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Ecu/TCU Software Update For ISG Logic Improvement (24-FL-002H)

Publication date: 2024-02-28
Reference number: 24-FL-002H

ECU/TCU SOFTWARE UPDATE FOR ISG LOGIC IMPROVEMENT

ECU/TCU SOFTWARE UPDATE FOR ISG LOGIC IMPROVEMENT

TECHNICAL SERVICE BULLETIN

Reference Number(s): 24-FL-002H, Date of Issue:  February 28, 2024
HYUNDAI: 2022-2023MY Sonata (DN8), 2020-2022MY Sonata (DN8a)
GROUP: FUEL SYSTEM

DESCRIPTION

This bulletin provides the procedure to update the Engine Control Module (ECM) and/or the Transmission Control Module (TCM) for 2020-2023MY Sonata (DN8/DN8a) vehicles to improve operation of the Idle Stop and Go (ISG) system. Under certain circumstances the vehicle may not restart after the ISG system has engaged and requires a manual restart due to the lack of intake manifold pressure recovery.

Applicable Vehicles: 

GDS INFORMATION

GDS INFORMATION

System Event # Description
Engine 1074 DN8 THETA3 2.5GDI ECU S/W Improvement for ISG Logic Improvement
A/T 1075 DN8 THETA3 2.5GDI TCU S/W Improvement for ISG Logic Improvement
Engine 1076 DN8a THETA3 2.5GDI ECU S/W Improvement for ISG Logic Improvement
A/T 1077 DN8a THETA3 2.5GDI TCU S/W Improvement for ISG Logic Improvement

(*or use a later available event as listed in the GDS Engine or A/T System Update screen if one is available.)

WARRANTY INFORMATION

WARRANTY INFORMATION

Model Op. Code Operation Op. Time Casual Part Nature Code Cause Code
20-22MY Sonata (DN8/DN8a) 39110FH4 ECU + TCU Software Update 0.6 M/H Refer to WebLTS for applicable part to labor op combination W17 ZZ3
23MY Sonata (DN8) 39110FH5 ECU Software Update 0.4 M/H
NOTE:
  1. Normal warranty applies.
  2. Submit claim on Claim Entry Screen as "Warranty" type.
  3. This TSB includes Repair validation photos. Op times include VIN, Mileage, and photo capture of the "ECU update complete" screen as outlined in the Digital Documentation Policy.
  4. If a part is found in need of replacement while performing this TSB 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.

SERVICE PROCEDURE

STUI 

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

NOTE: 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.
NOTE: GDS Vehicle Battery Low Voltage Warning: 
If voltage is below 12 volts per the GDS warning, then select Back  and attach a battery maintainer/charger or run the vehicle for at least 20 minutes to ensure an adequate battery charge for reliable update results. Turn ignition back ON  , and then retry the ECU update again.
G16326397
  1. Perform the ECU and TCU updates in Auto Mode.

    Use the ID Check  to verify the ROM ID before updating the software.

    Information 

    Refer to TSB 15-GI-001 for additional information for the ECU update Procedure For Tablet-Based GDS Mobile.

    G16326398

    Information 

    2023MY Sonata (DN8) vehicles will only require ECU update 1074.

    G16326399

    STUI 

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

    G16326400
  2. After the ECU update process shows 100% complete, cycle the ignition key to OFF  for at least 10 seconds to reset the control unit.
  3. Perform an All Systems Fault Code  search and erase DTC history that had incidentally occurred from the ECU update.
  4. Start the vehicle in Ready  mode to confirm proper operation of the vehicle.

ROM ID INFORMATION TABLE: EVENT # 1074

ROM ID INFORMATION

Model MY System ECU Part Number ROM ID
Old New
DN8 2022 ECU 39110-2S040 DNDVD5GMC3XXXJ1A
DNDVD5GMC3XXXJ1B		 DNDVD5GMC3XXXJ1C
39110-2S279 DNDVD5GMC3XXXL5A
DNDVD5GMC3XXXL5B
DNDVD5GMC3XXXL8A		 DNDVD5GMC3XXXL8B
2023 39110-2S042 DNEVD5GMC3XXXM1A DNEVD5GMC3XXXM1B

ROM ID INFORMATION TABLE: EVENT # 1075

ROM ID INFORMATION

Model MY System TCU Part Number ROM ID
Old New
DN8 2022 TCU 39110-2S040 SDN8G25NB2 SDN8G25NB5
39110-2S279 SDN8G25NB3
SDN8G25NB4

ROM ID INFORMATION TABLE: EVENT # 1076

ROM ID INFORMATION

Model MY System ECU Part Number ROM ID
Old New
DN8a 2020 ECU 39102-2SDB0 DNBVN5GMC3XXXDBB
DNBVN5GMC3XXXDCA
DNBVN5GMC3XXXG2F
DNBVN5GMC3XXXG2G		 DNBVN5GMC3XXXG2H
2021 39104-2SDF0 DNCVN5GMC3XXXF0A
DNCVN5GMC3XXXG2F
DNCVN5GMC3XXXG2G		 DNCVN5GMC3XXXG2H
39100-2SDH0 DNCVN5GMC3XXXG2A
DNCVN5GMC3XXXG2B
DNCVN5GMC3XXXG2C		 DNCVN5GMC3XXXG2D
2022 39100-2SDK0 DNDVN5GMC3XXXJ1A
DNDVN5GMC3XXXJ1B		 DNDVN5GMC3XXXJ1C

ROM ID INFORMATION TABLE: EVENT # 1077

ROM ID INFORMATION

Model MY System TCU Part Number ROM ID
Old New
DN8a 2020   39102-2SDB0 SDN8G25NB0
SDN8G25NB1		 SDN8G25NB5
2021 TCU 39104-2SDF0 SDN8G25NB0
SDN8G25NB1
39100-2SDH0 SDN8G25NB2
2022   39100-2SDK0 SDN8G25NB2

MANUAL MODE PASSWORD: EVENT # 1074

MANUAL MODE PASSWORD INFORMATION

ECM Menu Password
DN8 2.5 GDI 8AT 22MY ISG 39110-2S040 5232
DN8 2.5 GDI 8AT 22MY ISG 39110-2S279 5233
DN8 2.5 GDI 8AT 23MY ISG 39110-2S042 5234

MANUAL MODE PASSWORD: EVENT # 1075

MANUAL MODE PASSWORD INFORMATION

TCU Menu Password
DN8 2.5 GDI 8AT ISG 39110-2S038/040/279/042 5241

MANUAL MODE PASSWORD: EVENT # 1076

MANUAL MODE PASSWORD INFORMATION

ECM Menu Password
DN8A 2.5 GDI 8AT 20MY ISG 39102-2SDB0 5251
DN8A 2.5 GDI 8AT 21MY ISG 39104-2SDF0 5252
DN8A 2.5 GDI 8AT 21MY ISG 39100-2SDH0 5253
DN8A 2.5 GDI 8AT 22MY ISG 39100-2SDK0 5254
DN8A 2.5 GDI 8AT 22MY ISG 39100-2SDM0 5255

MANUAL MODE PASSWORD: EVENT # 1077

MANUAL MODE PASSWORD INFORMATION

TCU Menu Password
DN8A 2.5 GDI 8AT ISG 39102-2SDB0/F0/H0/K0/M0 5241
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