High Voltage Interlock (HVIL) Loop Open Fault

[Leafnut]

Ok, so I got a call from the local Lucid tech here in Austin inquiring if I had experienced any problems with my Air GT as my car triggered an LVIL open loop alert seen on their system. Does anybody know anything about this fault? Is there a fire potential? Battery issue? I'm clueless what this means, so any help would be greatly appreciated!

 

[segbrk]

The HVIL is kind of like a circuit breaker. Anything weird happens on the HV circuit, it lets the other computers know. It doesn't immediately cut power like a circuit breaker in case you're on the road, but an HVIL fault usually triggers turtle mode or prevents you from driving again. It's not good. It's also pretty weird that Lucid knew about it before you, assuming you've used the car. I wouldn't panic and push it out of the garage, but that's worth getting to service (I assume on a flat bed) ASAP.

 

[Leafnut]

Thanks segbrk, it's scheduled to be picked up Tuesday. No loaner though, just an enterprise rental

 

[L-Dude]

I am impressed that: 1) Lucid was really on top of this; and 2) segbrk could bring such a cogent explanation of HVIL!

 

[Leafnut]

I am impressed that: 1) Lucid was really on top of this; and 2) segbrk could bring such a cogent explanation of HVIL!

Me too! I'm very impressed with their proactive response. I had zero warnings or faults or issues. My guest house/garage burned to the ground in a fire a few years back and rebuilt last year. I discarded a paper towel I used to wipe off wood stain and put it in the garbage can next to said garage. Apparently, it's not a good idea! So I'm paranoid about fires--I'm not keen on rebuilding this thing for the 3rd time and dealing with insurance. So, it's parked outside until Tuesday.

 

[L-Dude]

Me too! I'm very impressed with their proactive response. I had zero warnings or faults or issues. My guest house/garage burned to the ground in a fire a few years back and rebuilt last year. I discarded a paper towel I used to wipe off wood stain and put it in the garbage can next to said garage. Apparently, it's not a good idea! So I'm paranoid about fires--I'm not keen on rebuilding this thing for the 3rd time and dealing with insurance. So, it's parked outside until Tuesday.

I installed a smoke detector above my charger in the garage so I would know if something was going bad down there. I mean, that's where all my most flammable stuff is. But I don't see a lot of people mentioning it when talking about installing charger.

 

[DeaneG]

FWIW this is a suspected intermittent in the HV interlock connections, detected by the car's software, and is not likely to cause any kind of danger. If it persists, the car could give a warning while driving, then shut down.

The HVIL is responsible for shutting off high voltage to the car should it be in an accident or other catastrophe:

What Is HVIL?

High-voltage interlock loop (HVIL) protects people who come in contact with certain components of electric vehicles.

www.aptiv.com

 

[mark.leo]

LVIL open loop usually means a high-voltage safety circuit issue. Not always dangerous, but let Lucid check it ASAP.

 

[pjdcorp]

I installed a smoke detector above my charger in the garage so I would know if something was going bad down there. I mean, that's where all my most flammable stuff is. But I don't see a lot of people mentioning it when talking about installing charger.

I think that smoke detector is a great idea.

 

[Leafnut]

I think that smoke detector is a great idea.

Buying wired smoke detectors post construction can be difficult and expensive. However there are numerous affordable options for linked wireless detectors. Since garages tend to be far away from master bedrooms, make sure that your garage smoke detector is linked to detectors inside the home so you can hear it. My fire occurred at 2am and we heard nothing. It took only 8 minutes for the fire to burn a 2800ft2 structure to the ground. Luckily it was my detached guest house, but the fire dept said that my main house only had 2 more minutes and it would have caught fire due to the heat emanating nearby.