Bought, wrecked, rebuilding a 2009 LMM

[malibu795]

I was guessing so. Had to be somewhere that current was going. Check it again after sitting overnight. If it's somewhere around 10.5 to 11 volts then you lost one of the cells

Already replaced. They tested it at AZ, said "it needs charged and tested" told them it sat on a charger since 0400 till about 1830 today, it's dead, his reply.. yep. Got a brand new DLG-H6. Get the other side replaced in a couple weeks.

Having trouble with the scanners connecting via the OBDII port as well this evening.. crawl around it tomorrow

 

[malibu795]

Sent this to autel..
I have what appears to BCM issues on a 2009 GM vehicle. What platform (s) allows my to read/clear/function test BCM codes?
Ideally I'd like one that does not need a subscription but not agay subscription versions..

Her reply
I hope this message finds you well. Could you kindly confirm if your issue has been resolved? We're here to provide any additional assistance you may need to ensure everything is working properly for you
In which I sent

Sorry I thought I was pretty clear. I am asking what diagnostic platforms can read clear and function test a GM Body control module on a 2009 GM vehicle?
If it can do U and C codes that would be helpful

Maybe I'm corporate stupid

Got this back yesterday..

Thank you for reaching out to Autel Customer Support. We understand that you have an issue that requires technical assistance. We are here to help you resolve your concern as quickly and effectively as possible.

To ensure that we provide you with the best support, we recommend that you contact our dedicated technical support team. They are experts in diagnosing and resolving technical issues, and they will be able to guide you through the troubleshooting process.

You can reach our technical support team by calling +18552883587 Option # 3 then #1. They are available 9 AM-6 PM EST to assist you. Please have the following information ready when you call:

Your Autel product model and serial number.
A detailed description of the issue you are experiencing.
Any error messages or codes you have encountered.
If you prefer, you can also provide us with your best contact information, and one of our technical support specialists will reach out to you directly. To do this, please reply to this message with your:

Full Name
Phone Number
Email Address
Product Model and Serial Number
A brief description of the issue
Once we receive your contact information, we will prioritize your case and get in touch with you promptly to assist with your technical concern.

Thank you for choosing Autel, and we appreciate your patience as we work to resolve your issue.

I'm having issues with comms through the OBDII port, went for a test drive through family farm, dash just randomly goes dead then comes back

IDK if there are non-solid state relays in the BCM that would make said clicking noise?

 

[malibu795]

Was able to live stream data on my Innova, pulled a bunch of codes, tried to clear codes, lost comms, shut truck off, now it won't start.

Guess it's a good thing it's in my shop and im not out somewhere stuck

 

[malibu795]

Did pull BCM out.. opened the box, nothing blatantly obvious for the untrained eye..
Put it back together, and installed it, truck started and ran before it went to no start

 

[2004LB7]

I think you must have some chafed wires somewhere or a module on the frits thats messing with the canbus wires

 

[malibu795]

I think you must have some chafed wires somewhere or a module on the frits thats messing with the canbus wires

Disconnected the bats for 30m reconnected and it started..

IDK if the ECBM got damaged when I pulled it off the old abs pump or not..

Went through some snow drifts earlier, so now I've made a problem there

There's can bus wires that run all the way back to the ITBC

 

[TheBac]

As said above, probably chafed canbus wiring somewhere that has now become corroded, or a junction thats corroded.

 

[malibu795]

The video I posted has clicking noise that was times with PRDML lights going out, IIRC PRDML is can bus logic ran right?

And autel support is junk via email.

 

[2004LB7]

Don't know if you have this document but great for tracing down the serial data lines

 

[malibu795]

The rough plan, was start with OBDII port, I'd loose comms with it first before anything else indicated a problem.
I've got the charm link think Ron posted, through logic reminds me of aldata

 

[1FastBrick]

Well that sucks! Those can be a pain to trace.... Didn't you have rust in the front of the floor board area?

I don't know if it changed, but I remember in 07/08 they had issue with chaffing near the front floor board due to the way the wire was routed.

 

[malibu795]

Rusty floors? Never heard of her🫣

 

[TheBac]

Going to fix it "Bieri-style" with license plates or do you have a new floor pan coming?

 

[NC-smokinlmm]

I had a problem with my lmm and the harness on the drivers side floor if I remember correctly, or maybe is was my lbz I can’t remember. Whichever one it was, the chaffing was causing an intermittent no start.

 

[malibu795]

Going to fix it "Bieri-style" with license plates or do you have a new floor pan coming?

Right now it's this..

Was talking to Hicksville guys about buying a stripped cab with roof damage for 5-600.00 cut the whole floor out and scrape the rest. If I pull the parts I need 1/2/5 for the DS and 2/5 for PS

 

[malibu795]

I had a problem with my lmm and the harness on the drivers side floor if I remember correctly, or maybe is was my lbz I can’t remember. Whichever one it was, the chaffing was causing an intermittent no start.

Only wires thus far I've been able to get to do anything playing with them is wires off the OBDII port

 

[1FastBrick]

I had a problem with my lmm and the harness on the drivers side floor if I remember correctly, or maybe is was my lbz I can’t remember. Whichever one it was, the chaffing was causing an intermittent no start.

Probably your LMM. The wires run across a seam or something and it rubs through the insulation.

 

[1FastBrick]

Only wires thus far I've been able to get to do anything playing with them is wires off the OBDII port

What about the Mega fuse 175 amp on the fire wall? did it show signs of arcing or anything after the melt down?

Since you mentioned the OBD port and loss of CAN signal you can test it.

 

[malibu795]

I'm getting a burnt wire smell from somewhere inside the cab. When this happens

Source: https://youtube.com/shorts/1Ya4wLTB-8I?feature=shared

 

[malibu795]

Also 175A mega fuse and immediate looks good