CAMPAIGN

24-01-070G

AUGUST 2024

GV60 (JW1 EV)

BMS UPDATE FOR DTC P1AA900 – CELL VOLTAGE VARIANCE
(SERVICE CAMPAIGN T57G)
 IMPORTANT
Retailers must perform this service campaign on all affected vehicles prior to retail delivery to a
guest and whenever an affected vehicle is in the shop for any maintenance or repair.
Access the “Vehicle Information” screen via WebDCS to identify open campaigns.
Description: Certain GV60 (JW1 EV) vehicles may exhibit a condition where DTC P1AA900 becomes
active after charging. The Battery Management System (BMS) software logic could cause an HV battery
cell voltage to be misread under specific conditions resulting in a false-positive DTC P1AA900, MIL on,
and 80% maximum HV battery charge limit. There is no other effect on the vehicle and all systems
remain operational. Regardless of whether the vehicle has an active DTC P1AA900 or not, follow the
procedure in this TSB to update the software for the Battery Management System (BMS).

Applicable Vehicles:
• 2023-2024MY GV60 (JW1 EV) produced from 02/11/2022 – 02/13/2024

NOTICE
To avoid any potential damage to Genesis EVs, this service campaign can only be performed by
EV certified Genesis retailers.

GDS Information:
System Selection: BMS

BMS

1068

JW1 P1AA900 CELL VOLTAGE VARIANCE

(*or use a later available event as listed in the GDS BMS Update screen if one is available.)

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

Warranty Information:

GV60
40D118R0 BMS Software Update 0.3 M/H 375A0-CU060
I14
ZZ3
(JW1 EV)
NOTE 1: Submit claim on Claim Entry Screen as “Campaign” type.
NOTE 2: If a part is found in need of replacement while performing this campaign and the affected
part is still under warranty, submit a separate claim using the same repair order. If the affected part is
out of warranty, submit a Prior Approval request for goodwill consideration prior to performing the
work.
NOTE 3: Op times include VIN, Mileage, and photo capture of the “ECU update complete” screen as
outlined in the Digital Documentation Policy.
ROM ID Information: Event # 1068

GV60
(JW1 EV)

BMS

375A0-CU060

375A0CU060_5100

375A0CU060_5200

Service Procedure:

STUI
This TSB includes Repair validation photos. Refer to the latest Warranty Digital Documentation
Policy for requirements.

NOTICE
You must initially perform the GDS ECU update in Auto Mode.
• If the ECU update starts but then fails in Auto Mode, perform the update in Manual Mode
to recover.

NOTICE
GDS Vehicle Battery Low Voltage Warning:
If voltage is below 12 volts per the GDS warning, then select Back and attach a battery charger to
ensure an adequate battery charge for reliable update results. Turn ignition back ON, and then
retry the ECU update again.

TSB #: 24-01-070G

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SUBJECT:

1.

Perform the ECU update in Auto Mode.
Use the ID Check to verify the ROM ID before
updating the software.

i

Information

Refer to TSB # 24-GI-016G, “ECU Update
Procedure for Tablet-Based Genesis
Smart”, for additional information.

2.

Select the BMS system to scan the vehicle’s
current ROM ID.

NOTICE
Check the current ROM ID version and
compare it to the ROM ID Information
table before attempting to perform the
software update.

NOTICE
If the update fails, please remove the
power connector or the battery (–)
connector from the indoor fuse box for at
least 5 seconds and reassemble it to
retry the update.

TSB #: 24-01-070G

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3.

After the ECU update process shows 100%
complete, follow the prompts on the screen to
cycle the ignition OFF for at least 10 seconds
to reset the control unit (certain models may
take up to 30 seconds).

i

Information

Use the Refresh button to reset the timer.

4.

STUI
Take a screenshot of the ECU update
complete screen using your tablet and
upload to STUI.

5.

Perform an All Systems Fault Code search
and erase DTC history that had incidentally
occurred from the ECU update.

6.

Start the vehicle in Ready mode to confirm
proper operation.

TSB #: 24-01-070G

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NOTICE
If the ECU update fails in Auto Mode, perform the update in Manual Mode using the password(s)
below.
Manual Mode Password: Event # 1068
JW1 EV BMS 375A0-CU060

TSB #: 24-01-070G

9847

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SUBJECT: