Honda Diagnostic Scans Position

Subject: Post-Collision Diagnostic Scan and Calibration Requirements for Honda and Acura Vehicles

It is the position of American Honda that all vehicles involved in a collision* must have the following minimum diagnostic scans, inspections, and/or calibrations done to avoid improper repair:

*A collision is defined as damage that exceeds minor outer panel cosmetic distortion.


Background On Scan Requirements

Honda and Acura vehicles include numerous electronic control systems, including those that operate safety and driver assist systems. Most of these systems include onboard self-diagnostics that monitor the state of health and/or rationality of input and output circuits. When monitored circuit values fall outside predetermined thresholds, DTCs may be set in one or more electronic control unit (ECU).

The mechanical forces encountered in a collision can damage electrical circuits and components in ways that are not easily diagnosed with visual inspection methods. Here are some other electronic control system self-diagnostic facts:


Diagnostic Recommendations

The recommended way to accurately determine the post-collision status of all Honda and Acura vehicle electronic control systems is with the i-HDS.

NOTE: Not all electronic control systems can be scanned using the i-HDS. For example, Honda LaneWatch™ and earlier model air conditioning and climate control systems have self-contained diagnostics that are not accessible using the i-HDS. For systems such as these, refer to the published diagnostic procedures in the appropriate service information available on the Honda Independent Repair/ServiceExpress website: (


Inspection/Calibration/Aiming Requirements

Safety and driver assistive systems that will require inspections, calibration, and/or aiming after collision or other body repairs include, but are not limited to the following:

After Reconnecting the 12-Volt Battery:

After collision repairs are complete and the battery is reconnected, some electrical systems may not operate properly. These may include, but are not limited to the following:

Since the reset procedures vary by vehicle and system, enter the vehicle information into ServiceExpress and search the keyword “Reset”. This search will retrieve a list of reset procedures required after parts replacement and/or a battery disconnect. Some reset procedures can be done without special tools. Others may require scan tool software.

Front Passenger’s Seat Weight Sensor – Inspections and Calibration:

These sensors control passenger’s front airbag operation and the PASSENGER AIRBAG OFF indicator based on the occupant’s weight. Like any scale, weight sensors are a precision device.

Driver Assistive System Aiming:

Some models use one or more of the following camera and/or radar based driver support systems that require software-based aiming and/or calibration to ensure proper operation after certain components have been removed and/or replaced:

NOTE: Rearview (backup) cameras do not require any aiming procedures after removal or replacement unless the vehicle is also equipped with the Multi-View Camera System (MVCS).

These procedures may require special tools and/or the i-HDS to complete. Refer to the service information for specific information.

The chart below shows damage areas where driver assistive system components may be located in close proximity. Collision damage in these areas should be given particular attention because certain repairs and/or parts replacement may require aiming procedures to be done.

Collision Damage Area Driver Assistive System Components Affected
Front Bumper and Grille Area Millimeter Wave Radar Unit
Front Camera (w/Multi-View Camera System)
Windshield Area Multipurpose Camera Unit
Front Passenger’s Door/Mirror Area LaneWatch™ Camera (Honda Only) Right Side Camera (w/Multi-View Camera System)
Driver’s Front Door/Mirror Area Left Side Camera (w/Multi-View Camera System)
Rear Bumper Area Blind Spot Information System Radar Units
Rear Camera (w/Multi-View Camera System)


How To Obtain Service Information, i-HDS Diagnostic Software and Interface Hardware

i-HDS software, as well as other service information, is available to independent repair facilities and others for use on laptop or desktop computer hardware. These may be purchased in three time intervals: 1 day, 30 days, and 365 days.

NOTE: The i-HDS software requires the use of a Bosch MVCI or Denso DST-i vehicle communications interface (VCI) device between the vehicle and your computer, which must be purchased separately. To purchase i-HDS diagnostic software and/or a vehicle interface device do the following:


Download Honda’s Full Position Statement