A91 does not start.

[a80b2q]

Hello. I am repairing my A91 supra which I bought out of salvage auction. The main thing is that I wasn't able to start the engine since the car came (Starter turns the engine). I scanned all the errors with OBD2. Couldn't delete 5 errors which leads to DME and transmission faults.

After incident car transmission were engaged to neutral gear manually under the car by pulling the release switch. I can not engage in any other gear now. What can I do to make gears shift again?

Also engine DME fault shows:
“ 113027 Relay For Ignition And Fuel Injection, Supply: Open
Circuit“ and bunch of other faults. I do think these transmission and DME faults is the main reason I can not start the engine.
Can someone help me to figure all these faults out?
P.S. Attached screenshot of faults list. ??

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[zrk]

The car kills itself in an accident. Blows a fuse to provide power to some systems. Did you start with that?

It also seems like a lot of 'no message' stuff. Like CANBus is disconnected or severed or something. I'd start there.

 

[a80b2q]

Already tried to look for a blown fuse. But it seems like they are all okay.

Yes there are a lot of no message faults after scanned with OBD2, car shows around 5 or 6 'red' active faults on the screen. I really hope DME won't be demaged.

 

[zrk]

Already tried to look for a blown fuse

It's not the fuse fuse, it's the emergency battery thing. I forget what it's call and where it's located exactly. It hard kills some power.

edit: https://bimmerscan.com/bmw-battery-safety-terminal/

 

[Kmj442]

Its interesting that they say the starter works, I would have thought that that would have been killed by the safety terminal.

Depending on the severity of an accident incurred, the MRS control module will provide a signal to the BST which will disconnect the B+ cable going to the Starter & Alternator.

 

[a80b2q]

It's not the fuse fuse, it's the emergency battery thing. I forget what it's call and where it's located exactly. It hard kills some power.

Hmmm. Okay, I do not know that. Thanks. Will have to try to find it. Maybe thats why it finds so many faults if thre is no current going through.
It seems like the whole car has power everything works except for the engine gearbox or parking brake...

 

[a80b2q]

Its interesting that they say the starter works, I would have thought that that would have been killed by the safety terminal.

Thats what I thought. Lights, starter, infotainment works fine.

 

[Kmj442]

Thats what I thought. Lights, starter, infotainment works fine.

Made a quick edit, the link from zrk does say the starter should be disconnected if it was the safety terminal.

 

[zrk]

Thats what I thought. Lights, starter, infotainment works fine.

That's expected when the BST trips. Yeah, I'd replace it anyway? Maybe it didn't blow all the way/correctly. It seems like there's no power to the front of the car/front distribution box. Could probably check with a volt meter.

 

[Kmj442]

Could probably check with a volt meter.

Could check the + terminal thats in the engine bay and see if its getting voltage
next you could check to see if the plugs are sparking and I'd hope you checked fuel in the tank?
maybe check the fuel lines and see if there's fuel getting to the engine?

As for the codes, I don't know them well enough but really all an engine needs for it to "work" is fuel, air, compression, and a spark...it might not be the ideal settings but thats all it needs.

 

[a80b2q]

That's expected when the BST trips. Yeah, I'd replace it anyway? Maybe it didn't blow all the way/correctly. It seems like there's no power to the front of the car/front distribution box. Could probably check with a volt meter.

I will try to check BST tomorrow. There is posibity that maybe it won't burned all the way through. Will also try to test the volt up in the front. ?

 

[a80b2q]

Could check the + terminal thats in the engine bay and see if its getting voltage
next you could check to see if the plugs are sparking and I'd hope you checked fuel in the tank?
maybe check the fuel lines and see if there's fuel getting to the engine?

As for the codes, I don't know them well enough but really all an engine needs for it to "work" is fuel, air, compression, and a spark...it might not be the ideal settings but thats all it needs.

Yeah thats the basics what engine needs to run ? will try to look for a right voltage in the front of the car and go from there. Also can you hear fuel pump working į side or outside while starting the car?

 

[Sereph102889]

OP, there is a power fuse attached to the battery assembly that could be preventing it to start. The fuse blows in the case of an accident. There is a youtube channel that I've watched for years where these two younger dudes repair wrecked cars. Hopefully this link helps!


Edit: Just noticed I didn't URL copy the link at the perfect location, but they do eventually get to the point to where they show you what they do to start it. I believe it's only like 30-40 seconds after where the link starts.

 

[a80b2q]

OP, there is a power fuse attached to the battery assembly that could be preventing it to start. The fuse blows in the case of an accident. There is a youtube channel that I've watched for years where these two younger dudes repair wrecked cars. Hopefully this link helps!

Thanks. I already saw how they fixed this supra up. I noticed about this fuse they changed, but in my case starter works so I did not bothered of checking + terminal. Will check it either way now. It might be the problem. ?

 

[Sereph102889]

Thanks. I already saw how they fixed this supra up. I noticed about this fuse they changed, but in my case starter works so I did not bothered of checking + terminal. Will check it either way now. It might be the problem. ?

Hopefully it's the issue. I only posted this video because I remembered them saying that literally everything had power it just wouldn't turn over and it sounded exactly like your issue.

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