Complete and Catastrophic Electronic Failure While Driving - JeepForum.com
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post #1 of 10 Old 09-10-2019, 12:25 PM Thread Starter
jkstitt
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Complete and Catastrophic Electronic Failure While Driving

Hello - First time posting here. 2014 Jeep Grand Cherokee. Was driving on highway and first the sound goes out. The display screen didn't lock up or freeze, just the sound stops working. Then the climate control stops working and won't respond. Then I feel a bump like something is malfunctioning with the transmission. Then the radio/GPS display goes black. I get off the highway and everything that is possibly tied to the electronic system in any way starts malfunctioning and displaying on the dash and not working. Windshield wipers start slowly moving on their own. When stopped at the light the engine is hovering at a very low RPM nearly stalling the car. Then the power steering fails, ABS fails. The only thing running on the car is the engine. No electronics at all.

I manage to pull it over. Car won't shift into park because the entire transmission has failed. I put the emergency brake on. Car will also not shut off because the ignition is tied to the electronics. The car runs at a very low RPM for a few minutes and eventually just turns off.

As of now, nothing on it is responsive at all. Battery has power after being tested.

Towed to Jeep dealership and waiting on diagnostics.

Any ideas?

Thanks

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post #2 of 10 Old 09-10-2019, 01:10 PM
JeepCares
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Hi @jkstitt ,

We're sorry to hear that this happened! If you are in need of additional support while your Jeep is in service, please send our team a private message.

Darlene
Jeep Social Care Specialist
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post #3 of 10 Old 09-10-2019, 01:37 PM
ColdCase
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Off hand I don't recall the fix, but its been reported here before on a couple occasions. These computer controlled vehicles need good power or really weird things happen. Your symptoms suggests battery voltage slowly dropping off, and each module shutting down as its threshold is reached. Also there is a way to get the engine to shut down.

If I recall correctly, either the alternator was not charging the battery and it run down, or the battery itself failed. A bad AGM battery can test good. Compromised grounding in one case.

If no one jumps in here before I get back, I'll try to find the thread(s).

The dealer will connect his test set and should see a history of modules reporting low battery voltage. They should be able to quickly determine the cause.
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I just got lost in thought. It was unfamiliar territory;
Current: 2011 Grand Cherokee Overland V8, 2009 Liberty Rocky Mt V6
Previous: 2000 Grand Cherokee Laredo I6, 1979 CJ7 I6 Quadratrac
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post #4 of 10 Old 09-10-2019, 02:33 PM
emacca
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Yep totally agree battery or alternator
Simple test would be to hook up a good charged battery to the posts under the hood

Stupid thing with these cars is NO charge or battery voltage gauge, a major shortcoming in my estimation

the accessories drive belt can fail and you would never know
No charge no water pump next you would know as the car slows and motor seizes destroying its self

Bad decision Chrysler
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post #5 of 10 Old 09-13-2019, 05:34 PM
JKM
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agree....my vote on a 5yrs car is likely battery. Could be bad battery itself or a bad connection.
When you say "tested good", what test did you perform. If it was only voltage, then you need to do a load test to make sure the battery can withstand a load.

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post #6 of 10 Old 05-03-2021, 03:07 PM
Rabreid
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Hi, I have the exact same problem as you. I was driving 23rd December 2020 on a motorway here in Scotland with no hard shoulder & the car completely died on me. All the electronics wouldn’t go off & the engine was dead. Myself & my parents had to stand at the side of the road while cars were driving passed at 70mph! Had to be towed of the road by the police. The Jeep gave us no warning!

I took the Jeep to an independent garage they said they can’t fix it so then I took it to the local dealership. The dealership’s computer came back saying it was the crankshaft sensor. I asked the how it could be fixed & what the total cost would be? The couldn’t give me a final price. They said there could be other problems & the couldn’t give me a price until they started the work. Dealership was wanting me to just give them an open wallet!?!

I recently read that there’s a recall for Grand Cherokee’s from 2014 to 2018 it was being rolled out from October 2020. I took my Jeep to the dealership February & they didn’t say anything about the recall! I was charged 800 for them just to have a look at it with no mention of the recall!

I got a truck to take my Jeep to another independent garage as I couldn’t afford to just let the dealership keep taking money from me with out giving me a final price for the fix.

Safety recall article: https://chrysler.oemdtc.com/2724/saf...grand-cherokee

Where I’m I now with this issue? My Jeep has been off the road for 4 months and still is... the garage has replaced the crankshaft sensor & reluctor wheel, there are now no error codes showing on the computer. The Jeep starts for a little while then dies again... Costs so far are around 2000-2500 for the repairs, hours & trucks towing my Jeep to different garages and we are still having problems finding out what the problem is...

Does anyone know what the problem could be?
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post #7 of 10 Old 05-03-2021, 06:39 PM
Bilko
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is it Petrol or diesel? Most of the WK2s I have seen in the UK are the 3.0 CRDs. Either way the crankshaft sensor should not cause a catastrophic failure like this. It would pop your engine light and maybe go into reduced power or limp home mode but it shouldn't strand you.

If it's a gas engine it could be the fuel pump relay but a dealer should have worked this out in 5 mins. If it's a diesel check out the fuel pump and injector pump, even if it was one of these I would expect to see some codes.

As other OPs have posted, I would check the battery, alternator and grounding straps.

How old is the Vehicle? It's definitely worth reaching out to Jeep even if it out of warranty, In the UK there is fit-for-purpose legislation under the consumer goods act so you may have a claim regardless of the age of the vehicle.
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post #8 of 10 Old 05-03-2021, 07:09 PM
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I know the legal system is a bit different north of the border but initiating a claim in a Small Claims Court can "motivate" vehicle manufacturers to re-evaluate your case and it's essentially free as long as you have a justifiable and valid case and your claim is not considered friverless or vindictive.

I am not a lawyer so don't consider this to be legal advice:-) I have been living in the US for too long to think I even need to state this!
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post #9 of 10 Old 05-04-2021, 11:47 AM
Rabreid
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Quote:
Originally Posted by Bilko View Post
is it Petrol or diesel? Most of the WK2s I have seen in the UK are the 3.0 CRDs. Either way the crankshaft sensor should not cause a catastrophic failure like this. It would pop your engine light and maybe go into reduced power or limp home mode but it shouldn't strand you.

If it's a gas engine it could be the fuel pump relay but a dealer should have worked this out in 5 mins. If it's a diesel check out the fuel pump and injector pump, even if it was one of these I would expect to see some codes.

As other OPs have posted, I would check the battery, alternator and grounding straps.

How old is the Vehicle? It's definitely worth reaching out to Jeep even if it out of warranty, In the UK there is fit-for-purpose legislation under the consumer goods act so you may have a claim regardless of the age of the vehicle.
Thanks for getting back to me Bilko. It’s a diesel 2014. I’ve reached out to Jeep they said my Jeep is too old for them to help me!?! Yeah looks like I’ll be fighting to get my money back from the dealer I bought it from.

The Jeep dealership (Arnold Clark) & Jeep have had the worst costumer service I’ve ever experienced. Loved the Jeep when it was working. I can’t see me ever buying another due to no one here being able to fix them & Jeep’s costumer service.

The way it just died on the motorway is a massive safety risk & 4 months without my vehicle has cost me so much stress, time & money.
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post #10 of 10 Old 05-04-2021, 04:53 PM
emacca
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gees that sucks, "Rabreid"

but you probably need to post some more info
is there power to the vehicle, i.e. do lights work when in accessories mode does the radio work, simple one does the horn work

will the engine crank yes/no.

have you actually tried a NEW charged battery, can you remove the alternator and have it independently checked/tested.

you would imagine that taking it to a mechanic or to a dealer these would be the basics.

its scary how interconnected all the electronics are in these vehicles

good luck
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