2023-2026 Honda CR-V LKAS Warning Light in Reverse TSB 23-021

Honda Service Bulletin 23-021, superseding Version 1, addresses a specific issue affecting the Lane Keeping Assist System (LKAS) in certain 2023-2026 Honda CR-V and CR-V Hybrid models. This bulletin provides updated information regarding the affected vehicles, warranty claim procedures, software requirements, and the repair process.

Owners of affected vehicles may notice the Honda CR-V LKAS warning light illuminating under specific conditions, indicating a potential problem with the system.

Symptoms

The primary symptom of this issue is the "LKAS warning light is on when driving in reverse" message appearing on the instrument cluster. This indicates a malfunction within the Lane Keeping Assist System when the vehicle is backing up.

Diagnosis and Trigger Conditions

The root cause of the "LKAS warning light is on when driving in reverse" symptom is identified as false detection logic within the multipurpose camera software. This software error leads to incorrect readings or interpretations by the camera system, specifically when the vehicle is in reverse gear.

Repair Procedure Summary

To resolve the issue, technicians must update the multipurpose camera software to the most current version. The repair process involves several key steps:

1. Battery Preparation: Ensure the vehicle's 12-volt battery is fully charged. Connect a suitable battery charger (such as the Midtronics GR8-110P AST in Power Supply Mode, Midtronics DCA8-8000 in Reflash Mode, or Associated Equipment Corporation ESS 6100 100A Smart Charger in Power Supply Mode | DIAG+, 512EVO) directly to the battery. Maintain a steady voltage throughout the entire procedure.
2. Software Update: Update the PGM-FI software using the ECU Reprogramming Application with the Honda Antares Capsule (HAC). Technicians should refer to Service Bulletin 22-100 for detailed instructions on updating control units and modules.
3. DTC Check and Clear: After the software update, perform an ALL DTC CHECK to identify and clear any diagnostic trouble codes that may have been set during the update process.

Required Tools or Parts

Performing this software update requires specific diagnostic tools and software versions:

• Diagnostic Software:
  • i-HDS Software Version 1.012.019 or later
  • HDS Software Version 3.105.036 or later
  • Honda ECU Reprogramming 4.7.0.0 or later
• Battery Chargers/Power Supplies:
  • Midtronics GR8-110P AST (Power Supply Mode)
  • Midtronics DCA8-8000 Dynamic Diagnostic Charging System (Reflash Mode)
  • Associated Equipment Corporation ESS 6100 100A Smart Charger (Power Supply Mode | DIAG+, 512EVO)
• Reprogramming Hardware: Honda Antares Capsule (HAC)
• Affected Part Number: 39530-3A0-A21 (associated with the front camera software update)
• Software Program IDs (Current to New):
  • For 2023-2025 CR-V: Current 8S102-3A0-A08 to New 8S102-3A0-A130-M1
  • For 2023-2025 CR-V Hybrid: Current 8S102-3D4-A07 to New 8S102-3D4-A120-M1
  • For 2026 CR-V & CR-V Hybrid: Current 8S102-3A0-A230-M1 to New 8S102-3A0-A240-M1

Warranty Claim Information

For warranty claims related to this Service Bulletin 23-021, specific operation numbers and codes are provided:

• For CR-V models:
  • Operation Number 7385A5: CR-V: Update the front camera software (Flat Rate Time: 0.2 hr, Defect Code: 03214, Symptom Code: 03217, Template ID: A23021A, Failed Part Number: 39530-3A0-A21)
  • Operation Number 7385A5A: Do an all DTC check and clear (Flat Rate Time: 0.1 hr, Defect Code: 03214, Symptom Code: 03217, Template ID: A23021B, Failed Part Number: 39530-3A0-A21)
• For CR-V FHEV (Hybrid) models:
  • Operation Number 7385A5: CR-V FHEV: Update the front camera software (Flat Rate Time: 0.2 hr, Defect Code: 03214, Symptom Code: 03217, Template ID: A23021C, Failed Part Number: 39530-3A0-A21)
  • Operation Number 7385A5A: Do an all DTC check and clear (Flat Rate Time: 0.1 hr, Defect Code: 03214, Symptom Code: 03217, Template ID: A23021D, Failed Part Number: 39530-3A0-A21)

Important Warnings for Owners and Technicians

This bulletin includes critical information that both owners and technicians should be aware of:

• "Do not use the DST-i for this service bulletin as it is not an an American Honda-approved device."
• "Do not use the MongoosePRO VIC for this service bulletin as it is not an American Honda-approved device."
• "Warranty reimbursement for technician labor is not allowed for routine checking/installation of any available software update."
• "This update will not require entering a service bulletin number."
• "The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment, and training to correctly and safely maintain your vehicle. These procedures should not be attempted by 'do-it-yourselfers,' and you should not assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact an authorized Honda automobile dealer."

Owner Action

If you own a 2023-2026 Honda CR-V or CR-V Hybrid and experience the "LKAS warning light is on when driving in reverse" symptom, it is recommended to contact an authorized Honda automobile dealer. They have the necessary tools, software, and training to diagnose and perform the required software update as outlined in Service Bulletin 23-021. This will address the false detection logic causing the Honda CR-V LKAS warning light to illuminate.

Source: NHTSA ID 11029235