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Vehicle Inspection

Relating to vehicle safety inspection.

How do I get my vehicle’s OBD system “ready”?

The vehicle should be driven under a variety of normal operating conditions in order for the OBD system to become ready. These operating conditions include a mix of highway driving and stop and go, city type driving, and at least one overnight-off period. Your vehicle owner’s manual should provide more specific information on getting your vehicle’s OBD system ready. For more information on readiness, please visit: http://dec.vermont.gov/ sites/dec/files/aqc/ mobile-sources/ documents/ Readiness.pdf

What are the possible reasons for failing the OBD check?

  1. The vehicle’s OBD system connector has been removed or is otherwise not working properly. The OBD check cannot be completed if the connector is missing or is not working properly. 
  2. The Malfunction Indicator Light does not illuminate at all when the ignition key is turned to the “on” position. When the vehicle’s OBD system detects a problem, it turns on the warning light to alert the driver to a problem. However, if the light cannot illuminate because the bulb has burned out or is otherwise not working, the driver would not be alerted to the problem. 

Why is the OBD check needed?

Motor vehicles are the largest source of toxic and ozone-forming air pollutants in Vermont. While modern vehicles are getting much cleaner due to newer engine management technology and emission control components, emissions stay low only when all these systems are working properly. OBD technology helps to ensure that vehicles are operating as designed, and the OBD check ensures that the vehicle’s OBD system is doing its job. 

What equipment is needed to inspect OBD Systems?

A scan tool with generic OBD II capability is necessary to perform the required check. A scan tool is a very useful device which is commonly used to assist in the diagnosis and repair of a variety of vehicle problems. Many inspection stations already own scan tools which can also be used to perform the required OBD check, but those inspection stations which do not will need to have one in order to inspect 1996 and newer vehicles. At a minimum, scan tools must be capable of :

Vehicle Inspections

Inspection stations in Vermont are privately owned and operated by our business partners. Inspection stations and certified Inspection Mechanics are licensed by DMV to conduct inspections as prescribed in the Vermont Periodic Inspection Manual.

Automated Vehicle Inspection Program (AVIP)

  • AVIP offers instant access to required inspection procedures and rejection criteria.
  • Rejection criteria can be instantly shown to a motorist.
  • Inspection Mechanics are able to immediately view previously identified vehicle component problems and failed inspections, prompting technicians to ensure proper repairs have been made. 
  • Inspection Mechanics and inspection station staff have immediate electronic access to bulletins from the DMV, and other information such as inspection-related forms.

ON BOARD DIAGNOSTICS (OBD II)

On board diagnostic (OBD) systems were developed in the 1980s by vehicle manufacturers to help technicians diagnose and service the computerized engine management systems of modern vehicles. A new generation of these systems, OBD II, is present on 1996 and newer vehicles. 

For more information on Readiness, Warranty, OBDII and Recall information visit vt-avip.com

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FAQs

Is there a grace period for Vehicle Inspection?

No

My vehicle did not pass inspection and it is the last day of the month. What next?

DMV recommends consumers do not wait until the last minute to get an inspection. Customers can take vehicles in for inspection up to two months before the inspection is due. Customers need to work with their mechanic/dealer to get vehicle repaired as soon as possible. Always carry the Vehicle Inspection Report (VIR) in the vehicle, showing that you are working towards compliance.

How do I get my vehicle’s OBD system “ready”?

The vehicle should be driven under a variety of normal operating conditions in order for the OBD system to become ready. These operating conditions include a mix of highway driving and stop and go, city type driving, and at least one overnight-off period. Your vehicle owner’s manual should provide more specific information on getting your vehicle’s OBD system ready. For more information on readiness, please visit: http://dec.vermont.gov/ sites/dec/files/aqc/ mobile-sources/ documents/ Readiness.pdf

What are the possible reasons for failing the OBD check?
  1. The vehicle’s OBD system connector has been removed or is otherwise not working properly. The OBD check cannot be completed if the connector is missing or is not working properly. 
  2. The Malfunction Indicator Light does not illuminate at all when the ignition key is turned to the “on” position. When the vehicle’s OBD system detects a problem, it turns on the warning light to alert the driver to a problem. However, if the light cannot illuminate because the bulb has burned out or is otherwise not working, the driver would not be alerted to the problem. 
  3. The Malfunction Indicator Light on the instrument panel is on (and/or commanded on by the vehicle’s on board computer) while the engine is running. This indicates that the OBD system has identified a problem which must be repaired. In this case, one or more diagnostic trouble codes will also be reported by the vehicle’s OBD system and these codes will help your technician diagnose and repair your vehicle. 
Why is the OBD check needed?

Motor vehicles are the largest source of toxic and ozone-forming air pollutants in Vermont. While modern vehicles are getting much cleaner due to newer engine management technology and emission control components, emissions stay low only when all these systems are working properly. OBD technology helps to ensure that vehicles are operating as designed, and the OBD check ensures that the vehicle’s OBD system is doing its job. 

What equipment is needed to inspect OBD Systems?

A scan tool with generic OBD II capability is necessary to perform the required check. A scan tool is a very useful device which is commonly used to assist in the diagnosis and repair of a variety of vehicle problems. Many inspection stations already own scan tools which can also be used to perform the required OBD check, but those inspection stations which do not will need to have one in order to inspect 1996 and newer vehicles. At a minimum, scan tools must be capable of :

  1. automatic initialization with any vehicle,
  2. determining readiness status of OBD monitors,
  3. determining malfunction indicator light status, and
  4. retrieving diagnostic trouble codes.

Any scan tool which complies with Society of Automotive Engineers Recommended Practice J1978 is acceptable. Scan tools are available from a number of well known equipment manufacturers.