2025 JLUR Remote Start Does Not Work

[Aonarch]

I have a Tazer JL Mini installed. Not sure if that is causing the issue or not, since I have ASS turned off.

Remote start from my fob and from the Jeep app does not work.

Is the Tazer to blame?

Anything that I am missing?

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[Wbino]

Do you have enough gas in the tank?
It won’t remote start if you’re low on fuel.

 

[T-Rob]

Also, one of your door latch mechanisms could have gone out. If it does, than the Jeep with think a door is open and you won’t be able to remote start. To tell if this is the case, open each door individually. If the inside light comes on, the latch is good. If it doesn’t come on, the latch is bad and needs to be replaced. I just went through that myself.

 

[Operative73]

I have a Tazer mini also, never had an issue with it nor with remote start.
Jeep manual:
1. gear selector in park
2. doors closed(T-Rob's comment may apply if they are in fact closed)
3. Hood closed(hood sensor could be bad like a door sensor)
4. tail gate closed
5. Hazard lights off
6. Brake switch inactive(nothing pressing the brake pedal)
7. Battery has sufficient charge
8. Panic button hasn't been activated since last start
9. System not disabled from previous remote start event
10. Vehicle alarm system flashing
11. Ignition left in stop/off
12. Fuel level meet min.
13. all removable doors not removed.
14. Malfunction indicator light not on

 

[Aonarch]

Hmm yeah I meet all of those parameters.

I'll try the door light test and see.

 

[Mifsuud]

Had remote start fail a year ago. Was tied to fob battery. When I got in the Jeep to start normally the dash has no fob detected message. Replaced fob battery and all good.

Remote start works in mine with a Tazer.

 

[Aonarch]

Also, one of your door latch mechanisms could have gone out. If it does, than the Jeep with think a door is open and you won’t be able to remote start. To tell if this is the case, open each door individually. If the inside light comes on, the latch is good. If it doesn’t come on, the latch is bad and needs to be replaced. I just went through that myself.

Checked and all good.

Key fob is fine. Its a 2025 as well.

I deleted my aux battery.... could that be the culprit? If so, no biggie. We can run ventilation without starting the engine, which is what I really am looking for.

 

[Operative73]

Hmm yeah I meet all of those parameters.

I'll try the door light test and see.

Have you had the doors off? Maybe the wire harness to the door isn't seated all the way..

 

[Aonarch]

Have you had the doors off? Maybe the wire harness to the door isn't seated all the way..

Nope never. I can inspect them.

Does the aux battery delete deactivate remote start?

But I don't think remote start worked before the aux battery delete...

 

[Operative73]

Nope never. I can inspect them.

Does the aux battery delete deactivate remote start?

But I don't think remote start worked before the aux battery delete...

I don't think the aux batt delete effects remote start, but i'm guessing. I did the aux delete and know my remote start worked before and after. When you did the delete you disabled ASS in the Tarzer, isolated the neg aux lead(if not removed all together) and pulled fuse 42?

 

[Aonarch]

I don't think the aux batt delete effects remote start, but i'm guessing. I did the aux delete and know my remote start worked before and after. When you did the delete you disabled ASS in the Tarzer, isolated the neg aux lead(if not removed all together) and pulled fuse 42?

Yup! Removed fuse 42, isolated the cables, and removed the battery.

 

[Operative73]

I can't think of anything else, assuming the Tazer reboot process went smoothly and as directed. If it were me I think I'd try going through the unmarry process, see if it works after the Tazer is removed from the equation. If remote start works after that, then that indicates is a Tazer related issue, if it doesn't then it's not. If remote start does work properly without the Tazer I'd try to reinstall the Tazer, see if the remote start fails to function again. This process will narrow down where the issue is, Tazer or the Jeep and may also correct some mystery hiccup that could have happened with the initial Tazer install. At the very least it gives you a direction to look into further.

 

[THAW]

7. Battery has sufficient charge

Hmm yeah I meet all of those parameters.

Are you sure about #7?

How did you confirm it? The ideal method is using JScan to check IBS SOC. If you don't have JScan try enabling ESS via the dash button; if after reaching operating temperature the engine doesn't shut down when the vehicle comes to a stop (and/or the Stop/Start EVIC display shows "Stop/Start not ready" without listing a reason) the Jeep thinks your CR[an]K battery SOC is below 65% (remote start possibly uses the same threshold, though I don't know for sure).

 

[Aonarch]

Are you sure about #7?

How did you confirm it? The ideal method is using JScan to check IBS SOC. If you don't have JScan try enabling ESS via the dash button; if after reaching operating temperature the engine doesn't shut down when the vehicle comes to a stop (and/or the Stop/Start EVIC display shows "Stop/Start not ready" without listing a reason) the Jeep thinks your CR[an]K battery SOC is below 65% (remote start likely uses the same threshold, though I don't know for sure).

Is there a way to reset the BMS? I changed to a H7 battery a few months ago. I can check voltage in a bit.

 

[THAW]

Is there a way to reset the BMS? I changed to a H7 battery a few months ago. I can check voltage in a bit.

There is a way to reset the BMS (kill power to it for a few minutes), but there's rarely a need to do so. It likely reset when you swapped batteries, and if it didn't it'll almost certainly be effectively recalibrated given the time frame of the swap.

In my experience, IBS SOC isn't directly correlated with voltage, so testing voltage won't necessarily help you properly assess whether remote start non-function is a result of the Jeep's estimate of battery condition.

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