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Discussion Starter · #1 ·
2012 Cruze Automatic 1.4T - I've had the car myself for about 2 years. I had an issue with the car electronics acting funky and that was fixed with the negative battery cable recall. Car worked fine since that was done in November of 2015. The car was in the dealership for the ECM programming recall about 3-4 weeks ago, and now this past Sunday, the car freaked out on the highway. All the gauges died, all service lights came on, and the car lost power (step on the gas and you'd hit maybe 2500rpm). Pulled over and when I coasted down to about 5 MPH the car acted like it slammed into gear. I stopped, and shut it down, and ever since it fails to turn on. It doesn't attempt to crank. When you try to start it, the gauges do their self check and then all drop to 0 - the service stabilitrak, service traction control, service parking assist, etc all come on and flash. You hear a buzzing noise from the engine that sounds like the electronic break booster, but the car doesn't try to crank. Sometimes the radio comes on, sometimes it doesn't. Sometimes you can roll the windows, sometimes you can't. The dealer today said the code they pulled is saying no sensors or modules are communicating with the ECM, but they don't know why yet.

I don't know if this could be another negative cable issue, or if something with the ECM may have been damaged with the reprogram. Anyone else have issues after their recall and reprogram?
 

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For it to be the reprogramming, I'd think it would have to show up a lot faster than 3-4 weeks. As such, it's probably unrelated. The good news, it sounds like a "solid" problem. The dealer should be able to find it. (Nothing worse than a car that does that once every two weeks and then is perfectly fine on restart. Darn hard to fix that kind.)
 

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If the ecm had been damaged the problem would have been immediate.

Off the top of my head, a major circuit is opening the moment a load is applied......could even be a battery with a broken internal connector.

Connector (under the top cover) count is 5....6 cells, 2 external terminals.
When a fracture occurs, the connector will 'draw up' as it heats......we are talking thousandth's here, and the battery goes 'open'.

This results in total current loss........yet a test, usually taken with no load and cold connectors will show normal voltage.
The moment a load is introduced, the voltage will show 0.

Often, low draw components, such as a radio, sometimes some lights, will work......until more load is introduced....then, back to 0.

So, my first thought is a battery with a second thought along the lines of a main circuit interruption.

Rob
 

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Based on Robby's explanation, it begs the question: How old is the battery? Original equipment or replaced when? The secondary question is: Has the Special Battery Cable Coverage #14311 been performed on this car?
 

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Off the top of my head, a major circuit is opening the moment a load is applied......could even be a battery with a broken internal connector.
I could see that giving a tech the run-around, but I'd think the loss of all electrical power (for the tech) would be a big clue. Like going to crank and seeing everything die.
 

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Jim,

The OP had the cable replaced (first sentence) for the radio going nutz.

Rob
Opps, my bad. Missed it completely. Hopefully the new cable hasn't gone bad in the ensuing 5 months.
 

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I could see that giving a tech the run-around, but I'd think the loss of all electrical power (for the tech) would be a big clue. Like going to crank and seeing everything die.
Sometimes, even we go brain dead.......it's that, human thing.

Rob
 

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Sounds like a data line has dropped and no communication showing up with anything to me. I wouldn't think a battery would cause all that while driving IMO
 

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Sounds like a data line has dropped and no communication showing up with anything to me. I wouldn't think a battery would cause all that while driving IMO
An open battery while driving would mean the power from the alternator is no longer filtered. Major noise on the power system.

While battery is certainly possible, I'm not taking any bets against something like the ECM going south. Rare, but I won't say it can't happen. Or maybe a major screw up on the car's bus such that the BCM can't talk to the ECM.
 

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Discussion Starter · #13 ·
They seem to not be sure what it is. The service manager who updated me said the technician was "at a standstill" yesterday - not sure why nothing is communicating. I spoke with them this morning and they said I would have an update today, but they close in 40 minutes.
 

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They seem to not be sure what it is. The service manager who updated me said the technician was "at a standstill" yesterday - not sure why nothing is communicating. I spoke with them this morning and they said I would have an update today, but they close in 40 minutes.
Time to rattle their cage, eh?

Do they at least have you in a car?

Rob
 

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Discussion Starter · #15 ·
Time to rattle their cage, eh?

Do they at least have you in a car?

Rob
I called them and asked for an update - they still have no clue what is causing the systems to not communicate - "needle in a haystack." They said they can't put me in a car either until they confirm it is something under warranty or not. They said they will let me know when they have an update. Sounds like it is going to be there a while unfortunately. Trying to find a ride to and from work is proving to be troublesome.
 

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They said they can't put me in a car either until they confirm it is something under warranty or not.
I'm guessing you're outside of Bumper to Bumper. (3 year/36,000 miles).
 

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Discussion Starter · #17 ·
Still no update - Solid week with no answer on what's causing this. I'm afraid to see the diagnostic bill for this, let alone what the fix ends up being.
 

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Discussion Starter · #18 ·
Talked to the dealer yesterday - they were able to put me in a loaner car finally. They said they have decided it is either going to be an ECU replacement or wiring harness replacement. I asked if that was covered under warranty, but they said they didn't know and would be calling me today with an update, however I did not get a call today. Hopefully tomorrow I hear some good news. Day 9...
 

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Discussion Starter · #19 · (Edited)
UPDATE:

Dealer called this morning and told me it appears there was a fire in the engine bay which melted the wiring harness, melted an engine mount, killed the tcm and may have damaged the transmission, and also the radiator may need to be replaced. They do not know the cause of the fire- they said it MAY have been an overheating transmission, but have no way to tell. They can't test the transmission because it won't start still, and can't pull data from the ECM due to the melted data line. They told me to get insurance involved due to the fire.

I spoke with my insurance and they said basically anything damaged by the fire would be covered but not the component that started the fire. So if the tranny started it, it is not covered. Insurance wants more information as to damage and cost before they file a claim, and are pushing me to blame recalls and warranty work through GM. I relayed that information to the dealership and they said they needed to talk to their field manager to try and figure out what to do as they have not had this situation before.

Ugh.
 

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Call your insurance company back and tell them to get an adjustor out to the dealership ASAP. That's a bullshit response from the insurance company. I highly doubt the ECM reprogram caused this. While I agree this is very likely a component failure your insurance company, GM, and the dealership need to work out who's paying for what. At most you should be responsible for at this point is your insurance non-collision deductible.
 
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