4 hours ago
Hi,
I really need help and some advice from someone with better experience in car electrical problems.
In my V90 cc from 2017 i have problem with driver seat heating that is not working. Passenger side seat works perfectly.
Heating pads are 100% good.
However, after doing some research myself, I found that the pin that supplies the 15V power to the heating mat on the driver's seat connector is giving 0V (on the passenger side, this pin is a constant 15V). Tests showed that this wire goes directly from the fuse box. And here's the interesting thing: the heater fuse is working, normally 15V flowing through it, but the pin coming out of the CJB box shows 0V, which means that the seat wire itself isn't the problem either. ? And a twist – I replaced the entire CJB module to check it, but the problem persists.
Reading the error code via OBD gives this result: CCM-B103087 Left front seat heater. Bus signal/message error. No message.
One service center told me the problem was the wiring from the seat to the CCM module and that it needed to be checked. So I bought another used CCM module and replaced it, but to no avail—the same error persists. I'm still wondering how to approach this issue.
Does anyone have any ideas on what else to check? Perhaps my understanding of the CJB box is flawed, so I'd appreciate any guidance.
I really need help and some advice from someone with better experience in car electrical problems.
In my V90 cc from 2017 i have problem with driver seat heating that is not working. Passenger side seat works perfectly.
Heating pads are 100% good.
However, after doing some research myself, I found that the pin that supplies the 15V power to the heating mat on the driver's seat connector is giving 0V (on the passenger side, this pin is a constant 15V). Tests showed that this wire goes directly from the fuse box. And here's the interesting thing: the heater fuse is working, normally 15V flowing through it, but the pin coming out of the CJB box shows 0V, which means that the seat wire itself isn't the problem either. ? And a twist – I replaced the entire CJB module to check it, but the problem persists.
Reading the error code via OBD gives this result: CCM-B103087 Left front seat heater. Bus signal/message error. No message.
One service center told me the problem was the wiring from the seat to the CCM module and that it needed to be checked. So I bought another used CCM module and replaced it, but to no avail—the same error persists. I'm still wondering how to approach this issue.
Does anyone have any ideas on what else to check? Perhaps my understanding of the CJB box is flawed, so I'd appreciate any guidance.
