2022 Hyundai Elantra Blind Spot Warning Software Update

Important Warnings

Hyundai has issued specific instructions regarding this service campaign, identified as TSB 22-01-038H:

• Dealers are required to 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 performing the update, technicians must initially use the GDS BCA Update in Auto Mode. If the BCA update starts but then fails in Auto Mode, technicians should perform the update in Manual Mode to recover.
• Before attempting the software update, technicians must check the current version of the left and right REAR RADAR ROM ID and compare it to the ROM ID information table provided in the bulletin.
• During the ECU Upgrade screen, technicians must select “RR RADAR (L)” and then “RR RADAR (R)” as the systems to update.

Symptoms

Owners of certain 2022 Hyundai Elantra (CN7) vehicles equipped with the 1.6T engine may experience one or both of the following conditions related to the Hyundai Elantra blind spot warning system:

• When driving, if the vehicle's "blind spot collision warning alert sound is on", it may not turn off even after the speed is reduced below 10 mph.
• When backing up or moving in reverse, if the "rear cross traffic collision audible warning sound is on", it may not turn off after shifting the transmission into Drive.

Diagnosis / Trigger Conditions

The persistent warning sounds for the blind spot or rear cross-traffic systems, even after the conditions for the warning have passed, are the primary diagnostic indicators for this issue. These inappropriate alerts signal the need for the software update outlined in Service Campaign 22-01-038H.

Warranty Information

For this service campaign, dealers should submit claims on the Campaign Claim Entry Screen using the following details:

• Operation Code: 20D013R1
• Operation: BCA UPGRADE
• Operation Time: 0.3 M/H
• Causal Part: 99140-AA130
• Nature: I3A
• Cause: ZZ3

If a part not covered by this campaign is found to need replacement during this service, and it is still under warranty, a separate claim should be submitted using the same repair order. For out-of-warranty parts, prior approval for goodwill consideration is required before performing work.

Software and Part Information

The software update involves specific ROM IDs and part numbers for the Blind-Spot Collision-Avoidance Assist (BCA) modules. The new part number change will only apply to the reading of the Global Diagnostic System (GDS) and does not involve changing the actual physical part.

ROM ID Information Table:

MODEL	SYSTEM	BCA P/N OLD	BCA P/N NEW	ROM ID OLD	ROM ID NEW
Elantra (CN7)	REAR CORNER RADAR (LH)	99140-AA110	99140-AA130	1.02	1.04
(1.6T)		99140-AA120		1.03
	REAR CORNER RADAR (RH)	99150-AA110	99150-AA130	1.02	1.04
		99150-AA120		1.03

Manual Mode Password Information Table:

MENU	PASSWORD
CN7 1.6T BCA LH 99140-AA110/20	0201
CN7 1.6T BCA RH 99150-AA110/20	1020

GDS Event Descriptions:

• "812.CN7 1.6T REAR CORNER RADAR LOGIC IMPROVEMENT (LH)"
• "813.CN7 1.6T REAR CORNER RADAR LOGIC IMPROVEMENT (RH)"

Repair Procedure Summary

To resolve the persistent Hyundai Elantra blind spot warning and rear cross-traffic alerts, a software update for the left and right Blind-Spot Collision-Avoidance Assist (BCA) modules is required. The procedure involves using the Global Diagnostic System (GDS) and following these steps:

1. System Selection: In the ECU Upgrade screen of the GDS, technicians must select “RR RADAR (L)” and then “RR RADAR (R)” as the systems to update. A visual example in the bulletin shows the GDS screen with these selections and the ROM ID information.
2. ROM ID Verification: Before proceeding with the update, technicians must check the current ROM ID of both the left and right rear radar modules and compare them to the "ROM ID Information Table" provided in the bulletin to ensure the vehicle is affected and the correct update is applied.
3. Software Update Execution: Perform the GDS software update. For detailed instructions on using the tablet-based Mobile GDS ECU update procedures, technicians should refer to TSB 15-GI-001.
4. DTC Check and Erase: After the software update is complete, technicians must check for any Diagnostic Trouble Codes (DTCs) in all relevant menus and erase them.
5. Operational Confirmation: Finally, confirm that the vehicle is operating normally, and the Hyundai Elantra blind spot warning issue is resolved.

Owner Action

If you own a 2022 Hyundai Elantra (CN7) with a 1.6T engine and experience the blind spot or rear cross-traffic warning sounds staying on, contact your authorized Hyundai dealership. This is a service campaign, meaning the software update should be performed free of charge. Dealers are instructed to perform this update on all affected vehicles prior to retail delivery and during any subsequent service visit.

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Source: NHTSA ID: 10214643