GROUP
CAMPAIGN
DATE

Technical Service Bulletin
SUBJECT:

MARCH 2023

NUMBER
23-01-023H
MODEL(S)
SONATA HYBRID
(DN8 HEV)

ECU UPDATE – ITM (INTEGRATED THERMAL MANAGEMENT)
(P00B7) (SERVICE CAMPAIGN T9T)

Description: This bulletin provides information related to the ECU software update for Sonata Hybrid
(DN8 HEV) vehicles to revise the logic for the following DTC :
•

DTC P00B7 – Engine Coolant Flow Low/Performance

Applicable Vehicles:
■ Certain 23MY Sonata Hybrid (DN8 HEV) manufactured from July 05, 2022 to January 16, 2023
GDS Information:
Event #
Description
DN8
HEV
NU
GDI
ITM
LOGIC
IMPROVEMENT
(P00B7)
923
NOTES:
• Refer to TSB 15-GI-001 for additional tablet-based Mobile GDS ECU update information.
• After the ECU Upgrade process shows 100% complete, cycle the ignition key to OFF for at
least 30 seconds to reset the control unit. This step is important for establishing normal
powertrain communication and to prevent system errors.
• Clear DTC(s) present after the ECU update.
• Start engine to confirm proper operation of the vehicle.
!

WARNING
GDS Vehicle Battery Voltage Warning:
If voltage is below 12 volts as per the GDS warning, then
select Back and run the engine at least 15 minutes to
reach an adequate battery state of charge to prevent ECU
Update failure. Cycle the ignition OFF/ON before retrying
ECU update again.

Circulate To: Service Manager, Warranty Manager, Service Advisors, Technicians, Fleet Repair

ECU UPGRADE – ITM (INTEGRATED THERMAL MANAGEMENT)
(P00B7) (SERVICE CAMPAIGN T9T)

SUBJECT:

Warranty Information:
MODEL
OP CODE
OP NAME
OP TIME CAUSAL PART NATURE CAUSE
SONATA
HYBRID
20D175R0 ECU UPGRADE 0.3 M/H
39116-2J014
I11
ZZ3
(DN8 HEV)
NOTE 1: Submit claim on Campaign Claim Entry Screen.
NOTE 2: If a part that is not covered by this campaign is found in need of replacement while
performing this service 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.

NOTICE
You must initially perform all GDS ECU Updates in Auto Mode.
If the ECU Update starts but then fails in Auto Mode, perform the update in Manual Mode to recover.
ROM ID Information Table:
• Verify the ECM ROM ID before updating the software. Refer to the table below.
• IMMO (O) = Start Stop Button
• NON IMMO (X) = Key Start
#923
VEH

TM

IMMO

MY

ECU P/N

SONATA
HYBRID
(DN8
HEV)

6AT

+IMMO

23MY

39116-2J014

ROM ID
OLD

NEW

HDN82NS0AQ183C00

HDN82NS0AQ283C00

If the Automatic ECU Upgrade process fails, cycle the ignition key to OFF for at least 30 seconds
to reset the control unit. Then resume programming using the Manual ECU Upgrade processes.
After the ECU Upgrade process shows 100% complete, cycle the ignition key again to OFF for at
least 30 seconds to reset the control unit. This step is important for establishing normal
powertrain communication and to prevent system errors.

ANUALMANUAL MODE PASSWORD INFORMATION TABLE:
ECM MENU (#923)
DN8 HEV NU 6AT 39116-2J014

PASSWORD
2014

NOTE: After the ECU update has been completed:
• Clear any ECM DTC(s) after the ECU update.
Start the engine to confirm proper operation of the vehicle.

TSB #: 23-01-023H

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