2016 genesis, no cold start

[Lakeview 52]

It seems every time the outside temp drops below 0 the car won't start. Everything on the dash blinks and I hear a clicking. Replaced the battery and starter a year ago. It is garaged outside. Any thoughts.

 

[joegr]

Is it a rapid series of clicks?
How long does it sit between starts, and how long do you run it when it does start?
Maybe you should get a volt meter and watch the voltage before and while trying to start it.

https://www.amazon.com/KEWIG-Charger-Adapter-Colorful-Voltmeter/dp/B098JF13NC/ref=sr_1_4?crid=RZSDPDMYDSTU&keywords=car+voltmeter&qid=1643733990&sprefix=car+volt+meter%2Caps%2C205&sr=8-4

 

[Lakeview 52]

Is it a rapid series of clicks?
How long does it sit between starts, and how long do you run it when it does start?
Maybe you should get a volt meter and watch the voltage before and while trying to start it.

https://www.amazon.com/KEWIG-Charger-Adapter-Colorful-Voltmeter/dp/B098JF13NC/ref=sr_1_4?crid=RZSDPDMYDSTU&keywords=car+voltmeter&qid=1643733990&sprefix=car+volt+meter%2Caps%2C205&sr=8-4

Yes, it is a rapid series of clicks. I am retired and don't drive daily. The times that this happened the car sat for 2+ days before in very cold conditions. I have a multimeter. I have never had this type of problem with any previous cars. I will check voltage next time. Thanks

 

[SGilbert]

Lakeview, This section is for GV80's only. You should post in your model's area.

 

[Lakeview 52]

That's funny, I did. Maybe we need to check with the web administrator

 

[koala]

Do you have any aftermarket accessories drawing current while the car is off? ie: remote car starter or a dashcam?

It sounds to me like something is draining your battery. Colder weather will just exacerbate low-voltage issues.

 

[jimmy buoy]

That sound is probably your ignition's slave solenoid not getting adequate power while attempting to crank. If your battery passes a load test, then check that the terminals are tight on the posts. They can appear tight but the type of connector can appear tight but it isn't grabbing the post. Try turning/wiggling the connectors on the posts themselves by hand. You may find that they aren't connecting properly.

Oops - joegr has the right terminology in the next post. Starter relay - not Slave Solenoid is what I meant to say...

 

[joegr]

What I have seen with the rapid clicking with weak/low battery (not Genesis specific):

PCM applies power to starter relay. Starter relay applies power to starter solenoid. Starter solenoid pulls in (loud click), and applies power to the starter. Battery voltage immediately falls below 7.5 volts. (Starter motor does not have time to turn.) Regulated voltage to the PCM falls because 7.5 volts coming in is not enough. PCM goes into reset. PCM in reset removes power from starter relay which removes power from starter solenoid which removes power from the starter. Battery voltage immediately jumps back up above 9V (probably about 11V). The regulator to the PCM now has enough voltage coming in that it can provide a regulated voltage to the PCM (usually 5V). The PCM comes out of reset and powers the starter relay again. This process repeating gets you the rapid clicks.

 

[SGilbert]

What I have seen with the rapid clicking with weak/low battery (not Genesis specific):

PCM applies power to starter relay. Starter relay applies power to starter solenoid. Starter solenoid pulls in (loud click), and applies power to the starter. Battery voltage immediately falls below 7.5 volts. (Starter motor does not have time to turn.) Regulated voltage to the PCM falls because 7.5 volts coming in is not enough. PCM goes into reset. PCM in reset removes power from starter relay which removes power from starter solenoid which removes power from the starter. Battery voltage immediately jumps back up above 9V (probably about 11V). The regulator to the PCM now has enough voltage coming in that it can provide a regulated voltage to the PCM (usually 5V). The PCM comes out of reset and powers the starter relay again. This process repeating gets you the rapid clicks.

Long story short: Sum Ting Wong

 

[Jackman]

I'm having electrical issues wih Genesis 3.8 2016, Ultimate Package. New battery drains, sometimes overnight. Dealer checked for parasitic drain and said it was the radio head unit. $6,000 part replacement (Hyundai helped with cost although warranty is expired). Problem not fixed with new head unit. Now dealer says iBox is causing a 300 ma drain and wants to change that ($1,000+, Dealer hopes Hyundai will help again)). I'm happy with my Hyundai dealer, but find it hard to believe that Radio Head Unit and iBox both failing at the same time. Car is with dealer as I write... Any advice welcome.

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[joegr]

...Now dealer says iBox is causing a 300 ma drain and wants to change that ($1,000+, Dealer hopes Hyundai will help again)). I'm happy with my Hyundai dealer, but find it hard to believe that Radio Head Unit and iBox both failing at the same time. Car is with dealer as I write... Any advice welcome.

Perhaps the drain was the ibox all along, and not the head unit?
Anyway, I would what would happen if you just unplugged the ibox and didn't replace. AFAIK, all of the things that it does for you (if you are paying for the subscriptions) are going away at the end of this year anyway.