Drivers or fleet managers who want to install an interlock in a vehicle often start the consultation by asking only about the product price. However, an interlock is a device that controls whether the vehicle can start based on the result of the driver blowing into a handset, so the vehicle's ignition method, power conditions, and actual operating pattern need to be reviewed together. Even for the same vehicle model, what needs to be checked can differ by model year, add-on equipment, and maintenance contracts.
The purpose of preparing information before the consultation is not for the driver to decide on wiring or mounting methods. It is to let the installer review the vehicle's conditions and request the necessary checks from the people who approve changes, such as the vehicle owner, fleet manager, or leasing company. If you pass on what you know for certain separately from what you have not yet confirmed, you can reduce unnecessary document submissions and schedule delays caused by guesswork.
First, organize the information that identifies the vehicle
The starting point of the consultation is basic information that distinguishes the vehicle from others. Organize the manufacturer and model, model year, vehicle use such as passenger or cargo, and whether you can provide the license plate number. It is better to first confirm what the supplier actually asks for before assuming that the plate number or a full copy of the vehicle registration certificate is required.
The vehicle's ignition method and power conditions are also consultation items. However, if the driver does not know these exactly, do not fill them in arbitrarily; state your current level of confirmation, for example "needs confirmation by maintenance staff." That is because you cannot assume that all electrical configurations are the same based only on model and model year.
| Item reviewed in the consultation | Vehicle information to prepare in advance | What to write if you do not know yet |
|---|---|---|
| Vehicle identification | Manufacturer, model, model year, vehicle use | Confirm whether the plate number needs to be provided |
| Ignition and power | Ignition method, power-related reference materials | Needs confirmation by maintenance staff |
| Existing equipment | Names and managing parties of add-on equipment such as a digital tachograph | Whether equipment materials can be provided |
| Authority to modify | Owner, fleet manager, lease or rental contract relationship | Approving department or contract company to be confirmed |
Explain the interlock components and vehicle conditions together
An interlock can include a handset that measures breath and a control box that processes the test result and connects to the vehicle's start control. For example, DATECH's official AF-i1 guidance lists the components as the handset, the control box, a communication cable connecting the two, and installation wiring for the vehicle connection. The input voltage range of this product is also given, which helps explain why vehicle power conditions are checked during the consultation.
If the vehicle already has equipment that draws on vehicle power, such as a digital tachograph, a location tracking device, or refrigeration equipment, provide the equipment names and who manages them. Having such equipment does not by itself mean installation is impossible, but it gives the installer something to review in how the vehicle conditions relate to the existing equipment. It is not something for the driver to figure out how to connect or to handle personally.
When photos of the mounting location are needed, it is better to match the range the supplier requests. Include only the necessary parts of the vehicle interior in the photos, and cover personal information not needed for the consultation, such as people's faces, contact details, and trip documents. Rather than sending all the vehicle documents first, it is appropriate to confirm which identification details and photos are needed and then provide only those parts.
Change consultation questions to match the operating purpose
Post-installation management differs depending on whether the vehicle is a personal vehicle or one shared by several drivers in turn. For a shared vehicle, it is good to explain the number of drivers, whether there are rotating shifts, and where and when the vehicle is returned or handed over. Handover here does not mean an abstract work status; it means the situation in which, after one driver finishes a trip, the next driver or manager takes over the vehicle keys and responsibility for using the vehicle.
Frequent outdoor parking in winter and a lot of long-distance driving are also operating conditions worth passing on. The official AF-i1 guidance states that warm-up time can vary with temperature, so the environment where the vehicle is usually kept ties into the daily usage plan. You must not use this to conclude in advance whether a particular vehicle can have the device installed or when it can be driven; the actual device settings and vehicle conditions must be confirmed in the consultation.
As a hypothetical example, suppose a logistics company manager wants to introduce the device in three trucks of the same model. The manager assumes all three are the same model year and tries to apply the consultation result for one truck to the other two. But if one truck has separate operating equipment and another is a leased vehicle, the observed differences are signals that additional review and confirmation of change approval are needed. A possible action is to list each vehicle separately and mark its add-on equipment and ownership and management relationships. Consultation preparation can be considered complete only when, for all three trucks, installation feasibility, remaining documents to confirm, and the approving party are separated.
Confirm ownership and maintenance authority early
The person who actually drives the vehicle and the person who can approve changes to it may be different. For company-owned vehicles, the fleet manager or maintenance department may manage the conditions for changes; for leased or rented vehicles, the other party to the contract may. So it is better to note in the consultation request who owns the vehicle, who is responsible for maintenance, and who approves installation-related changes.
Without this information, you may not be able to set an installation date even when the vehicle information for the technical review is complete. Conversely, getting a "yes, it is possible" in the technical consultation does not mean the contractual approval for the change is done. Manage the vehicle condition review, contractual or internal approval, and installation scheduling as separate stages.
If there are requirements related to legally mandated installation, you can check what the relevant agency has announced separately and pass on only what is needed for the consultation. However, whether a particular vehicle is subject to a mandate, or what administrative effect applies, cannot be judged from this consultation preparation alone; those matters belong within the scope of drunk-driving laws.
Turn the consultation answers into next actions
When you request a consultation, separate confirmed and unconfirmed information within one document or message. For example, writing "model and model year confirmed, existing equipment names confirmed, ignition method to be confirmed by maintenance staff, lease contract change conditions to be confirmed" makes it easy for the installer to judge what else to request.
When you receive the answers, record the results in categories such as installable, additional materials needed, and additional approval needed. Receiving a quote does not by itself mean the vehicle compatibility review is finished. If the answer is "possible, with conditions," the next step becomes clear only when you also note which vehicle materials must be obtained by whom and what will be reviewed again after they arrive.
If you manage several vehicles, it is useful to keep results separately for each vehicle. What you confirmed on one representative vehicle can be the starting point of the consultation, but the power configuration, add-on equipment, and change approval conditions of other vehicles do not automatically become the same. The completion criterion for pre-consultation preparation is that, for each vehicle, the necessary basic information, operating purpose, existing equipment, approving person, and remaining items to confirm are separated and ready to pass on to the installer.
