Alright, so here's the story. I recently purchased a 2009 V8V Roadster from an auction and I'm in the process of rebuilding it. The car was in an accident that damaged the bumper, bumper bash bar, left fender, driver headlight, and hood along with separating the driver side tie rod from its socket. I've got most parts sourced already, so I'm well on my way, but I'm running into a few issues.



Both airbags were deployed, but I've got replacements and the module has been reset by airbagsystems in Texas, but it still needs VIN programming though so I'm not sure if that could be the cause on some of the high-speed CAN issues. So here are the main problems I'm running into:

1. No dash, no infotainment, no climate control working. The LCD will flip up momentarily every once in a while, and the green LCD shows USB pairing or something like that. The convertible top was moving at one point, but now does nothing.
2. ASM is showing an error saying it can't disengage from gear.

I've uploaded the scans I've pulled from the foxwell NT530. For the low-speed CAN issues, I think those are gremlins from the accident, but I'm not sure how to go about diagnosing those other than to go start digging up the modules to just see if they're unplugged which I find unlikely.

For the ASM issue, this one hurts the most as it's likely self-induced. When the car was delivered, I had it towed on a flatbed tow truck. When he got here, the battery was of course 100% dead and we couldn't figure out the Park Override for the V8V (found some videos for the DB9, but those didn't pertain to the ASM V8V). So we jumped the battery from the engine terminals which gave us power to put it in neutral. Once it was in neutral, I think the power was pulled from the jumpers and the car was never properly shut off. The errors being thrown are

• P0905 - Shift position signal wrong value
• P1734 - Failure to disengage current gear due to mechanical cause

Any direction on how to diagnose what's causing these would be greatly appreciated. And here's to hoping I don't have to drop my transmission to fix it.

 

good luck. How much do you have invested in the wreck?

 

I am new to the CANBUS error world, but my roof control module died and caused the problems that others have witnessed (can't turn off the electronics, no tach/speedo). Disconnecting made the errors go away. I pulled it apart and it's pretty clear that the lack of vibration dampening didn't help it, nor did the location.

If I was in your situation, I'd be disconnecting as many of the nonessential canbus systems as possible. The accident could have easily flexed/cracked a board and/or the connectors where they mate to the board.

YMMV and very bold of you!
Larry

 

I’m new to the AM world but have rebuilt my share of cars. The harness shown in the picture looks like it needs some love. Take care of that first, connect any modules, lights, sensors, etc and then see if you get any of the other systems back. I don’t know if any CAN modules or lines run through there but you should sort that out first. Good luck and keep us posted.

 

You are badass.

 

I got it for $16k plus fees, and I'm being pretty thrifty with my parts for repairs, but we'll see.

This is a great idea, I've been suspicious of the CRM from other threads, but when I didn't see it pop up on the scan I figured it might be okay. But if it's busted, it won't be reporting anyway. I'll give this a shot.

That was an old pic, I've since cleaned up the wiring harness in the front to make sure nothing is shorting out which cleared up a lot of the high-speed CAN codes. I've got the parts to rebuild it, but I'm waiting to have the bumper on to make sure I remake the harness at the correct length so it routes correctly. Here's how she sits today. I've currently got the rad drained and a small crack in the side tank plasti-welded back together, so we'll see how that holds. The AC compressor was banged up in the accident, so I've got a new one ready to go in, but when I had it out I noticed the power steering pump was making a mess. So I pulled the power steering pump and I'm in the process of rebuilding it, just waiting on the o-rings and seal to ship.



Just living the dream.

 

UPDATE: I pulled the CRM, unplugged it and it didn't make any difference. I then unplugged the cluster and climate control / infotainment individually to see if they made any differences. Nothing has changed, still getting no response from the system. The windows work and some of the lighting, but the roof won't move and the cluster is dead, and none of the buttons on the infotainment do anything.

I also checked the pins on the CRM and they all have continuity to the board, and nothing on the board looks visually broken for what it's worth. Sidenote on the CRM, no wonder they're failing, the board is just sandwiched in between two plastic pieces clamped together with some cheap plastic tabs riding directly above the rear wheel. No potting or anything. If I get everything working, I might have to go back and pot that myself.

 

Pyro fuse?

 

That was my first thought but I can't find any evidence of one on the V8V. If anyone knows the location, I'd certainly like to know.

 

ok. What about the BDS (battery disconnect switch? Is it deactivated? Does the module (part 7G43370397AB )have a yellow or orange connector that may have blown it? Check BDS fuse 7 (5amp) in the trunk box.

 

Is this by chance the previous owner in Colorado?

https://www.6speedonline.com/forums/...-s-manual.html

 

yes it is, I’ve already been in contact with the previous owner and he’s been great as far as getting me information on the car before it was in the accident. I’m lucky he’s in Denver as well, it’s not very often you get an auction vehicle from your own city.

 

Yup - I was going to mount my new one on rubber bumpers and isolate it. I wonder if Kierkert (the manufacturer) knows how AM mounts it.

Given the lack of power, i'd be doing what you are doing - tracing it from the battery up to the front, and from there to where it goes... Good luck!

 

UPDATE: SUCCESS!

It was fuse 46, a small 5 amper in the CEM box. I went through the entire wiring diagram in the shop manual looking for fuses connected to the battery switch or battery disconnect module. On page 765 I found this guy:

It was one of about 15 fuses and 3 relays I checked, and it happened to be the 2nd to last one. Once I replaced it, almost everything is working again. The dash is back, the climate control is responding, music is playing, the roof is trying to respond but is pissed that half the car is apart, and most importantly: the ASM is shifting!

The only thing left to chase down is to figure out why the infotainment screen isn't popping up. It's attempted to pop up maybe twice in the entire time I've had the car, so I'll take any leads on why that may be, but I'm guessing it'll be a similar process to diagnose.

Thanks to everyone for the advice, I think it really helped me narrow it down!

 

fantastic! I know this felt great!