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Old 04-27-2015, 04:04 PM   #1
rlsmith04
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2007 VUE Green Line
Default Becm

Hello!

The wiring on my coolant for the BECM were chewed through and the BECM ended up over heating and now it needs replaced. I made contact with a dealership and found that the part is about 650-700 USD. I'm looking to find a used one or a replacement part, but not wanting to spend that much money. Anyone know where I can find one or get a better rate on one?

Thanks! -- and before I forget I own a 2007 Saturn Vue hybrid green line edition.

(Battery Energy Control Module or Battery Disconnect Unit BDU is what the part is called by Saturn).

Bob

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Old 04-28-2015, 09:22 AM   #2
vasy
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Default Re: Becm

Crap. I'd still get a new one. I was in the similar boat with that part needing a replacement and with the 1st and 2nd generation modules having design issues you need to look for the 3rd generation and it has only been installed under the warranty so chances like winning a lottery. 1st and 2nd can be told by color 2nd and 3rd by part numbers only.
I was not able to locate Gen3 one in 3 month, went to dealer and negotiated the part down to $500 plus the upgraded wiring harness from ebay for $40 and modified old myself fan to fit the new plug as it was an extra $150 for no reason.
If the price you quote includes installation and programming, just go for it, it is a good price, if not, negotiate, this module is basically dealer only service item as it requires proprietary re-programing. You maybe able to save the labor charge on removing and re-installing but can be killed in the process if don't do it just right. I have full instruction on how to and can help out if you need.
And with design issues in the earlier modules, can't risk used as you are still gonna be out close to 1/2 after all and may still need to replace it again with the new unit.

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Old 04-28-2015, 06:40 PM   #3
rlsmith04
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Default Re: Becm

Thanks for the help... Sadly, as I don't really wanna chance death, I think I will have to leave it to the professionals since I'm a hillbilly mechanic at best... On another note, do you knwo the difference in fuel mileage you got by having the BECM vs not having it? Want to see if it would even be worth fixing in the long run as the ol' Saturn has 107000 miles on er.

Thanks again!

Bob

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Old 04-29-2015, 12:54 AM   #4
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Default Re: Becm

Quote:
Originally Posted by rlsmith04 View Post
Thanks for the help... Sadly, as I don't really wanna chance death, I think I will have to leave it to the professionals since I'm a hillbilly mechanic at best... On another note, do you know the difference in fuel mileage you got by having the BECM vs not having it? Want to see if it would even be worth fixing in the long run as the ol' Saturn has 107000 miles on er.

Thanks again!

Bob
I don't think the car can operate without it as it is also responsible for recharging your primary battery. Maybe GM can disable the system but I don't know about it.
Death can only happen if you don't disconnect the high voltage cables as told Sorry to hear about your mouse issue, darn rodents.

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Old 04-29-2015, 11:31 PM   #5
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Default Re: Becm

The BECM is in a metal box behind the rear seat. There is not any coolant that is anywhere near this module. It is air cooled.

In what part of the Vue is the damaged chewed wiring?

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Old 07-10-2018, 04:52 PM   #6
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Default Re: Becm

Hello
I have a 2007 Saturn Vue Hybrid that is going wonkers. When I start it it pops up all the gauges lights first battery, then cooling and ABS and Brake. It is not charging the battery as well checked with a meter. I tried pulling the codes but it is not reading the plug. Also when I start it I get a long session of Bells like I am reprogramming things. The battery and the Hybrid battery where replaced. It has 119k in miles and runs great till the battery issue. Noticed in older posts there is a jumper do I need this Also have an issue with the key not starting it as well sometimes and it will come out after it is started? HELP

Last edited by genealogyman; 07-10-2018 at 04:57 PM..

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Old 07-10-2018, 09:53 PM   #7
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Default Re: Becm

genealogyman, unless one or more former Saturn techs replies, you may be forced to see GM about these issues as it seems to be more than one problem being described.

Personally, I'm fascinated with hybrids and the extra sophistication of electronics. I am not familiar with troubleshooting Saturns Vue hybrid system and do not have service manual info to offer technical help. What I do know is using google to search for valuable info from every source available. In my opinion, at least two sources meet my desire to know something without service manual access (online subscription to either alldata or Mitchell); STUPIDMONKEY's reply in this link - https://www.2carpros.com/questions/2...vue-hybrid-fix and background info of basic hybrid operation - http://www.underhoodservice.com/powe...n-vue-hybrids/. If you are serious about diy repairs, alldata or Mitchell online access to service manuals are best otherwise visiting GM or a shop specializing in auto electronics and hybrids may be helpful.

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Old 07-11-2018, 02:24 PM   #8
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Default Re: Becm

I was hoping that Bern was still on from reading his post it seams he has a Vue Hybrid and has deal with the issues before. Thanks

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Old 07-11-2018, 03:54 PM   #9
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Default Re: Becm

You can try private messaging members. Many members may not check in regularly.

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Old 07-12-2018, 12:03 AM   #10
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Default Re: Becm

genealogyman A few questions and thoughts. Has your Vue a daily driven vehicle or has it been parked for some time? Has the 12 volt battery been maintained with a full charge? If your code reader won't power on then check the 20 amp AUX 1 outlet fuse in the underhood fuse block. After the Hybrid battery where replaced did it operate ok even if it was for a short time? When the Hybrid battery was it replaced has one part (black box) ? used part ? or 3 batteries inside the box only? One last very important question is, Is the starter generator (looks like big alternator) belt in place or is it shredded thrown off the starter generator pulley?

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Old 07-12-2018, 03:35 PM   #11
genealogyman
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Default Re: Becm

Well let me start (sorry) the car was a trade for a Hyundai I had. They had just took it in before I got it and did the recall on the Hybrid Batteries. It had prior to this been in non Hybrid mode and had been driven from Arizona to Tennessee. It still has the old Hybrid box but new batteries dealer #20960900.

The Starter Alternator belt is in good shape. I have ran all the fuses and they are all good.The Dealership said it needed a 20889879 Harness and a fan 25865610 I replaced the fan and it comes on when car is running. I removed the cover for the back board and for a time it will charge the 12 volt but still get all the lights and bells.

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Old 07-12-2018, 10:56 PM   #12
bern
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Default Re: Becm

When Recalls are performed they are as only what is in the contents of the written Recall.

So it seem like you may all need to replace the battery energy control module (BECM). But without code or test preformed I can not confirm BECM failure.

The 2007 Vue had a first generation BECM with a long wire harness that exits the BECM and run to the left of the vehicle behind the left rear trim panel. The BECM is in the smaller black box mounted to the back of the Hybrid battery box. Plenty of the first generation BECMs have been replaced. The second generation BECM had a short wire harness about 6" long to a connect behind the left rear corner of the Hybrid battery box. * Dose your Vue have a connector in this location?

All failed BECMs are replaced with a second Generation BECM (that have a short wire harness) If switching from 1st to 2nd gen BECM then the extension harness is need to make up the difference in length. The other difference is the connector style of the battery cooling fan. a replacement fan will have the 2nd gen style connector.

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