2023 Honda CR-V LKAS Warning Light in Reverse TSB

Symptoms

Owners of 2023 Honda CR-V vehicles may notice the "LKAS warning light is on when driving in reverse". This specific symptom indicates a potential problem with the Lane Keeping Assist System (LKAS) functionality. The illumination of this warning light is directly linked to the vehicle being operated in reverse gear.

Fault Codes / Related Information

While specific Diagnostic Trouble Codes (DTCs) are not explicitly listed in Service Bulletin 23-021, the document does provide internal codes used for warranty claims and identification. The defect code associated with this issue is 03214, and the symptom code is 03217. Various template IDs, such as A23021A, A23021B, A23021C, and A23021D, are used depending on the specific vehicle type and operation performed. The failed part numbers linked to this issue are 8S102-3A0-A06 and 8S102-3D4-A06.

Diagnosis / Trigger Conditions

The root cause for the "LKAS warning light is on when driving in reverse" in the 2023 Honda CR-V has been identified as false detection logic within the multipurpose camera software. This software error causes the system to incorrectly trigger the warning light when the vehicle is backing up. The issue is consistently reproducible under this specific driving condition.

Important Warnings

Honda has issued several critical warnings regarding the repair process for Service Bulletin 23-021. Technicians are explicitly instructed not to use the MongoosePRO VCI device for this service bulletin, as it is not an American Honda-approved tool for this procedure. Furthermore, if an error occurs during the software update or if the i-HDS diagnostic system freezes, technicians must not disconnect the battery or turn the ignition to OFF; instead, they should reboot the i-HDS and restart the process.

To prevent control unit damage, no electrical components such as headlights, audio systems, brakes, A/C, power windows, or door locks should be operated during the software update. Honda also states that control module failure resulting from improper completion of a software update (e.g., early key cycle, low battery voltage, disconnected DLC cable) is not covered by warranty. Lastly, warranty reimbursement is not allowed for routine checking or installation of any available software update, emphasizing that this bulletin is for specific symptom resolution.

Repair Procedure Summary

The corrective action detailed in Honda Service Bulletin 23-021 involves updating the multipurpose camera software to its most current version. This update aims to correct the false detection logic that causes the "LKAS warning light is on when driving in reverse" for the 2023 Honda CR-V.

Before initiating the repair, technicians must ensure the vehicle's 12-volt battery is fully charged. A fully charged jumper battery must be connected and remain connected throughout the entire procedure to maintain a steady voltage. It is crucial not to use a GR8 charger, as the vehicle requires a steady electrical current during the update process.

The update procedure begins by accessing the i-HDS diagnostic system and selecting the Honda ECU Reprogramming function. After entering the repair order number, the vehicle information is read. The technician then selects the appropriate software update option for the camera and initiates the update. During the process, the technician will be prompted to cycle the ignition switch OFF and then ON. Once the update is complete, the technician exits the reprogramming software. Finally, an "ALL DTC check" is performed using i-HDS, and any diagnostic trouble codes that may have been set during the update are cleared.

Required Tools or Parts

The software update for the 2023 Honda CR-V LKAS warning light issue requires specific diagnostic tools and software versions. Technicians must use i-HDS Software Version 1.008.008 or later and Honda ECU Reprogramming Software Version 3.0.6.0 or later. The update will install new program ID 8S102-3A0-A08, replacing previous versions such as 8S102-3A0-A060 or 8S102-3A0-A070. A fully charged jumper battery is also essential to maintain stable voltage during the reprogramming process.

For more information on updating vehicle systems, technicians can refer to service bulletin 01-026, "Updating Control Units/Modules."

Owner Action

If you own a 2023 Honda CR-V and experience the "LKAS warning light is on when driving in reverse," it is recommended to contact an authorized Honda automobile dealer. The dealer will have the necessary tools and software to perform the multipurpose camera software update outlined in Service Bulletin 23-021. This repair is covered under the normal Honda warranty, ensuring no cost to the owner for this specific issue.

NHTSA ID: 10232249