ICU (Integrated Central Control Unit) Software Update (Service Campaign T6V) (SC T6V)

Publication date: 2021-07-31
Reference number: SC T6V
Supersedes refnos: 21-01-056H

ICU (INTEGRATED CENTRAL CONTROL UNIT) SOFTWARE UPDATE (SERVICE CAMPAIGN T6V)

SERVICE CAMPAIGN BULLETIN

Reference Number(s): 21-01-056H, Date of Issue: July 31, 2021

HYUNDAI:	2021 Elantra (CN7)
GROUP:	CAMPAIGN

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

WARRANTY INFORMATION

MODEL	OP. CODE	OPERATION	OP. TIME	CAUSAL PART	NATURE	CAUSE
Elantra (CN7)	10D101R2	ICU Software Upgrade	0.3 M/H	91951-AA010	I14	ZZ3

NOTE: Submit claim on Campaign Claim Entry Screen

NOTE: 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

NOTE: 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.

NOTE: 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.

NOTE:

In the ECU Upgrade screen, select ICU as the system to update.

GDS INFORMATION

	EVENT INFORMATION
MODEL	EVENT DESCRIPTION
Elantra (CN7)	"711.CN7 ICU (INTEGRATED CENTRAL CONTROL UNIT) UPGRADE"

ROM ID INFORMATION TABLE

ROM ID INFORMATION

MODEL	SYSTEM	ICU P/N	ROM ID
MODEL	SYSTEM	ICU P/N	OLD	NEW
Elantra (CN7)	ICU	91950-AA010 ~ 91950-AA990	1.05	1.06
Elantra (CN7)	ICU	91951-AA010 ~ 91951-AA590	1.05	1.06

MANUAL MODE PASSWORD INFORMATION TABLE

MANUAL MODE PASSWORD INFORMATION

MENU	PASSWORD
CN7 ICU 91950/91951-AAXXX	5051

SERVICE PROCEDURE

Select ICU as the system to update.
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.
Perform GDS software update. Refer to TSB 15-GI-001 for the tablet-based Mobile GDS ECU update procedures.
After the software has updated, check for Diagnostic Trouble Codes in the ALL menus and erase any DTC.
Confirm vehicle is operating normally.