How Does an Ignition Interlock Device Work?
If you’ve been required to install an Ignition Interlock Device (IID) in Canada, you may be wondering: How does it actually work? Understanding the device and its operation can help you feel more confident and prepared as you complete your Ignition Interlock program.
At Smart Start Canada, we provide government-approved, reliable Ignition Interlock technology across the country and guide drivers through every step of the process.
What Is an Ignition Interlock Device?
An Ignition Interlock Device, often referred to as a car breathalyzer, is a small, compact device installed in your vehicle. Its main purpose is to ensure that a driver’s breath alcohol concentration (BrAC) is below the legal limit before the vehicle can start.
Smart Start Canada’s devices are designed to be easy to use and discreet, typically installed near the driver’s seat to avoid drawing attention while remaining fully functional. Before starting your vehicle, you simply blow into the mouthpiece. If your breath sample is within the allowable limits, the vehicle starts immediately. If alcohol is detected, the vehicle will not start until a passing sample is provided.
How an Ignition Interlock Device Works
The IID uses advanced fuel cell technology to measure BrAC accurately and reliably. It cannot be fooled by other substances, ensuring that every test reflects your true level of sobriety.
All breath samples, whether passing or failing are recorded and submitted to the appropriate provincial monitoring authority, keeping you compliant with court or provincial requirements.
Understanding Ignition Interlock Tests
There are two main types of tests drivers need to complete with an IID:
1. Initial Test
Before starting your vehicle, you provide an initial breath sample. Depending on your device, this may involve specific breathing patterns, humming, or a “suck-back” action. These steps confirm that a real person is providing the sample and help prevent tampering.
Once a passing sample is provided, your vehicle starts, allowing you to drive normally.
2. Random Rolling Retests
To help you stay on track and maintain safety, your IID may occasionally prompt you for random breath tests while driving, called rolling retests.
These retests are designed with your safety in mind they will not turn off your vehicle while you’re on the road.
If a retest is prompted, simply pull over safely before providing your breath sample. Following these prompts helps you remain fully compliant and keeps your program on track, giving you peace of mind as you continue driving responsibly.
Regular Device Calibration
Proper calibration is crucial for accurate and reliable testing. Provincial regulations in Canada typically require IID calibration every 30 to 90 days, depending on your device and local rules.
During calibration, a Smart Start Canada technician:
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Checks the device’s functionality
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Performs software updates
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Downloads data for reporting
Calibration appointments usually take 15–20 minutes and can be completed at any of our nationwide service centres. Smart Start Canada also provides temporary unlock codes if you need to drive to a service centre.
Support and Customer Care
Even though IIDs are designed to be user-friendly, questions can arise especially if this is your first Interlock program. That’s why Smart Start Canada offers 24/7 bilingual support, helping you with everything from device use to navigating provincial requirements.
If you’re unsure about any aspect of your Ignition Interlock program, our experienced team is just a phone call away.
Get Your Ignition Interlock Device Today
Ignition Interlock Devices help make Canadian roads safer by ensuring drivers are sober before starting their vehicles. With Smart Start Canada, you receive reliable, government-approved devices and compassionate, knowledgeable support throughout your entire program.
📞 Call 1-844-432-4776 or fill out our online form to schedule your IID installation and take the first step toward regaining your driving privileges safely and responsibly.