NHTSA ID Number: 10233539
Manufacturer Communication Number: 23-EE-002H
TSB/Document Date: 2023-04-04
Summary
This bulletin provides information related to the Engine Control Module (ECM) / Hybrid
Control Unit (HCU) software update for Tucson Hybrid (NX4 HEV) / Plug-in Hybrid (NX4 PHEV) vehicles to improve the following DTC and symptoms:
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TSB/Document ID: 23-EE-002H
Replacement Service Bulletin Number:
MFR Communication Date: 2023-03-13
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE AND ENGINE COOLING
MFR Component System:
MFR Component Subsystem:
Previous TSB | Next TSB |
GROUP
ENGINE
ELECTRICAL
SYSTEMS
DATE
Technical Service Bulletin
SUBJECT:
MARCH, 2023
NUMBER
23-EE-002H
MODEL(S)
TUCSON HYBRID
(NX4 HEV) &
TUCSON PLUG-IN
(NX4 PHEV)
ECU/HCU UPGRADE – G2T-GDI DTC MISDIAGNOSIS & OIL DILUTION
IMPROVEMENT
TSB 23-EE-002H supersedes 22-FL-003H to add the 2023 model year for the Tucson
Hybrid/Plug-in vehicles, revise the service procedure with the latest GDS events, and revise
the warranty information & op time information.
DESCRIPTION: This bulletin provides information related to the Engine Control Module (ECM) /
Hybrid Control Unit (HCU) software update for Tucson Hybrid (NX4 HEV) / Plug-in Hybrid (NX4
PHEV) vehicles to improve the following DTC and symptoms:
1. P1441 (EVAP System Flow During Non-Purge Condition)
a. Misdiagnosis due to insufficient margin of pressure deviation when driving at constant
speed with low engine load
i.
Logic improvement to eliminate misdiagnosis
2. P1A77 (Check Generator Belt)
a. Misdiagnosis due to poor synchronization release when the engine is stopped
i.
Logic improvement to release synchronization even if CAM signal is active
when engine is stopped
3. P00B7 (Engine Coolant Flow Low/Performance)
a. ITM control error due to temporary ball valve stuck
i.
Improvement to ITM cleaning logic (1 time -> 5 times)
4. P2118 (Throttle Actuator Control Motor Current Range/Performance) / P0401 (EGR Flow
Insufficient Detected)
5. P0236 (Turbocharger System Boost Sensor A Circuit Range/Performance) / P0299
(Turbocharger underboost)
a. Failure due to EGR condensate freezing
i.
Change the EGR Flow diagnosis condition (-40℃ → -7℃)
6. P2B60 (Engine Coolant Flow Control Valve Position Sensor Circuit Range/Performance)
a. Insufficient control at the end point when ITM cleaning logic completes operation
i.
Improve the ITM cleaning logic for better control
7. Oil Dilution: Some vehicles may experience increased oil consumption and white smoke due to
the diluting of engine oil with fuel because of the frequent transition between EV ↔ Engine
mode during the winter season
a. Modify fuel injection strategy below 10℃ and add oil heating function based on the
driving pattern.
Circulate To: Service Manager, Warranty Manager, Service Advisors, Technicians, Fleet Repair
SUBJECT:
ECU/HCU UPGRADE – G2T-GDI DTC MISDIAGNOSIS & OIL DILUTION IMPROVEMENT
APPLICABLE VEHICLES: All MY22-23 Tucson Hybrid (NX4 HEV) and Tucson Plug-in (NX4 PHEV)
equipped with 1.6L Gamma II turbocharged engines
GDS INFORMATION: System Selection: Engine:
Event #
Description
#911
ECU UPGRADE – NX4 (P)HEV G2T-GDI DTC MISDIAGNOSIS & OIL DILUTION
IMPROVEMENT
GDS INFORMATION: System Selection: HCU/LDC:
Event #
Description
#939
HCU UPGRADE – NX4 HEV G2T-GDI DTC MISDIAGNOSIS & OIL DILUTION
IMPROVEMENT
#940
HCU UPGRADE – NX4 PHEV G2T-GDI DTC MISDIAGNOSIS & OIL DILUTION
IMPROVEMENT
WARRANTY INFORMATION:
Model
Op Code
TUCSON HYBRID
(NX4 HEV) &
39131F17
TUCSON PLUG-IN
(NX4 PHEV)
Operation
Op Time
Causal Part
Nature
Code
Cause
Code
ECU + HCU
UPGRADE
0.8 M/H
39131-2MNC0 (NX4 HEV)
39131-2MND0 (NX4 PHEV)
I3T
ZZ3
NOTE 1: Normal Warranty Applies
SERVICE PROCEDURE:
NOTICE
To verify the vehicle is affected, be sure to check the version of the vehicle’s
ECU/HCU ROM ID with reference to the ECU/HCU ROM ID TABLE below before
attempting to upgrade the control unit software.
You must attach a 12V battery charger to the vehicle before performing GDS ECU/HCU
Update. This is to prevent a battery saver condition from occurring since Tucson
Plug-in/Tucson Hybrid uses a smaller battery.
You must initially perform GDS ECU/HCU Update in Auto Mode.
• If the ECU Update starts but then fails in Auto Mode, disconnect the battery cables and
touch the cables together for one minute. Reconnect the battery cables, attach the battery
charger and perform the update in Manual Mode to recover.
• Refer to the General Instructions found in TSB 15-GI-001 (GDS Mobile).
1. After the ECU Update is completed, check for Diagnostic Trouble Codes and erase
any DTC.
TSB #: 23-EE-002H
Page 2 of 5
SUBJECT:
SUBJECT:
ECU/HCU UPGRADE – G2T-GDI DTC MISDIAGNOSIS & OIL DILUTION IMPROVEMENT
ECU ROM ID TABLE:
Event
Model
Part Number
391312MNC0
391312MND0
391332MNC0
TUCSON
HYBRID
(NX4 HEV)
&
#911 (ECU)
TUCSON
PLUG-IN
(NX4 PHEV)
391332MND0
391312MNC1
391332MNC1
391312MNH0
391332MNH0
391312MNH1
391332MNH1
ROM ID
Old
JNX41NS06F00LC50
JNX41NS06F196C00
JNX41NS06F29BC00
JNX41NS06F00LF50
JNX41NS06F196F00
JNX41NS06F29BF00
JNX41NS06E00LC50
JNX41NS06E196C00
JNX41NS06E29BC00
JNX41NS06E00LF50
JNX41NS06E196F00
JNX41NS06E29BF00
JNX43NS06F09BC00
JNX43NS06E09BC00
QNX41NS06F091F00
QNX41NS06F193F00
QNX41NS06F296F00
QNX41NS06F396F00
QNX41NS06F49BF00
QNX41NS06E091F00
QNX41NS06E193F00
QNX41NS06E296F00
QNX41NS06E396F00
QNX41NS06E49BF00
QNX43NS06F09BF00
QNX43NS06E09BF00
TSB #: 23-EE-002H
New
JNX41NS06F39BC00
JNX41NS06F39BF00
JNX41NS06E39BC00
JNX41NS06E39BF00
JNX43NS06F19BC00
JNX43NS06E19BC00
QNX41NS06F59BF00
QNX41NS06E59BF00
QNX43NS06F19BF00
QNX43NS06E19BF00
Page 3 of 5
SUBJECT:
SUBJECT:
ECU/HCU UPGRADE – G2T-GDI DTC MISDIAGNOSIS & OIL DILUTION IMPROVEMENT
HCU ROM ID TABLE:
Event
Model
ROM ID
Part Number
Old
GNXC1N6HNS1LC740
_NXH1107A
36600-3DBJ0
GNXC1N6HNS2LC740
_NXH1C17B
TUCSON
HYBRID #939 (HCU)
(NX4 HEV)
36600-3DBJ1
GNXC1N6HNS1LC940
_NXH1107B
GNXC1N6HNS2LC940
_NXH1C17C
GNXC3N6HNS2LC740
New
GNXC1N6HNS2LC740
_NXH2930A
GNXC1N6HNSALC740
_NXH3126A
GNXC1N6HNS2LC940
_NXH2930A
GNXC1N6HNSALC940
_NXH3117A
GNXC3N6HNS3LC740
36600-3DDJ0
36600-3DDJ1
TUCSON
PLUG-IN #940 (HCU)
(NX4 PHEV)
36600-3DAJ5
36600-3DDJ5
_NXH2524A
GNXC3N6HNS2LC940
_NXH2524A
GNXC2N6PNS1-C940
_NXP1507A
GNXC2N6PNS1-C940
_NXP1518A
GNXC2N6PNS2-C940
_NXP2930A
GNXC1N6PNS2-C940
_NXP1C17D
GNXC3N6PNS2-C940
_NXP2524A
TSB #: 23-EE-002H
_NXH2A19A
GNXC3N6HNS3LC940
_NXH2A19A
GNXC2N6PNS3C940_NXP3221A
GNXC1N6PNSA-C940
_NXP3127A
GNXC3N6PNS3-C940
_NXP2A19B
Page 4 of 5
SUBJECT:
SUBJECT:
ECU/HCU UPGRADE – G2T-GDI DTC MISDIAGNOSIS & OIL DILUTION IMPROVEMENT
MANUAL UPDATE: If the ECU/HCU Update starts but then fails in Auto Mode,
perform the update in Manual Mode to recover.
Model
Event
Menu
HEV 6AT 2WD 22MY 391312MNC0
HEV 6AT 4WD 22MY 391312MND0
TUCSON
HEV 6AT 2WD 22MY 391332MNC0
HYBRID
HEV 6AT 4WD 22MY 391332MND0
(NX4 HEV)
HEV 6AT 2WD/4WD 23MY 391312MNC1
&
#911 (ECU)
HEV 6AT 2WD/4WD 23MY 391332MNC1
TUCSON
PHEV 6AT 4WD 22MY 391312MNH0
PLUG-IN
PHEV 6AT 4WD 22MY 391332MNH0
(NX4 PHEV)
PHEV 6AT 4WD 23MY 391312MNH1
PHEV 6AT 4WD 23MY 391332MNH1
HEV 1.6T-GDI 6AT 4WD 17inch 36600-3DBJ0
NXH1107A -> NXH2930A
HEV 1.6T-GDI 6AT 4WD 17inch 36600-3DBJ0
NXH1C17B -> NXH3126A
HEV 1.6T-GDI 6AT 4WD 19inch 36600-3DBJ1
TUCSON
NXH1107B -> NXH2930A
HYBRID
#939 (HCU)
HEV 1.6T-GDI 6AT 4WD 19inch 36600-3DBJ1
(NX4 HEV)
NXH1C17C -> NXH3117A
HEV 1.6T-GDI 6AT 4WD 17inch 36600-3DDJ0
NXH2524A -> NXH2A19A
HEV 1.6T-GDI 6AT 4WD 19inch 36600-3DDJ1
NXH2524A -> NXH2A19A
PHEV 1.6T-GDI 6AT 4WD 19inch 36600-3DAJ5
NXP1507A -> NXP2930A
TUCSON
PHEV 1.6T-GDI 6AT 4WD 19inch 36600-3DAJ5
PLUG-IN
#940 (HCU)
NXP1C17D -> NXP3127A
(NX4 PHEV)
PHEV 1.6T-GDI 6AT 4WD 19inch 36600-3DDJ5
NXP2524A -> NXP2A19B
TSB #: 23-EE-002H
Password
4120
4121
4122
4123
1319
2331
4124
4125
3193
1233
1438
7139
8153
1833
6517
8641
6158
8419
9997
Page 5 of 5
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