Technical Support FAQ’s


Q:  What causes the device to register a fail?

A:  Anything registering a BrAC level above or equal to .025% in WA or 0.20% in OR. 99% of fails are caused by the IID sensing alcohol regardless of the source, whether ingested/consumed alcohol or commercial products that have been ingested or inhaled which contain alcohol such as mouthwash, Nyquil, perfume, etc. The other 1% of fails can be due to the introduction of a particle of food or liquid which gets past the mouthpiece and hits the sensor. This is due to eating or drinking around the time you are blowing into the IID.

Q: What happens if I fail a retest on the device?

A: When a Random Retest is failed the horn will start to honk (WA only) and the HS will beep until the vehicle is turned off. The device will display “Device in Violation”. The IID will go into a temporary lockout. When the time expires, you will be allowed to retest and can start your vehicle as soon as you are able to pass a test. 


Q: How will the device ask for a test?

A: The IID will beep to alert you to a requested test.  When the IID is preparing (warming up) for a test there will be a blinking blue light.  The blinking blue light will become a solid light during the 5 minutes available to take the test. Be sure to always look at the handset prior to turning the vehicle off.  If the light is blinking blue or solid blue, you should not turn the vehicle off but should go ahead and take the test. Even if you have already turned the vehicle off and you see the blue light, you must go ahead and test.

Q: How often will the device ask for a test?

A: After the initial test is taken and the vehicle is started, the first Random Retest will come up within the first 10 minutes of the vehicle being started. The law requires one Random Retest during each 45 minute block of time.  These will come up randomly between 10 and 45 minutes. 

Q: If I turn off the vehicle when it’s asking for a test what should I do? Am I still able to take the test even though I have turned the vehicle off?

A: You should turn the vehicle back on right away and take the test. If the test is completed within the 5 minute window there will be no violation (Retest Refusal).

Q: When device states “Analyzing Blow” what does this mean?

A: It means that the device is detecting alcohol. The longer the message stays on the screen, generally the higher the alcohol content for the IID to analyze.


Q: How often should I change out the mouthpiece?

A: The mouthpiece should be replaced at every 60 day service. It is your responsibility to have a functioning mouthpiece. You will receive 2 free mouthpieces at the time of installation.  You will also receive a new one at each 60 day recalibration. You should have 2 mouthpieces at all times so you have a replacement in the event one breaks. It’s a good idea to always carry a spare in your glove box.

Q: What can cause the mouthpiece to malfunction or break?

A: Eating or drinking just prior to taking a test can cause food or liquid to reach the sensor and cause a fail or can cause a particle of food to lodge in the mouthpiece so the air is restricted preventing you from completing a test and causing a retest refusal violation. If you are prompted to retest and you believe the mouthpiece is not working, you can quickly replace the mouthpiece with your spare and attempt to complete the test within the remaining allotted 5 minutes.

Q:  Is there a way to clean the mouthpiece between services?

A: To clean the mouthpiece:  (1) Clean with warm soapy water, (2) Rinse with warm water, (3) Tap the mouthpiece on a hard surface to clear most of the liquid, (4) Allow to dry overnight in a warm environment (house), (5) Return the clean mouthpiece to the vehicle so you have a spare at all times. 


Q:  I am having problems with the battery on my vehicle. How will this affect the interlock device?

A: A low battery or fluctuating power from the battery can cause several problems with the Interlock.

                1: Low or Dead battery: The Interlock Device requires at least 12 volts to power up, so it may not turn on if your battery is too low. If the device will not power on, but your radio and/or heater work, it’s likely that your battery is just too low to deliver the 12 volts the device needs to power on. Please try to get a jump for the vehicle to ensure a full 12 volts is getting to the device. If this does not work, please try to disconnect the negative battery cable from the battery for approximately 2 minutes and then reconnect. This may cause the device to power back on.

                2: Fluctuating power: Power fluctuations can be registered on the device as power losses if it dips below 12 volts. If there are 10 power losses to the device inside your standard monitoring period the device will go into violation mode as mandated by law and require early service.

Q: How will this affect my reporting?

A: Power losses are included in all reports sent to monitoring agencies. We cannot predict how your reporting agency will react to the data we send them, although with the large number of legitimate reasons why a device might lose power, we would hope your reporting agency would do some research into the cause of the power losses before taking action.

Q: Is it possible for the interlock device to drain my battery?

A: It is extremely unlikely that the device would be responsible for a drained battery. The interlock has an internal battery for when the vehicle is off and has a draw of only .01 Amps. This is less than the draw on a typical energy-saving light bulb.