21-01-068H

GROUP
NUMBER
CAMPAIGN
DATE
Technical Service Bulletin
21-01-068H
MODEL(S)
DECEMBER 2021
NEXO (FE)
NEXO FCU SOFTWARE UPDATE
(SERVICE CAMPAIGN T7J)
SUBJECT:
 IMPORTANT
*** Dealer Stock and Retail Vehicles ***
Dealers must perform this Service Campaign on all affected vehicles prior to customer retail delivery
and whenever an affected vehicle is in the shop for any maintenance or repair.
When a vehicle arrives at the Service Department, access Hyundai Motor America's "Vehicle
Information Screen (VIS)" via WEBDCS to identify open Campaigns.
Description:
This bulletin describes the procedure to update the software of the Fuel Cell Control Unit (FCU).
The FCU update applies anti-surge logic during air purge and increases Hydrogen pressure.
Applicable Vehicles: Certain 2019MY - 2021MY Nexo (FE) vehicles.
GDS Information:
Event
Description
722
FUEL CELL CONTROL UNIT SOFTWARE UPGRADE (FCU)"
Warranty Information:
MODEL
Nexo (FE)
OP CODE
10D179R0
OPERATION
OP
TIME
CAUSAL
PART
FCU UPDATE
(Blue or GL)
0.3 M/H
39930-M5100
FCU UPDATE
(Limited or GLS)
0.3 M/H
NATURE
CODE
CAUSE
CODE
I3A
ZZ3
39930-M5110
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 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.
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
SUBJECT:
NEXO FCU SOFTWARE UPDATE (SERVICE CAMPAIGN T7J)
NOTICE
Verify that vehicle is affected by checking the vehicle’s FCU control unit ROM ID version
and referencing the ROM ID Information Table before attempting to update the control unit
software.
!
•
•
•
•
•
•
•
CAUTION
Run the fuel cell a sufficient amount of time to ensure that the 12-volt auxiliary battery is
sufficiently charged for the update. Turn off the vehicle after 12-volt auxiliary battery is
charged.
Ensure the 12-volt battery will not become discharged during the update by turning off all lights
and accessories, heater/air conditioner, fan, audio, heated seats, rear defroster, etc.
Do not leave the headlight switch in auto mode.
Before performing the update, set the POWER button to the ON position. To set the POWER
button to the ON position, press the button two times without pressing the brake pedal.
Do not start the fuel cell.
Do not turn OFF the POWER button during the update.
Do not disconnect any cables connected to the vehicle or GDS-M during the update
NOTICE
Confirm your GDS-M has the most recent software version. If not, connect the GDS-M Mobile to
an Internet port, open the GDS-M home page and select “Internet Update”. Refer to
www.hyundaitechinfo.com if necessary.
If you encounter GDS-M related problems, call the GIT Helpline at 888-437-0308.
!
WARNING
When the vehicle auxiliary 12-volt battery is lower than 12 volts, the GDS-M will trigger a Low
Battery Voltage Warning. If this Warning occurs, then perform A or B as follows.
A. Connect the battery to a fully charged battery jump pack or GR8 charger using “Power Supply
Mode” to continue the software update.
B. Select “BACK” to exit the SW update. Then, start the fuel cell and let it run with until the
auxiliary 12-volt battery is sufficiently charged. Return to the software update after charging the
battery.
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NEXO FCU SOFTWARE UPDATE (SERVICE CAMPAIGN T7J)
Service Procedure:
Connect the VCI-II into the vehicle’s driver side
instrument panel OBD-II port and verify the
device is operational.
Do not set up the trigger module.
NOTICE
•
•
GDS-M control unit upgrading operates with wireless communication ad Wi-Fi direct.
It is also possible to perform the update via USB cable between the tablet PC and VCI-II.
Ensure the tablet battery has reasonable charge before starting the update.
NOTICE
You must initially perform GDS-M FCU Update in Auto Mode.
If the ECM Update starts but then fails in Auto Mode, perform the update in Manual Mode to
recover.
A. Automatic GDS-M Update Procedure
1. Enter the vehicle’s information and on the next screen select ECU Upgrade.
Using the push button start/stop, ensure the vehicle is in the ON mode. Do not perform the
update while the vehicle is in the READY mode.
2. Select Auto Mode and then select System.
3. Read information and select ID check.
4. GDS-M will read the current vehicle ROM ID and check for the newest update event.
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NEXO FCU SOFTWARE UPDATE (SERVICE CAMPAIGN T7J)
5. Select the upgrade event.
5-2) "722. FE FUEL CELL CONTROL UNIT SOFTWARE UPGRADE (FCU)”
#722_FCU
6. If the low battery warning message appears,
then select the BACK arrow
and run the
fuel cell to ensure the battery is adequately
charged for the update.
7. Update (1/2) will begin and progress will be displayed on the bar graph.
8. Update (2/2) will begin and progress will be displayed on the bar graph.
9. After update (2/2) is complete, turn off the ignition for 10 seconds.
10. Turn the ignition to the ON position and press OK to continue according to information displayed
on the screen. Do not start the fuel cell. Do not put into READY mode.
11. Select OK on the final screen and the update is complete.
12. Check for any DTCs created by the update and clear the codes.
13. Start the fuel cell (READY Mode) to confirm the vehicle is operating properly.
After confirmation, use the push button start/stop and place the vehicle into the ON mode.
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NEXO FCU SOFTWARE UPDATE (SERVICE CAMPAIGN T7J)
NOTICE
•
•
Only perform the manual update if the automatic update fails.
If automatic update fails, turn the ignition off for about 10 seconds. Place it back into
the ON position to reset the control unit before performing the manual update
B. Manual GDS-M Update Procedure
1. Within the upgrade screen, select Manual Mode, then select upgrade event.
2. Select the control unit part number with reference to the ROM ID Information Table at the end of
this TSB. Then select Upgrade.
#722_FCU
3. Enter the password from the password table located at the end of this TSB and press OK.
4. If the low battery warning message appears,
then select the BACK arrow
and run the
fuel cell to ensure the battery is adequately
charged for the update.
5. Update (1/2) will begin and progress will be displayed on the bar graph.
6. Update (2/2) will begin and progress will be displayed on the bar graph.
7. After update (2/2) is complete, turn off the ignition for 10 seconds.
8. Turn the ignition to the ON position and press OK to continue according to information displayed
on the screen. Do not start the fuel cell. Do not put into READY mode.
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NEXO FCU SOFTWARE UPDATE (SERVICE CAMPAIGN T7J)
SUBJECT:
9. Select OK on the final screen and the update is complete.
10. Check for any DTCs created by the update and clear the codes.
11. Put the vehicle into READY mode to confirm the vehicle is operating properly.
ROM ID Reference Table
1. FCU
MODEL
Nexo (FE)
Blue
39930-M5100
MODEL
PCM P/No.
Nexo (FE)
Limited
ROM ID
PCM P/No.
39930-M5110
OLD
NEW
HFEFJNNPRS3-D000
HFEFJNNPRS5-D000
HFEFJNNPRS8-D000
HFEFJNNPRS9-D000
HFEFJNNPRSA-D000
HFEFJNNPRSB-D000
HFEFKNNPRS0-D000
HFEF0NNPRS1-D000
HFEF0NNPRS2-D000
HFEF0NNPRS3-D000
HFEF0NNPRS4-D000
HFEF0NNPRS7-D000
HFEF0NNPRS9-D000
ROM ID
OLD
NEW
HFEFJNNPAS3-D000
HFEFJNNPAS5-D000
HFEFJNNPAS8-D000
HFEFJNNPAS9-D000
HFEFJNNPASA-D000
HFEFJNNPASB-D000
HFEFKNNPAS0-D000
HFEF0NNPAS1-D000
HFEF0NNPAS2-D000
HFEF0NNPAS3-D000
HFEF0NNPAS4-D000
HFEF0NNPAS7-D000
HFEF0NNPAS9-D000
Manual Mode Password Information Tables:
EVENT #
MENU
PASSWORD
722
FE FCU 39930-M5100 (Blue)
5100
722
FE FCU 39930-M5110 (Limited)
5110
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