I think the missing connector is the least of your worries. You will also need software that doesn't exist for your model.

If there are different levels of heat the element is most likely controlled with pulse width modulation.

 

I installed on my 2009 xc70 a complete heated steering wheel + paddleshift package from 2014+ xc60(package including a new SWM module, clock spring, wiper/turn indicators levers and HSWM). the heating element is controlled by a module that is most likely CAN connected and is similar to those controlling the heated seats(so I suppose the hswm is also CAN connected). the heating element in the steering wheel has a wiring that is not routed in the green connector behind the SWM but has a separate 2 wires connector that is easy to recognize so it is obvious where the electric power should arrive(would like to post a picture but I do not find a way to do it). the HSWM module has 6 pins and since it is enclosed in a fully isolating box(no ground on the box) 2 of those pins have to be 12v +/-, then 2 wires have to go to the steering wheel heating band so there are 2 more wires in the socket. I assume one is CAN line and the other is either CAN line or may be a +5v to inform control unit to give power to the heating element just like it happens with the electric power steering motor. if that's the case may be it could work with no CAN signal only giving power +/- and +5v to arm the internal relay just the same way it happens with the electric power steering motor. I once installed a pair of OEM heated seats directly powered by +12v, no control box at all and they have worked for years(may be with a huge power absorption) but would not like to do the same with the steering wheel: I would like it to be regulated. this morning I went to the Volvo dealer asking for an electrical diagram of the control box and they say they could provide it to me if I only had a VIN number(that I do not have obviously since I have a xc70 instead of xc60 2014->). I ordered the original socket and pins to wire the control unit but still miss to understand how to wire it. opening the unit did not give me any idea about how to do it since I am not an electronic wizard but if someone can figure out how to put the wires we could do a retrofit guide(missing CAN link it won't be possible to set the target temperature but it should work at the preset level)

 

good news. I have the HSWM electric diagram: it does not look so difficult to wire the module. it has 6 pins but pin 4 is unused. 1 and 6 are power supply(1is + and 6 is ground), 2 and 5 go to the 2 wires connector in the SWM and 3 that is the LIN wire goes to pin 9(that is empty) in the green connector behind SWM. pin number 3 on HSWM(that is LIN wire) goes
through SWM to a temperature sensor(I have no idea if the temperature sensor is already there or is to be added). that's all. now I would like to share the electric diagram with you but do not how to do it. I would like you to see the diagram and discuss with you about it. can you suggest me on how to post the image? on the page bottom it says I have no permission to post attachments

 

Could you possibly put the pictures on imgur/Google drive and post the link here? Btw have you managed to make it work?

 

hope this works, here the imgur link:

ok, as far as I understand we have a relay controlled by CEM sending +12 to HSWM pin 1. I think pin 6 is ground but it goes also to 31/83 that I do not know what kind of connection could be. on the other side of HSWM we have pin 2 and 5 going to connector called c6 pin 1 and 2. SWM has 2 connectors: the green 10 pins connector on the back and a white 2 pins connector right behind the spiral contact that goes to the heating element in the steering wheel. I assume this white connector should be C6. then we have pin 3 in the HSWM going to connector C1 pin number 9 in the SWM. the green connector in the SWM has 10 pins, after installing the pins to enable the paddleshift, the only empty pin is number9 so I assume position C1:9 should be pin 9 in the green connector. this C1/9 pin in the SWM is a LIN connection and goes to a temperature sensor. now I do not know if this temperature sensor is already in the car, if it's embedded in the steering wheel or I should install it in the C4 connector but I do not know where this C4 connector is. I am stuck here so far: can anyone help me please?

 

Any update on the progress? We are so close after all!

 

the heating element has a separate plug so it would not be difficult to deliver +12 to it with a pwm power supply controller but I wanted to plug it like it was OEM at the beginning. the wiring diagram shows that pin 1 and 6 in the hswm are +/-12v, pin 2 and 5 are 12v to the heating element and pin 5 is probably the LIN connection. I attempted to plug power supply to the hswm and connected a bulb to pin 2 and 5 but nothing happened. I assume hswm waits for a LIN signal to start powering the heating element and I do not know how to fake this signal. I need advice
I am going to change my mind and power the heating band with an external pwm controller. it needs to modify the button to be a circuit breaker with backlight and build a pwm controller. can we find a pwm power supply on the market or should we build one?

 

As far as I know, there's no temperature settings on the wheel anyway, it goes full blast. But regulates to not overheat.
Interesting to see if you succeed though, I think many are curious about the project, so good luck

 

If memory serves, the SPA cars I've driven had lo, med, hi. The regulated one-speed we had on V60CC was uncomfortably warm for me most of the time, though SWMBO loved it.

 

So,a few chilly mornings is enough to get me to have another look at this thread... seems to me that while temperature control and PWM might be nicer, surely just something you can turn on until it gets warm then turn off would get you 95% of the desired effect for a lot less effort and expense

 

there is this kit on e-bay. we could use this controller to power the oem steering wheel. it also features a temperature level regulation while the oem controller does not

Universal Car Steering Wheel Heater Pad Heated Carbon Fiber w/ LED Switch 6Level | eBay

Carbon fiber Heated Steering Wheel with signal wheel 6 shift switch. Wareharness with switch 1 Heating pad 2 pcs togerther 1.

www.ebay.com

 

I actually do not know if the heating band would last long if connected directly to +12 with a simple switch: I suspect it would overheat but many years ago I installed a pair of spare heated seats from my 850 in another car, directly connected to +12 and although the heat level was unconfortable nothing failed. I trust some knowledged guy here can suggest the right solution: since the heated band in the steering wheel has a separate 2 wires connector and it's so easy to connect it to a source of power, building the right power supply should not be so hard

 

I have ordered the heating band kit: as soon as it arrives(it could take quite long as it comes from the far east) I will try to connect the controller to my steering wheel. I expect it to be nothing else then a pwm with multiple frequencies: if it works we will be able to update P3 cars to the multilevels comfort of SPA platforms. I will keep you updated

 

I'm installing the heated steering wheel into my S60 from 2013. I use a Clockspring with heating from a 2014. with this Clockspring you have to repin the cable in the steering wheel but this is not a big job. I use the original button in the center consol. I opened the button and solderd some wire to the outside. The button trigger two Relays to fire up the led in the button and to start the PWM Modul.
I just waiting for the PWM modul

I will test it with this PWM Modul:

PWM DC Drehzahlregler 2000W 12V-50V 40A Motor Speed Controller Motorregler | eBay

Entdecken Sie PWM DC Drehzahlregler 2000W 12V-50V 40A Motor Speed Controller Motorregler in der großen Auswahl bei eBay. Kostenlose Lieferung für viele Artikel!

www.ebay.de

 

I'm installing the heated steering wheel into my S60 from 2013. I use a SAS from a 2014. with this SAS you have to repin the cable in the steering wheel but this is not a big job. I use the original button in the center consol. I opened the button and solderd some wire to the outside. The button trigger two Relays to fire up the led in the button and to start the PWM Modul.
I just waiting for the PWM modul

I will test it with this PWM Modul:

PWM DC Drehzahlregler 2000W 12V-50V 40A Motor Speed Controller Motorregler | eBay

Entdecken Sie PWM DC Drehzahlregler 2000W 12V-50V 40A Motor Speed Controller Motorregler in der großen Auswahl bei eBay. Kostenlose Lieferung für viele Artikel!

www.ebay.de

sounds great! another problem in this project is to build an illuminated button to install in the center console. can you post some pictures showing how you modified the original button in order to retain illumination and not give interference in the console functions? are you also able to light up the led in the center of the button when the heating is on?

 

I opened it like in the picture and cut all contacts. Only the last two not. 12+ and minus. With this setup the ilumination is controlled by the Car. (By my testings I blow up the little LED for ilumination, so I have to buy a new button ) yes I can light up the On/Off button, it’s controlled also by a relay that sends Minus to it when I press the button.

I will make some pictures when I buy a new button. But first I will install all to know if all is working.
Found this thread here to late

The Pictures are from a Russian site but mines look similar.

 

does this button in the picture come from the facelift cars with smaller buttons or from the old cars with big buttons? I own a 2009 xc70 and installed a heated/paddleshift steering wheel kit for a 2014 xc60: the button I found in the kit I bought from Volvo was for the newer facelift cars. being the button body different I had to transfer the part with steering wheel logo on an old button to have something I could install in my center console. the only problem is this button is a bit smaller then my others.

 

It's this button.
I don't think it's smaller, looks like the other buttons in this row. Only the illumination color is a little bit different.

Picture is from my car.

Schalter Lenkradheizung Mittelkonsole 31324862 (1075840)

Schalter Lenkradheizung Mittelkonsole Volvo S60 (2011-2018), S80 (2007-), V60 (2011-2018), V60 CC (-2018), V70 (2008-), XC60 (-2017), XC70 (2008-)

www.skandix.de

 

Today I install the new steering wheel with the Clockspring from modelyear 2014.
As I said you have to repin the wiring in the steering wheel. It’s super easy just swap all cables one to the right!
And unpin the Red cable und tape it back.(its for the oem ECU the temperature sensor)
I moved my SAS from the old Clockspring to the new one. Don’t know if this is necessary but I would like to keep my functionally one
tested with a little Battery and steering wheel getting warm, no errors in vida/VDASH.

PWM module should come tomorrow. Maybe I can install it maybe next week..
I will draw some wiring diagram for the two Relais and the PWM.

Edit: Wiring diagram

 

I moved my SAS from the old Clockspring to the new one. Don’t know if this is necessary but I would like to keep my functionally one

Hi . What did u do in this moment did u open (unscrew) bottom of clockspring and install from the old clocksping?
For me sas and clockspring means the same

I would like to know why u repin cables in connector?
Thank u for you post is very helpful great job

 

ok, you have the smaller new buttons. if someone(like me) wants to do this upgrade to a pre-facelift car has to assemble a custom button cutting the front portion of the new button(the part with the steering wheel logo and the led) and gluing it to the old button body. are you moving the wires in the connector because you have new clockspring but old SWM? I installed new SWM, new clockspring, and new levers(2014 xc60 stuff) on my 2009 xc70 and everything works without changing wires connections(I had to add 2 wires to enable the paddleshift). looking at the wiring diagram I see that the heated steering wheel module is connected to the so called C1 connector(I assume it's the green connector in your pictures) in position 9(the green connector has 10 pins if I remember correctly) for the temperature sensor and to position 1 and 2 of the so called C6 connector that I suppose to be the yellow connector under the SWM. if it is so simple it should be possible to connect the original heating module and the original buttons and have everything working like OEM. if you use the "do it yourself/poor man way and connect it using extra relay and custom button with external wiring, why do you need to connect the temperature sensor?

 

by the way, how do you post pictures here? I had to upload the wiring diagram on another website and share the link

 

I tried the facelift SWM, but it throw me a DSC Error and SAS error. so I use my old SWM/SAS and new Clockspring.
With this combination you have to repin the cables in the steering wheel cause of old Clockspring has 7 pins into SWM and new Clockspring has 8 pins. One pin now is unused.
I also tried the OEM Heating module with direct 12V without any button but it only give me 4V out and this is not enough to heat the wheel, don't know why, so I will go the DIY-way, as long it will work and look OEM its OK for me =)
I don't need the temperature sensor. I forgot to unpin before I took the Photos =) I unpinned it and taped it back to the other Cables.

I think C1 is the one behind SWM. On my pictures you see the plug in the Steering wheel that's C3 (in the S60 Diagram)

Under the Textfield is a paperclip button, with this you can direct upload Photos. To wich site?

 

I uploaded the wiring diagram on imgur but now the attachment works. I tried to connect the volvo heating module with your same result so I gave up and ordered a stand alone pwm power supply. pin number 9 on C1 connector is LIN connection, so I think the OEM module is waiting for a LIN signal to wake up. do you think it's possible to fake the LIN signal? is it possible to send a signal of some sort to the module to wake it up?

 

I also think it’s waiting for a LIN-Bus signal.
When you have the Know-how of Bus -Systems then sure you can fake this signal.. but I don’t

edit: PWM module is here🎉

 

PWM Module tested and is working..
Yellow Cable is the „Button“ for Low trigger signal. Black roll is a motor just to test
Ready to install

 

Following with interest... only issue with this project is if I order the parts from China now they will get here just in time for spring

 

I bought all non volvo parts from Amazon.
when I have all installed I will make a list with all parts what you have to buy to get it working.

 

Little Update:
Installed wiring from steering wheel to PWM and 12+ from cigarette lighter and 12- from a Screw exactly under the warerfall-console.
Now I can make it on and off with ignition on/off. Today I have no time for installing the two relais to for the Button in the waterfall-console. Maybe I find some time this week to install the rest.. I marked a point on the PWM housing where it’s by 10V output, that’s a nice temperature for a while and don’t to hot.
That’s not the final place for the PWM!

I’m so Happy now to have warm hands in the morning!!! Had a BMW 1 Series before and my wife has a BMW X4 and both have heated steering wheel. I missed it soooooo!!!!

 

finally someone did it! is there a way to move the pwm regulator from the pwm box to somewhere on the console so you can have adjustable heating?

 

Sure, you can desolder the regulator and extend it with some wiring an can it place where ever you want! But I think I will try a little bit with temperature and let it then on one temperature. When it gets to warm I just make it off.
I think I will place the PWM behind the light switch, there is much room to place it.

Gesendet von iPhone mit Tapatalk

 

Little Update:
Wired all Cables behind the Lightswitch.
Put the relays on the Topcase of the PWM module and wired them.
Next step is just putting +/- and trigger signal and the two wires from steering wheel on the PWM module.
Maybe tomorrow, maybe the next days..

 

Hi, i have to say that i can't thank you enough for making it possible for the retrofit to work, i ordered everything and installed it, but the only problem i have is that i don't know how to wire in the cables to the button/trigger, do you have any pictures of the wiring and how you fit everything to the button/trigger?

I went to my local autoshop and bought a universal switch for temporary use until i can solve the wire management to the button/trigger, Thanks again for solving the main problem, helped out a lot and everything works!