21-01-056H

GROUP
CAMPAIGN
Technical Service Bulletin
SUBJECT:
DATE
JULY, 2021
NUMBER
21-01-056H
MODEL(S)
ELANTRA (CN7)
ICU(INTEGRATED CENTRAL CONTROL UNIT) SOFTWARE UPDATE
(SERVICE CAMPAIGN T6V)
 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 "Warranty Vehicle
Information" screen (VIS) via WEBDCS to identify open Campaigns.
Description: Some 2021 Elantra (CN7) vehicles may exhibit a condition with multiple warning lights
displayed on the instrument cluster and various symptoms; multiple DTCs (Diagnostic Trouble Code),
reduction in power steering assist, and not able to shift out of Park. Possible DTCs set are:
•
C181287 – CAN Time-out Gateway
•
C181208 – CAN Time-out Gateway
•
C180581 – LKAS CAN Signal Error
•
C181887 – CAN Time-out BCA
•
B109052 – TCU Missing Error
This bulletin provides the service procedure to update the ICU (Integrated Central Control Unit) software
to resolve the conditions stated above.
Applicable Vehicle: Certain 2021MY Elantra (CN7)
Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair
SUBJECT:
ICU(INTEGRATED CENTRAL CONTROL UNIT) SOFTWARE UPDATE
(SERVICE CAMPAIGN T6V)
Warranty Information:
MODEL
OP. CODE
OPERATION
OP. TIME
CAUSAL PART
Elantra (CN7)
10D101R2
ICU Software
Upgrade
0.3 M/H
91951-AA010
NATURE CAUSE
I14
ZZ3
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.
ICU SOFTWARE UPDATE PROCEDURE
NOTICE
Check if the vehicle’s software version is affected:
• Check the current version of the ICU ROM ID and compare it to the ROM ID information table
listed below before attempting to perform the software update.
NOTICE
You must initially perform the GDS ICU Update in Auto Mode.
• Refer to the TSB 15-GI-001 for the tablet-based Mobile GDS ECU update procedures.
• If the ICU update starts but then fails in Auto Mode, perform the update in Manual Mode to
recover.
NOTICE
•
In the ECU Upgrade screen, select ICU as the system to update.
GDS INFORMATION:
EVENT INFORMATION
EVENT DESCRIPTION
MODEL
Elantra (CN7)
"711.CN7 ICU (INTEGRATED CENTRAL CONTROL UNIT) UPGRADE"
ROM ID INFORMATION TABLE:
MODEL
SYSTEM
ICU P/N
ROM ID
OLD
NEW
1.05
1.06
91950-AA010 ~ 91950-AA990
Elantra (CN7)
ICU
91951-AA010 ~ 91951-AA590
TSB #: 21-01-056H
Page 2 of 3
SUBJECT:
ICU(INTEGRATED CENTRAL CONTROL UNIT) SOFTWARE UPDATE
(SERVICE CAMPAIGN T6V)
MANUAL MODE PASSWORD INFORMATION TABLE:
MENU
CN7 ICU 91950/91951-AAXXX
PASSWORD
5051
Service Procedure:
1.
Select ICU as the system to update.
2.
Check the current version of the ICU ROM ID and compare it to the ROM ID Information Table
listed above before attempting to perform the software update.
3.
Perform GDS software update. Refer to TSB 15-GI-001 for the tablet-based Mobile GDS ECU
update procedures.
4.
After the software has updated, check for Diagnostic Trouble Codes in the ALL menus and erase
any DTC.
5. Confirm vehicle is operating normally.
TSB #: 21-01-056H
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