Could be - I'm tracking down a battery killing draw on my 82 car and it's pointing to the BT radio I put in the thing a few years back. Sometimes those electronics get selfish. There's nothing else in that car to draw power, other than the PCM or alternator (bad diode??)Another update. Tech called and said their “electrical guru” isolated the 2 amp draw to the radio. So, they have ordered new radio that will be here in 5-6 days. We’ll see if that’s the answer.
Could this be an issue still if the factory HU has been replaced? I've got the IA JL3001 HU and my JTM is currently at the dealer with two very dead batteries. I'm just curious, hopefully when I get it back tomorrow there won't be any other issues.It is not the radio. Your batteries went dead and went dead long enough the controllers on your jeep lost their source address sync. Think of it as a rolling garage door code. All the controllers including the radio have this code and it rolls with every key cycle. If the aux battery dies unexpectedly, the controllers can get caught out of sync. Sounds like the radio is out of sync and it it doing a "go fish" response until it gets a number that makes sense, and that draws power. The controllers can be re-synced using the starscan tool.
Did the new radio fix it?Another update. Tech called and said their “electrical guru” isolated the 2 amp draw to the radio. So, they have ordered new radio that will be here in 5-6 days. We’ll see if that’s the answer.
Yes if the replace ECM aka the radio in this case never gives an acceptable answer the code just keeps rolling and the request keeps coming. Unfortunately this request rests the power control module everytime and it lights up the batteries, until the whole thing just runs out of juice.Could this be an issue still if the factory HU has been replaced? I've got the IA JL3001 HU and my JTM is currently at the dealer with two very dead batteries. I'm just curious, hopefully when I get it back tomorrow there won't be any other issues.
So it's the same deal like with Mercedes cars, to swap out batteries you need to have the truck on a constant 12v supply, right?Yes if the replace ECM aka the radio in this case never gives an acceptable answer the code just keeps rolling and the request keeps coming. Unfortunately this request rests the power control module everytime and it lights up the batteries, until the whole thing just runs out of juice.
So they think the radio is defective and replace it. Then resynch it and it works. When in fact all they had to do was resynch the old radio.Yes if the replace ECM aka the radio in this case never gives an acceptable answer the code just keeps rolling and the request keeps coming. Unfortunately this request rests the power control module everytime and it lights up the batteries, until the whole thing just runs out of juice.
It is more the architecture of the system. All the ECMs on the link need to follow the protocol for the protocol to work. The radio is on the link.So they think the radio is defective and replace it. Then resynch it and it works. When in fact all they had to do was resynch the old radio.
Right? Ha.
What purpose is served by setting up a secure link between the radio and whatever else it needs to talk to?
Is it because the touch screen can be used to make important changes to the vehicle like traction and stability control settings?
All this complexity makes me wonder if in 30 years anyone will be able to keep vehicles of this era running. The mechanics are easy. I wonder if all the electronics will be "bricked" because there is no way to support them.It is more the architecture of the system. All the ECMs on the link need to follow the protocol for the protocol to work. The radio is on the link.
Security is one reason -What purpose is served by setting up a secure link between the radio and whatever else it needs to talk to?