03-07-2024, 08:04 AM
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...ct_details > This is for the heater module connected to the seat. 1 for each side.
2x https://www.amazon.com/dp/B08547CNDY?psc...ct_details > This is for the backrest connector.
https://www.amazon.com/dp/B08QJHXRN6?psc...ct_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 !
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...ct_details > This is for the heater module connected to the seat. 1 for each side.
2x https://www.amazon.com/dp/B08547CNDY?psc...ct_details > This is for the backrest connector.
https://www.amazon.com/dp/B08QJHXRN6?psc...ct_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 !