I just installed an iSimple Media Gateway PGHHD1 in a 2005 Honda Accord EX-L V6 AT. It's a seemingly pretty straight forward process - unhook the XM radio connector, plug that into the adapter's Y-splitter, and plug the adapter's male end back into the stereo. I did that, fired the car up, and it worked fine for about a minute before stopping.

Now, the car won't turn on. As soon as I turn the key to I ignition, the TCS and ABS lights come on, and there is a rapid clicking as all of the warning lights blink. The stereo doesn't power up at all.

I tried undoing the adapter and reverting back to stock, but it still won't start.

Any idea what could be wrong? I can't imagine that the battery suddenly went bad, but I also don't know what I could've done that would prevent the entire car from starting now.

Thanks for your help.

edit: The green immobilizer key indicator is flashing. I assume I've triggered an anti-theft measure? Is there a way to reset things without taking it to a dealership?

 

I would try another key first.

Maybe try disconnecting the battery for about 5 minutes to see if something in the engine computer needs to reset.

 

Tried both, still no luck.

When the immobilizer is active, how much power does the car actually receive? Because I can't even shift into neutral (without the override), nor are power locks, remote unlock, windows, etc. functioning.

 

It sounds like you blew a fuse. If you have a volt meter, there is a quick way to check them. See this video:

 

No blown fuses. I ended up jump-starting it and everything is fine. I haven't tried reinstalling the iSimple gateway adapter yet (I'm just content that I'll be able to drive to work tomorrow for the time being), but hopefully I'll be able to figure out what's going on with it soon. If so, I'll update my post for anyone else with similar issues, but I'd be welcome to any theories anyone has in the meantime.

 

You probably have a bad battery.