2023 Honda CR-V CMBS Warning Light On, DTC B2A60-99

Owners of certain 2023 Honda CR-V vehicles may experience an illuminated 'CMBS Warning Light is ON' on their dashboard, accompanied by a message indicating a 'Collision Mitigation Braking System problem. See your dealer'. This issue, identified by Diagnostic Trouble Code (DTC) B2A60-99, affects the Adaptive Cruise Control (ACC) system, causing it to stop working or cancel while driving. Honda Service Bulletin 23-022 provides the necessary steps for authorized technicians to resolve this problem.

Symptoms

If your 2023 Honda CR-V is affected, you may notice the following:

• The Adaptive Cruise Control system stops functioning or cancels unexpectedly while driving.
• A warning message appears on the Multi-Information Display (MID) stating: "Collision Mitigation Braking System problem. See your dealer".
• The 'CMBS Warning Light is ON' is illuminated on the instrument cluster.

Fault Codes / DTCs

The primary diagnostic trouble code associated with this issue is:

• B2A60-99: "Out of Automatic Correction Range for Misalignment of Multipurpose Camera Unit Image". This code indicates a problem with the calibration or function of the vehicle's multipurpose camera.

Diagnosis / Trigger Conditions

The root cause of the Honda CR-V CMBS warning light and DTC B2A60-99 is a calibration process failure within the multipurpose camera software. This software issue prevents the camera from operating correctly, leading to the malfunction of safety systems like the ACC and CMBS.

Technicians will connect to the vehicle's diagnostic system (i-HDS) to confirm the presence of DTC B2A60-99. If the code is present, the repair procedure outlined in Service Bulletin 23-022 should be followed. If the DTC does not clear after initial checks, further troubleshooting may be required.

Important Warnings for Owners

Honda has provided several critical warnings for technicians, which are also important for owners to understand:

• Do not use unauthorized tools: Technicians are explicitly instructed not to use the MongoosePRO VCI device for this service bulletin, as it is not an American Honda-approved tool. Using incorrect tools can lead to further issues.
• Warranty limitations: Unnecessary or incorrect repairs resulting from a failure to update diagnostic and reprogramming software correctly are not covered under warranty.
• Power supply is critical: The vehicle's 12-volt battery must be fully charged before starting any software update. A fully charged jumper battery must be connected and remain connected throughout the entire procedure to maintain a steady voltage. The GR8 battery charger should not be used as it does not provide the steady electrical current required.
• Risk of control module failure: Control module failure caused by improper completion of a software update (e.g., early key cycle, low battery voltage, disconnected DLC cable) is not covered under warranty. This emphasizes the importance of having the update performed by a qualified dealer.
• Do not interrupt the update: If an error occurs or the i-HDS diagnostic tool freezes during the update, technicians are instructed not to disconnect the battery or turn the ignition to OFF. Instead, they must reboot the i-HDS and restart the process.
• Avoid electrical operations: To prevent damage to the control unit, no electrical components (headlights, audio system, brakes, A/C, power windows, door locks, etc.) should be operated during the software update.
• Routine updates not covered: Warranty reimbursement for technician labor is not allowed for routine checking or installation of any available software update that is not specifically tied to a covered repair.

Repair Procedure Summary

The repair for the Honda CR-V CMBS warning light issue involves updating the multipurpose camera software to the most current version. This procedure must be performed by an authorized Honda dealer using specific diagnostic equipment and software.

1. Preparation: Ensure the vehicle's 12-volt battery is fully charged and connect a fully charged jumper battery to maintain stable voltage throughout the process.
2. Diagnostic Connection: Connect the i-HDS diagnostic system to the vehicle.
3. Software Update: Access the Honda ECU Reprogramming function within the i-HDS. Technicians will enter a repair order number and read vehicle information.
4. Camera Software Selection: Select the option to update the front camera software. The new program ID for the updated software is 8S102-3A0-A08.
5. Initiate Update: Confirm the update and allow the i-HDS to download and install the new software. The process involves prompts to turn the ignition switch OFF and then ON at specific stages.
6. Final Check: After the software update is complete, perform an all DTC check using i-HDS and clear any remaining diagnostic trouble codes.

Required Tools or Parts

To perform this repair, technicians require:

• i-HDS Software Version 1.008.008 or later.
• Honda ECU Reprogramming Software Version 3.0.6.0 or later.
• The new program ID for the multipurpose camera software: 8S102-3A0-A08.

Warranty Information

This repair is covered under warranty. The following operation numbers and details apply:

• Operation Number 7385A5: Update the front camera software.
  • Flat Rate Time: 0.2 hours
  • Defect Code: 03214
  • Symptom Code: 03217
  • Template ID: A23022A
  • Failed Part Number: 8S102-3A0-A06
• Operation Number 7385A5A: Do an all DTC check and clear.
  • Flat Rate Time: 0.1 hours
  • Defect Code: 03214
  • Symptom Code: 03217
  • Template ID: A23022B
  • Failed Part Number: 8S102-3A0-A06

Owners experiencing these symptoms should contact an authorized Honda automobile dealer to have their vehicle inspected and the software updated.

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Source: NHTSA ID: 10232250