly trained individuals who have the equipment, tools, safety instruction, and know-how to do a job
properly and safely. NOTE: If you believe that a described condition may apply to a particular vehicle, DO
NOT assume that it does. See your Nissan dealer to determine if this applies to your vehicle.
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Table 1
Key
position
Vehicle
status
Ready
Ready
IGN ON
IGN ON
Vehicle condition
Under 15%
Hood close
Hood open
Back door close
Back door open
Hood close
Hood open
Back door close
Back door open
Not related
Hood close
Hood open
Back door close
Back door open
Hood close
Hood open
Back door close
Back door open
Hood close
Hood open
Back door close
Back door open
-
DC/DC
converter
LAB charge
ON
ON
ON
ON
ON
OFF
ON
ON
OFF
OFF
OFF
OFF
OFF
ON
OFF
ON
ON
OFF
ON
OFF
ON
ON
OFF
-
-
OFF
Under 12%
Hood close
Hood open
Back door close
Back door open
Hood close
Hood open
Back door close
Back door open
Hood close
Hood open
Back door close
Back door open
-
ON
OFF
ON
ON
ON
OFF
ON
ON
OFF
ON
OFF
ON
ON
OFF
-
-
OFF
HV battery
SOC
-
-
A/C ON
-
A/C OFF
-
Auto ACC
(before ready)
-
-
Auto ACC
(after ready)
-
Over 15%
Under 15%
During OTA
(except HV components)
During OTA
(HV components)
OFF
During HV battery
charging
Over 15%
-
OFF
During remote A/C
Over 15%
Under 15%
Extra Feeding
(LHD: 10min / 24h
RHD: 7 / 24h)
Technical wake up
(every 4h)
2/3
Over 12%
Hood/Back door
condition
NTB23-003
AMENDMENT HISTORY
PUBLISHED DATE REFERENCE
January 5, 2023
NTB23-003
DESCRIPTION
Original bulletin published
3/3
NTB23-003