Disco 2 Manual/Tiptronic gearbox

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Got it, thought that would be the case. Your help is invaluable. cheers. Will let you know how i get on, V8 ecu just arrived and will fit it this weekend, I hope.
 
Morning guys, IT WORKS!!!!! 🤣😂😁 When switched off it works as normal and ECU controls everything and when switched in, perfect. Locksup in any gear and it does change quite smoothly. I had no success with the V8 ECU. It made no difference to the when the gears changed, so kept the original ECU. see attached for anyone who would like to try. and thank you all for your advice and help, I could not have done it without you.
 

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  • Disco 2 Auto box wiring Index.jpeg
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  • Wiring for TC Lockup Final.jpg
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Iwandavies351 said:
Morning guys, IT WORKS!!!!! 🤣😂😁 When switched off it works as normal and ECU controls everything and when switched in, perfect. Locksup in any gear and it does change quite smoothly. I had no success with the V8 ECU. It made no difference to the when the gears changed, so kept the original ECU. see attached for anyone who would like to try. and thank you all for your advice and help, I could not have done it without you.
Click to expand...
Of course it works 💪
Just for interest here is the switch I use
 

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Cool, I used a small flip switch and placed it next to the window buttons. It should light up, but for some reason it does not, might need to feed a separate supply to the light on the switch. But great, it's like driving a different vehicle.
 
DrecklyD2 said:
You’ll need a switch, some wire, and a standard 30amp relay.
The reason for using a relay instead of a large resistor is it acts as a fail safe for the TCU. Even though you have manually energised the TC lockup the TCU still thinks it’s in control and will when it thinks it’s right will energise the TC. If a resistor is used it will short and put it in limp mode. So the TCU thinks it’s doing its job as it should.
The other reason is the TCU is constantly monitoring the system, if you splice in or cut the TC wire it will throw a fault and again enter limp mode. With the relay connected the TCU sees this as a connection to the Solenoid Valve as thinks all is well. Ok now I have bored the hell out of you here’s what you need to do.
1. Find pin 32 on the TCU, cut this wire but not too tight to the TCU.
2. Connect the wire from pin 32 to one of the pins on the relay. Either the + or - that energises the relay.
3. Connect a wire from the opposite side of the one you have just connected on the relay and splice it in to the wire on pin 53 which is the power supply to the solenoids. This connection allows the self diagnostics to see what it thinks is the solenoid valve.
4. Connect a length of wire to the wire that was connected to pin 32. Connect this to one terminal on your switch and the other to a good earth.
5. When you operate the switch you are supplying a direct ground to the TC solenoid valve which will energise it and lock your TC. You can do this in any gear, but don’t let it change gear when locked.
I hope all this makes sense, but let me know how you get on and if you have any questions please feel to ask.
Cheers
Tom.
Click to expand...
Hey Tom, love the forum and love the setup for lockup. I did it as well and it worked which was amazing but I always had the M and S lights on first start and I'd have to clear the code but now the code isn't clearing and the M and S light is always flashing and my lockup isn't working even tho everything is wired up how you've shown. I've got the 30amp relay so I'm just not sure? Can you please give me some advice if you have any.

Thanks
Logan
 
I'm sure that you missed something cos i made that mod to a friend myself and it works without any fault code so double check what you did there cos any small mistake would mix up the whole thing, take pics about your work and post them here maybe something is visible
 
sierrafery said:
I'm sure that you missed something cos i made that mod to a friend myself and it works without any fault code so double check what you did there cos any small mistake would mix up the whole thing, take pics about your work and post them here maybe something is visible
Click to expand...
Well here's a photo of my first setup, I'm obviously going to clean it up but I just wanted to get it working first ahahaha the relay is connected to the ecu TC wire and the other side is going to pin 53 wire. The TC wire side is hooked up to my switched ground.
 

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I dont see too much there ...one side of the "load" relay's coil should be spliced to an orange/ light green wire which seems that your's is other colour ...provided the other side is to grey/orange... do exactly the setup with two relays according to the diagram in post 64 and it should work
 
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Hi Logan,
Looking at the pic, is your relay connected right? When i first did the MOD. I didn't have the relay fitted and i had the M and S light on. I fitted the relay and sorted it. I only ask as it looks like the wires are not fitted to the right terminals. They should be on the solenoid connections. If they are, maybe it could be an open circuit on the wires going to the relay. Look back at my crude wiring diagram in this thread. Hope this helps, i know what it is like having a head scratcher like this one.

Regards

Iwan
 
The_Mystery980 said:
Hey Tom, love the forum and love the setup for lockup. I did it as well and it worked which was amazing but I always had the M and S lights on first start and I'd have to clear the code but now the code isn't clearing and the M and S light is always flashing and my lockup isn't working even tho everything is wired up how you've shown. I've got the 30amp relay so I'm just not sure? Can you please give me some advice if you have any.

Thanks
Logan
Click to expand...
Hi Logan
As people have said before me I would double check every connection. You shouldn't get any error codes if connections are correct.
As also previously said make sure you have the correct terminals on the relay.
If all is correct and you still have issues then there is a fault elsewhere. Check all other connections.
Tom
 
DrecklyD2 said:
Hi Logan
As people have said before me I would double check every connection. You shouldn't get any error codes if connections are correct.
As also previously said make sure you have the correct terminals on the relay.
If all is correct and you still have issues then there is a fault elsewhere. Check all other connections.
Tom
Click to expand...
Just for information, The other thing you need to watch for is modern relays sometimes have a diode these can throw an error in the TCU. The old school relays work better.
 
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