Chipclifford
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Trying to locate the tcm. On my 09 Cabillac escalade hybrid.
09 cadillac escalade hybrid.
- Thread starter Chipclifford
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@Chipclifford Moved you here from intro section.
Welcome from Miami&NYC!
Welcome from Miami&NYC!
Chipclifford
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Long story, swap out the transmission, didn't reprogram it?It started and ran fine.We took a trip with it.Got back and then things start to glitch swapped out the body control module,ecm,sdgm, using the tech 2 all of the vid numbers all match went to reset everything on the modules everything reset but the tcm would not, replace the hybrid battery. pack Also still nothing question. I have beans I've been working on this for quite some time. Could the hybrid pack be too low? I haven't had a chance here to check on my scan tool. What the volts are? Thoughts.
Chipclifford
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Also I still do have my old transmission.Which worked fine?It was getting high on miles so I swapped it out.I still have that module that I could swap into this one.
Technically you should be able to swap the tcm from old to the new, do the reset trans adapts and be OK. I've not don't it thou, what I have done with update the software in my tcm from gm's website. I think you can Google acdelco updated and it comes up. using the OBDx pro gt dongle for 150$. that allows your lap top to interface with the tcm thru the obd2 port. and 45$ to license the vin thru gm for 2 years access.
I might go that route if I was you.
definitely need to check those hybrid battery cell voltages and if it runs, idle it for a while to keep it charged or remove the battery cable. that's why they put the quick connects on the 12v battery. in the owners manual it tells yoh when you should disconnect it for being parked
I might go that route if I was you.
definitely need to check those hybrid battery cell voltages and if it runs, idle it for a while to keep it charged or remove the battery cable. that's why they put the quick connects on the 12v battery. in the owners manual it tells yoh when you should disconnect it for being parked
Chipclifford
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Yes, I bought the software for a year. Like I mentioned , I reset all of the other modules but when i came to the TCM. It wouldn't let me go all the way which I'll find out here tonight. If the battery in the hybrid is too low which it might be before I could get that kind of clicking sound when it tries to start. But I haven't had it running for quite sometime Going through all these modules.. I keep you posted things for the help here.
Chipclifford
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ahh. yeah the gm software is a mess. I had to watch a bunch of YouTube on it. it fails often and then all of a sudden works for no apparent reason. but you definitely gotta put a charger on the 12v battery while doing just about anything to these trucks that has the key on engine off. they kill a 12v really quickly with the key on. I did it myself even knowing better while doing brakes. when I put my amp clamp meter on it to test. it pulled something like 20 amps form the 12v with the key one click forward, not even with the dash lite up. gm calls for a 12v voltage maintainer, because a changer isn't always clean DC. they can have some ac ripple. a battery doesn't care while being charged but the vehicle electronics can.
I used a charger anyways, as it's all I had handy. but just info as to why they call out a maintainer. the update can fail for a many reasons, the 12v battery being low is definitely one of them. the hybrid battery maybe, but without a load on the nickel metal hydride cells, they always look OK. their voltage crashes under load if not changed up but can look good at rest even when dead or damaged. so I doubt that's failing your update, but it can definitely be why it won't crank.
I missed that you said you had a tech 2 and got it to work for a flash. that's good work. the tech 2 will allow you to get into jump assist mode. where you put a battery charger on the 12v and it will use the inverter to charge up the hybrid battery. it is very slow, so may take hours. 12v at 20amps turns into 330v at some milliamp charge rate at the hybrid battery. but it does seem to work, but can be finicky to active the mode. there's good direction pop up if you search for hybrid tahoe jump assist
definitely keep us posted
I used a charger anyways, as it's all I had handy. but just info as to why they call out a maintainer. the update can fail for a many reasons, the 12v battery being low is definitely one of them. the hybrid battery maybe, but without a load on the nickel metal hydride cells, they always look OK. their voltage crashes under load if not changed up but can look good at rest even when dead or damaged. so I doubt that's failing your update, but it can definitely be why it won't crank.
I missed that you said you had a tech 2 and got it to work for a flash. that's good work. the tech 2 will allow you to get into jump assist mode. where you put a battery charger on the 12v and it will use the inverter to charge up the hybrid battery. it is very slow, so may take hours. 12v at 20amps turns into 330v at some milliamp charge rate at the hybrid battery. but it does seem to work, but can be finicky to active the mode. there's good direction pop up if you search for hybrid tahoe jump assist
definitely keep us posted
petethepug
Michael
Hey Welcome! Glad to see you visited from Cadillac land.
