Tuning alternative ......yes its possible.

[stribo]

Sorry bud, I have mis-read what you put originally. My apologies.

Pin B8 is on the ecu and not on the OBD socket. There is not a wire that goes from the OBD socket to B8 on the ecu. You would have to install one.

Bugger, back to the drawing board. So is pin B8 redundant on a standard ECU? i.e. it doesn't connect to anything when the ECU is on the car.

[Dangerous Dave]

Bugger, back to the drawing board. So is pin B8 redundant on a standard ECU? i.e. it doesn't connect to anything when the ECU is on the car.

Indeed.

As far as I know it is not connected to anything. Its sole purpose is to enable bootmode. I remember reading a Volvo tech article on an ecu upgrade which used a bench device to update the ecu, so they must have designed it to be flashable, hence pin B8's function.

[stribo]

Indeed.

As far as I know it is not connected to anything. Its sole purpose is to enable bootmode. I remember reading a Volvo tech article on an ecu upgrade which used a bench device to update the ecu, so they must have designed it to be flashable, hence pin B8's function.

I'll find a lazy way of doing it, my speciality is lazy.

[MoleT-5R]

I like it.

So fit a wire from B8 to an unused obd pin. Hack the VAG cable by adding a wire and switch from the power in to the pin which will connect to the B8 on the obd socket.

So when you want to flash a binary, boost the vehicle battery somehow to 13.8V+, plug in the hacked VAG cable switch the switch to enable bootmode and turn on the ignition. Connect via the laptop and flash away. (don' forget to turn off any power sapping accessories i.e. interior lights, etc. and remember to remove the fan relay as it will run when bootmode is enabled)

Then you can switch the cable back to diagnostic mode by turning the switch off.

By the way, make sure you have a spare ecu in case things go wrong.....

It seems there isn't a plug and flash way as yet, there is still some fiddling to do before flashing (upping battery voltage, removing fan relay, etc.). Another way is to make a bench flashing box, so you can remove the ecu, plug it in, flash and reinstall in the car. Someone did make one, found a pic on VS, just made from an ecu box from a Volvo.

this bench unit looks an excellent idea, any link for the lazy ones (me basically and a few others who are lurking silently on the sidelines...lol) please Dave

[Dangerous Dave]

this bench unit looks an excellent idea, any link for the lazy ones (me basically and a few others who are lurking silently on the sidelines...lol) please Dave

Sorry bud, only found that pic on VS but no supporting info around it, must be somewhere on there though. It will have the same connections as on the Wiki page anyway, just a quicker way of connecting the ecu rather than having to plug individual wires onto it.

Here's another pic

[MoleT-5R]

Sorry bud, only found that pic on VS but no supporting info around it, must be somewhere on there though. It will have the same connections as on the Wiki page anyway, just a quicker way of connecting the ecu rather than having to plug individual wires onto it.

Here's another pic

got a spare ecu housing here on the donor car, could be time to get the soldering iron out and get constuctive and knock myself one of these up, so I can start my frankenmonster experiments.....

[cherry1809]

Well, I've been through all pages, and I reckon if I tip my head sideways my brain will dribble out...
If it all means that some people on here will be able to put a custom map on a standard ecu and be able to make the changes without spending a fortune, I'll be happy

[oblark]

I spent hours going through all the posts on VS & downloading the software only to find "tunerpro" will not open the downloaded bin files and the xdf files are pages of writing, I'm either doing something wrong or its the wrong files.

I'm I right in thing that you can solder a diode across two pins and that solve the immobiliser problem ?

[960kg]

Really interesting this thread but i do get muddled and am not quite into it myself...

I don`t know what info you all have but i can post up all the Signal Spec`s for every pin on the ECU for 850 4.3 and V70 4.4 just say and i`ll get on with it. At least you can save to your own computer.

[oblark]

Really interesting this thread but i do get muddled and am not quite into it myself...

I don`t know what info you all have but i can post up all the Signal Spec`s for every pin on the ECU for 850 4.3 and V70 4.4 just say and i`ll get on with it. At least you can save to your own computer.

That would be great

Electronics is not my thing, , I'm more heavy engineering

[960kg]

ok, i`m onto it....be a bit as i have to edit quite a few pages to get rid of crap!

[960kg]

Hope these help?

[960kg]

..........and 4.4

[T5frankie]

oh how i wish i understood any of this

[oblark]

oh how i wish i understood any of this

I`m just waiting for the part numbers for the ECU and what software is needed

And if any what needs to be done in re-wiring the ECU

[stribo]

I`m just waiting for the part numbers for the ECU and what software is needed

And if any what needs to be done in re-wiring the ECU

All the software is on the M4.4 wiki., you'll just need a VAG COM cable to connect if yours is OBDII, then some way of getting 13.8 V to pin B8

[oblark]

I`ve downloaded the software from M4.4 wiki alone with "tunerpro" but tried to download the xdf files

So what`s the bosch number for the right ECU ??

[stribo]

I`ve downloaded the software from M4.4 wiki alone with "tunerpro" but tried to download the xdf files

So what`s the bosch number for the right ECU ??

There are quite a few, as any M4.4 fitted to a turbo car will do. Have you downloaded the xdf and bin files?

[V70 Graham]

oh how i wish i understood any of this

It is interesting.....but not for the faint hearted.

[oblark]

There are quite a few, as any M4.4 fitted to a turbo car will do. Have you downloaded the xdf and bin files?

I`m sent a PM to a guy on ebay who is breaking a 98 v70 t5 so hopefully it`ll be the right ecu

I`ve downloaded the "bin" files but can`t download the xdf files all I can do is open them on line