An interlock is an alcohol interlock installed in a vehicle that controls whether the vehicle can start based on the result of the driver blowing into a handset. The AF-i1 consists of a handset that measures breath and a control box that handles the vehicle connection and processing, and it stores events during use, such as vehicle starts and test results, with date and time information.
When the device sounds or shows an alert while driving, the driver may find it hard to tell right away whether it is a device problem, a test request, or a service notice. However, not every interlock has in-drive retest requests or the same warning method. Rather than guessing what an alert means and operating the device while moving, it is safer to stop the vehicle safely first and then compare the alert message with the guidance for the installed model.
Driving actions to maintain before the alert
Even if you hear an alert tone or the display changes while driving, do not immediately move your eyes and hands to the device. The first thing to do is to keep controlling the vehicle as usual, watching the vehicle ahead, pedestrians, lanes, and the surrounding traffic, and to look for a place where you can stop. Reading the screen, pressing buttons, or attempting a breath test while driving can create a greater risk in the attempt to check the device's guidance.
Whether an alert shuts off the engine right away, or what you must do within what time, can vary by model and settings, so you must not act on assumptions that have not been confirmed. In particular, asking another person to blow in your place to clear the alert goes against the device's purpose and its tamper-detection function. The AF-i1 guidance describes a function that detects whether a person is testing directly, based on the temperature, humidity, speed, and strength of the breath.
Information to check after choosing a place to stop
After stopping in a safe parking space or a place that does not obstruct traffic, check the message on the screen and the time the alert appeared. Do not just check whether the alert stopped. It is better to also note the context, such as whether the alert appeared in a situation other than the pre-start test or whether it was the first occurrence during the trip. Instead of taking out your phone to take photos while driving, record only the screens you need after you stop.
The AF-i1 can store interlock usage events such as vehicle ACC, engine start, test results, and tamper detection. So even if you do not remember the screen message exactly, recording the time of occurrence and the vehicle's state helps narrow the search when the stored usage records are checked later. There is no need to share personal location data or unnecessary photos broadly; passing on only the information needed to check the alert is appropriate.
| What to check after stopping | What to record | Next action |
|---|---|---|
| Handset screen | The displayed message and the time the alert appeared | Compare it with the same message in the user manual |
| Vehicle state | Whether you were driving, and whether the indication remains after stopping | Report it to the fleet manager along with whether it repeats |
| Device usage history | How the alert relates to that day's pre-start test | Prepare to check the stored records with the dedicated software |
How to report without jumping to a cause
For instance, as a hypothetical example, consider a delivery driver who hears an alert tone from the handset while driving, stops in a nearby safe area, and finds an unfamiliar notice still on the screen. The facts to observe are when the alert sounded, whether the message remains after stopping, and how that day's pre-start test went. These facts alone do not allow you to conclude that the device has failed, that driving is restricted, or that the engine will stop automatically.
A possible action is to report the screen message, the time, and the fact that the vehicle is stopped to the fleet manager or the device support channel, and to check the official guidance for that model together with the stored records. Even if deliveries remain on the schedule, avoid setting off after the driver decides on their own that an alert they do not understand has been resolved. The completion criterion in this situation is not that the alert tone goes away but that the meaning of the alert and any action needed before further driving are confirmed against the installed model's guidance.
Treat repeated alerts as fleet operations data
If the same indication keeps recurring in the same vehicle, consider not leaving it to the driver's memory but collecting, per vehicle, the time of occurrence, the displayed message, the stage of the trip, and the action taken after stopping. The AF-i1 lets you manage and download usage event records through dedicated software, and it also provides inspection and calibration reminders. However, interpreting the stored records and configuring how the device operates must be done within the scope of the guidance for the device actually installed.
Rather than telling drivers to "operate the device immediately when an alert sounds," managers should explain in advance what information to record and whom to report to after stopping safely. If you also set the channel that decides whether a trip can continue and the procedure for a replacement vehicle or a schedule change, you reduce the pressure on site to hide an alert or deal with it hastily.
Points to separate in pre-trip training
Responding to an in-drive alert is not something to practice on the road. In training, explain with the vehicle stopped what roles the handset and control box play, where to check the screen message, and how to report the time of occurrence, and make clear the principle that a safe stop comes first while actually driving.
Conditions that can change the device's preparation time, such as winter, should also be considered before departure. The official AF-i1 guidance states that warm-up time can vary with temperature. Rather than turning this into an arbitrary response time for in-drive alerts, link it to an operating practice of allowing enough preparation time and completing the pre-start test before departure.
