Blob said:

Appreciated as always, but as good as this is, it doesn't tell me which way round the wires go in the steering wheel connector. That's where I'm stuck right now.

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no probs, if u look at the C numbers at the end will be a number, that’s the PIN number where it goes into the connector

plse let me know if u need any more wiring diagrams to help

wiring diagram below of the D4 also shows the PIN numbers

Also the colour chart for u

I get what you are saying but all of the wires in the diagram that I need to know about are depicted and listed as being Red. So I still don't know which is which when I want to swap the connector. On the old ECU I have Yellow. Green and Blue which are clear on the diagrams but the new loom has Yellow/Green, Brown and White but the diagram says they are all red. If I knew which of these three was aligned to the the old ECU I can easily swap the connectors over.

Does that make sense?

No probs and see what ur mean, see if this helps as then at least ur have access to it where it shows many LR models and wiring manuals

https://onedrive.live.com/?authkey=!AMrvOm7c4l3jJkg&id=4BC2D89C85C7C171!550&cid=4BC2D89C85C7C171

Does take a little while to load and ignore the Microsoft , just press ok and should take u to many folders , plse let me know if that helps

I think you are struggling in vain cos if you watch all the diagrams you can see that the heater unit has no kind of digital signal whatsoever, it has power, ground and switch inputs and no interface with any programmable unit, i'm affraid that something was wrong with the first heated wheel you fitted or you missed something obvious without blaming yourself cos it can happen to overlook simple things, when CAN signals are involved it's clearely shown on the diagram like in the example below

sierrafery said:

I think you are struggling in vain cos if you watch all the diagrams you can see that the heater unit has no kind of digital signal whatsoever, it has power, ground and switch inputs and no interface with any programmable unit, i'm affraid that something was wrong with the first heated wheel you fitted or you missed something obvious without blaming yourself cos it can happen to overlook simple things, when CAN signals are involved it's clearely shown on the diagram like in the example below

View attachment 281867

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Not really mate, it's a simple case that I have 3 wires that I need to connect to a different connector and don't know which one goes to which as the diagram shows all three as being red but they aren't. Nothing to do with CAN on this bit.

Blob said:

Not really mate, it's a simple case that I have 3 wires that I need to connect to a different connector and don't know which one goes to which as the diagram shows all three as being red but they aren't. Nothing to do with CAN on this bit.

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My reply was after many posts of your's seing how much you struggle to overcomplicate things by changing heater units and looms and i thought everything started when you said that

Blob said:

The later one appears to have CANBUS connections over to the LH switch pack. I now theorise that this is expecting an input from the CANBUS which as GTStuart has suggested is at a different speed to our car, it will never receive or be able to interpret such a signal and therefore is unlikely to actually turn on the heater function.

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So do you say that on the vehicle the original wires are not all red as in the diagram or you are trying to match the RR wires to the D4 diagram? If the original wires are not like in the diagram tell me what year is your D4 and i'll check the exact diagram for it

sierrafery said:

My reply was after many posts of your's seing how much you struggle to overcomplicate things by changing heater units and looms and i thought everything started when you said that

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Struggle to overcomplicate things??? What? I can't even begin to follow the concept of wanting to overcomplicate something and then failing to make it harder for myself!

I thought this was to be an easy retrofit. It probably still is but I have a heated wheel ECU that is too new for my car. I also have one from my L322 which is of the type I am told is correct for my car but it has the L322 connector on it that doesn't fit the D4 wheel. I can use the connector from the Dr4 later ECU, but and here it comes again. I don't know which pin does what on that connector. The wiring diagram shows all three to be red but they are not red, red does not figure in either connector. I have Blue, yellow and green from the L322 and the connector has Yellow/Brown Brown and White as per the picture in post #36 all I need to know is which pin goes to which colour and I really can't see another way to ask the question. Obviously if I could find a pre 2014 D4 heated wheel ECU I'd just buy it and the whole thing would be done. They seem the same as the L322 ones which would make sense however to nobody's surprise, the wires and connectors are different types and lengths to fit the D4 wheel.

The D4 is a 2013.

Ah screw it! I'm just going to shove some power down the wire and see which one lights the LED and then I'll be 1/3 of the way there!

At this point i have a strong feeling that you was tricked and the switch in post 36 was not removed from a D4 then

Finally, a good news update here:
After a lot of searching and testing etc, it transpires that I did in fact buy a heated wheel for a 2014> Discovery which as was suggested requires a CAN signal and runs on a faster CANBUS than the earlier models.
The earlier D4 actually uses the same heater ECU as the L322 BUT the wiring is different lengths and you can't easily chop the wiring about based on the wiring diagram in this thread as it shows 4x red wires that don't exist! Also, the switch packs can be different between the two iterations making it very hard to cobble something together..

In sheer frustration, I broadened my search for parts as these heated wheels are rare to say the least. It appears that most US versions of the Range Rover Sport were fitted with heated steering wheels which meant that I was able to buy a wheel from one of those and had it shipped from Illinois (the irony of importing car parts from the US for a Land Rover is not lost on me!).

The RRS wheel of course did not have CommandShift paddles but it did have the ECU and switchbacks that I needed so upon arrival, I stripped it down, removed the heater ECU and back cover (which is different to the 2014 part as the ECU is a different shape) then I fitted that to the wheel I had bought, swapped the Piano Black switch covers and built up the wheel. 10 minutes later it was in her car and heating up beautifully.


Claire is absolutely thrilled with this as she has trouble with blood circulation to her fingers making them extremely painful when they are cold. As they say, happy spouse, happy house!

Now, I have a few bits left over!


Having fully cleaned the RRS wheel, it might actually be nicer than the D4 wheel I got originally but I'm not changing it all over again so I've built that as a 2014> D4 wheel and the original D4 wheel has been put together as a base wheel for those without command shift.

Does anybody want to make an offer on a heated wheel.... Please?

I'll list in the for sale section and stick it on eBay shortly I expect.





Thanks to everyone that chipped in to help out on this, we got there in the end!

Blob said:

Finally, a good news update here:
After a lot of searching and testing etc, it transpires that I did in fact buy a heated wheel for a 2014> Discovery which as was suggested requires a CAN signal and runs on a faster CANBUS than the earlier models.
The earlier D4 actually uses the same heater ECU as the L322 BUT the wiring is different lengths and you can't easily chop the wiring about based on the wiring diagram in this thread as it shows 4x red wires that don't exist! Also, the switch packs can be different between the two iterations making it very hard to cobble something together..

In sheer frustration, I broadened my search for parts as these heated wheels are rare to say the least. It appears that most US versions of the Range Rover Sport were fitted with heated steering wheels which meant that I was able to buy a wheel from one of those and had it shipped from Illinois (the irony of importing car parts from the US for a Land Rover is not lost on me!).

The RRS wheel of course did not have CommandShift paddles but it did have the ECU and switchbacks that I needed so upon arrival, I stripped it down, removed the heater ECU and back cover (which is different to the 2014 part as the ECU is a different shape) then I fitted that to the wheel I had bought, swapped the Piano Black switch covers and built up the wheel. 10 minutes later it was in her car and heating up beautifully.

Claire is absolutely thrilled with this as she has trouble with blood circulation to her fingers making them extremely painful when they are cold. As they say, happy spouse, happy house!

Now, I have a few bits left over!

Having fully cleaned the RRS wheel, it might actually be nicer than the D4 wheel I got originally but I'm not changing it all over again so I've built that as a 2014> D4 wheel and the original D4 wheel has been put together as a base wheel for those without command shift.

Does anybody want to make an offer on a heated wheel.... Please?

I'll list in the for sale section and stick it on eBay shortly I expect.

Thanks to everyone that chipped in to help out on this, we got there in the end!

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hiya

I’m over the moon after all ur hard work its resolved, I bet it was a massive sigh of relief when it started to work

so with it being a post 2014 I’m pretty sure that’s called a discovery 4.5 for when it had a face lift and can-bus speed was changed

I’ve got a D4 non heated wheel on mine but sadly the heated one won’t work otherwise I would have bought it from u

wonder if u go over to the D3/4 forum , , write a thread to Martin about posting it there, however I think I might have to pay for an advert to sell it, just thought it may be a lot less hassle then eBay tyre kickers so to speak

well you’ve made my day mate and bless u for updating us due to many threads not always finished with a solution , well chuffed it ultimately going to make life better for ur beloved , massive respect to u and thks again for the update

D4.5, every day's a school day!

Thanks for all your help Stuart. I still think I could make it work for the Pre 2014 cars as part of this, I bought an L322 heater ECU which could be cut about to so the job. The only thing I didn't make a note of was which wire goes where on the switch connector to be able to modify the L322 EUC into the Disco. Considering all the time and effort that you put in to assisting me, the very least I could do is whip the wheel off once more, note that and see if I can mod the L322 into this wheel as it would then have the option of going in either iteration. I'll try and get to that as if we're able to do it, it will make everyone's life easier later on and I have all the parts (aside from e D4.5 to test with).

Out of interest, did you buy the Facebook circuit boards to get the D4 wheel in your D3? I wonder if it's worth me doing that for the other wheel? Not to make money particularly but just to be able to offer someone a nice easy upgrade on their D3

Blob said:

D4.5, every day's a school day!

Thanks for all your help Stuart. I still think I could make it work for the Pre 2014 cars as part of this, I bought an L322 heater ECU which could be cut about to so the job. The only thing I didn't make a note of was which wire goes where on the switch connector to be able to modify the L322 EUC into the Disco. Considering all the time and effort that you put in to assisting me, the very least I could do is whip the wheel off once more, note that and see if I can mod the L322 into this wheel as it would then have the option of going in either iteration. I'll try and get to that as if we're able to do it, it will make everyone's life easier later on and I have all the parts (aside from e D4.5 to test with).

Out of interest, did you buy the Facebook circuit boards to get the D4 wheel in your D3? I wonder if it's worth me doing that for the other wheel? Not to make money particularly but just to be able to offer someone a nice easy upgrade on their D3

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ur so welcome mate

indeed that would be great if u ever get a spare moment plse to note the wires etc , also wondered that if it could be adapted with the right module , wiring etc

yes I got those extra circuit boards , think it was from black box I bought them from ,

plse let us know how u get on of u get some spare time as indeed would be awesome to see if it could be done, also I didn’t req any module on mine , so assume that module is only for the heated wheel option

few picture of mine, also found some of the extra loom I had to buy and those pcb , also fitted the D4 stalks replacing the worn out D3 ones as the writing has faded

another thing I done was fitted a D4 airbag as they were flat whereas the D3 had a raised bit on top, yeh I know I need to get out more , lol

thks again for all ur hard work

Hi @Blob

I can’t believe it, I looked through all my folders looking back to when I converted my steering wheel , can’t believe what I found , plse don’t throw anything at me , lol, look what it included with regards to the modules

really hope this added bit of information is useful to u

really sorry mate as feel terrible as the info of the different modules was there all along

https://blackbox-solutions.com/supp...heel-conversion-kit-installation-instructions

These were the boards I got

https://blackbox-solutions.com/shop/product/ac031

also see there’s a heated wheel conversion pcb that will plug directly into my existing conversion boards

https://blackbox-solutions.com/shop/product/ac032

HAHAHA, there's the info! Brilliant.

Looking at it, I would suggest that the L322 unit is only not compatible as the wiring is all different lengths and the connector is the female version but by happy coincidence, the male version is on the 2014 unit. I could easily lengthen and swap the connectors around to make that happen as finding Discovery heater ECUs is a heck of a search but L322 are two a penny.

I'll have a play about with the parts I have here still but if you're interested in having it for your D3, we'll discuss via PM.

Blob said:

HAHAHA, there's the info! Brilliant.

Looking at it, I would suggest that the L322 unit is only not compatible as the wiring is all different lengths and the connector is the female version but by happy coincidence, the male version is on the 2014 unit. I could easily lengthen and swap the connectors around to make that happen as finding Discovery heater ECUs is a heck of a search but L322 are two a penny.

I'll have a play about with the parts I have here still but if you're interested in having it for your D3, we'll discuss via PM.

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I thought u would like that mate regarding the ecus, must confess it was like Xmas and birthdays all at once when I saw that , plus indeed as u also say it makes so much more sense now we have more information and those pictures

yes plse as definitely interested with regards to the sport wheel for my D3 , indeed can chat via PM , it also won’t be much of an issue me ordering that extra heated wheel pcb from the above company which I assume would then need to be plugged into a D3 module

thks so much once again and also over the moon being able to share the above ,

indeed plse give me a shout when u have a free moment about the sport wheel, etc plse

many thks