(03-07-2024, 08:04 AM)IMAY2023 Wrote: Here is an update!  I did it Folks!
I retrofitted 2018 S90 Inscription Front and Back Seats to my 2019 S60 T5.  The seats I got are Heated, Ventilated both front and back. In addition, front seats have side support and massage.  (passenger & driver) 
My original front seats has only heated option and back seats are just regular.   
Font Seats:
The seats fits directly, no need to modify anything. 
Wiring though depends on the original seats.  
Factory heated > Heated +  Ventilated  : No need to wire anything. 
Factory not heated > Heated or ( Heated + Ventilated) : Two individual wiring is needed.  (positive and LIN to CCM ) per seat. 
Factory not heated >   Heated +  Ventilated  + Side support + Massage  Three wires is needed.   (positive and LIN to CCM ) per seat and 1 positive (shared fuse) for both seats. 
Since my seats were already heated, I had to get 1 positive line from fuse box for both seats. 

Then just change the config via Orbit. 
Note: Massage seats may not work at first right after config change. Just reset all the ECUs after config is done then close and lock the car. Come back later it should work. 
 IMPORTANT: Just make sure the seats you are getting do not have blown airbags or airbags removed.  Otherwise, you don't have an issue.   


Back Seats:

PAIN IN THE BUD but doable though if you are determined and stubborn like me  :-) !!! 
IMPORTANT: S90 rear seats are little bit wider on backrest sides. 

NOTE 1:  Ventilated rear seats do not have foldable headrests.  
NOTE 2:  If you do not have 4 zone climate control, rear ventilated seats will not work because it requires digital control panel with fan control and the control panel is connected to the IHU LIN. (same LIN as the ignition switch). IHU will not turn on the panel unless the car is set to 4 zone climate control. 
NOTE 3: If you do not have 4 ZONE from factory, DO NOT change it. HVAC will not work because it's missing temperature sensor. At first you may think it's working but after CCM resets completely, it will not blow any air from any vent regardless what you choose. 
NOTE 4: CCM is located on the AC unit behind the dashboard, it's impossible to wire the missing temp sensor without pulling apart the the whole dashboard. (I gave up) 

If you already have 4 zone but without heated and ventilated,  you just need to replace the control panel or you can leave it as is and control the rear seat heat and vent from the IHU. (rear climate controls)! But you'll have some wiring to do.  

If you do not have 4 zones but have heated seats already, replace and plug & play but rear ventilation will not work because there is no button to start them. 
If you do not have 4 zones and do not have heated rear seats like me.  You will need to wire the heated seat and again work around the VOLVO's cheapness for saving 2 wires from the central control harness to main harness. 

Now the wiring, it not complicated but requires works. 
By the way, I am not affiliating anything, just sharing the info after long time of search so it will be easier for the folks crazy enough like me to attempt this :-)   
You will need...
2 x https://www.amazon.com/dp/B089KTJJHF?psc=1&ref=ppx_yo2ov_dt_b_product_details   > This is for the heater module connected to the seat. 1 for each side. 
2x https://www.amazon.com/dp/B08547CNDY?psc=1&ref=ppx_yo2ov_dt_b_product_details   > This is for the backrest connector. 
https://www.amazon.com/dp/B08QJHXRN6?psc=1&ref=ppx_yo2ov_dt_b_product_details  > Fuse tabs 
The connectors have their own wires no need to rewire, they can be just joined with the supplied joiners. 
For Positive heated seats, use 16 awg wire > Goes to the cushion connector. "Yellow"   pin 1 
For LIN connection I used 18 but you can use small as 22.  >  Goes to the cushion connector. "Green"   pin 2 to the front seat heating module.  RL to FL and RR to RF. 
For Ground Use 18. >  pin 3 on the  cushion connector and pin 5 on the backrest connector.  Each pin must be grounded individually. you can use the same ground point. 
PIN 4 on the cushion connector goes to PIN 1 on the backrest. 
PIN 5 (ventilated)  on the cushion connector goes to PIN 2 on the backrest. (replaces the headrest release switch pin)  If you do not have the ventilated seats, you do not need that.  
PIN 3 on the backrest connector is for the lights of the center arm rest . I get it from the light under the glow box.  

For the folks who do not have the heated rear seats and do not have 4 zone climate like me. 
There is a green connector inside back of the center console. Just pull the plastic cover and you'll see it there. 
You need to buy 31346786 and connect it to the green connector. You can buy the trim peace too or just make whole for the buttons on the existing trim (that you pulled out ). Not done yet. :-) Not so easy ! 

The green connector is already grounded but we are missing the positive and the LIN. This is where VOLVO got very cheap. 
For positive, just get it from the 12v socket under it. Easy enough. 

For the LIN. 
Pull out the cover of the center console at the passenger side. You will see grey connector. 
Look for the white and light green wire. PIN 23  and PIN 11. Just put a jumper wire from pin 23 to 11. 



Well done ! you have a heated rear seats !

(04-28-2025, 12:26 PM)Helpful Wrote: Good afternoon. My car is a 2023 XC60 Core. Simple but fully electric seats with heating and memory on the driver's seat. (without a leg extension). I want to install seats with all the options. I found a set of seats from a car from England (right-hand drive). Can I install them in my car? What to do with the passenger presence sensor that will be on the driver's side? Is it possible to move this sensor? The control units on both "new" seats from England are the same 31652047.

My car is also from the USA. Do I understand correctly that I will still need to rearrange the airbags from my native seats to the donor seats?

(05-02-2025, 07:26 PM)ana100 Wrote:

(04-28-2025, 12:26 PM)Helpful Wrote: Good afternoon. My car is a 2023 XC60 Core. Simple but fully electric seats with heating and memory on the driver's seat. (without a leg extension). I want to install seats with all the options. I found a set of seats from a car from England (right-hand drive). Can I install them in my car? What to do with the passenger presence sensor that will be on the driver's side? Is it possible to move this sensor? The control units on both "new" seats from England are the same 31652047.

My car is also from the USA. Do I understand correctly that I will still need to rearrange the airbags from my native seats to the donor seats?

Yes, it can be done. If You just read carefully this thread, I think all the needed information is here :-)  As You have heating and memory on Your old seats, wiring should be there pretty much ready. I guess You are missing only powering the seat comfort module, that's pin 15 on the big connector. 

I did successfully install right-hand drive seats to left-hand drive car.  You can move the passenger occupancy sensor, not hard at all, but You need to wire it to pin 11 on that big connector under the seat, take the pin from the other seat. The passenger seat controller identifies itself with the pin 21 grounded at the seat control module, so You need add extra wire to Your new passenger seat. Take the pin from the connector of new driver's seat.  

It's good to get Yourself little bit familiar with the wiring diagrams, these are pages called 10_Driver_Seat_LHD and 10_Passenger_Seat_LHD. Pages 159 and 164, in my copy of the wiring diagram. You can check what pins and wires need to be there. 

Good luck!

(05-14-2025, 06:40 PM)IMAY2023 Wrote: The 94/505 (US Market Driver Seat harness connector). 
The 94/506 (US Market Passenger Seat harness connector). 
94/506:31  PIN is the 4/240 OCCUPANT WEIGHT SENSOR OWS  It's the LIN communication goes to 4/176.1 SUPPLEMENTARY RESTRAINT SYSTEM SRS
94/505:31  PIN is the 4/169 POWER SEAT MODULE DRIVER PSMD. It's the LIN communication goes to 4/183 SEAT FOLD MODULE 3:rd ROW SFM3

94/505:11 PIN > Does not exist on US cars. 
94/506:11 PIN 7/255 SEAT BELT REMINDER MAT it's power goes to 4/176 SUPPLEMENTARY RESTRAINT SYSTEM SRS on PIN F6  (This might not exist on US market)

(05-04-2024, 11:47 AM)Pliind Wrote:

(05-04-2024, 11:42 AM)Oscarv90raggarn Wrote: Hey everyone. I tried to switch from semi electric seats to full electric seats in my s90. Sadly it wasnt plug and play. Ive tried reading through the forum 100 times but i cant seem to find anyone that had the same problem.

I looked att the old semi electric seats connector. Where i have the following pins, 16, 22, 23, 32.

The new seats have 11, 15, 16, 22, 23, 31, 32. So i am missing 3 pins. 

Has anyone done This? Where do i have to get the new pins from? Im guessing that there is some sort of CAN cabels needed. Where do i get This signal from if thats the case.

Any answers are apriciated since i really want This to work. Best regards, Oscar.

Can can (no pun inteded) be found in your front door harnesses. I think its easier with photos, jag skickar pm