The fact that the light turns on and then off, shows that the control module is shutting it off because it is either seeing an issue to turn it off or the control module is the issue.
The problem with this is there is not only a control module for both sides but for the lower and upper seat cushion. Also there is an ultimate control module called the dual climate controlled seat module.
What needs to happen at this point is to check for codes and see if there is an issue that could cause the system to shut off. If not, then we need to use a scan tool to monitor the DCSM to see what the seat status is when this is happening. If the module is commanding them on but they are shutting off then clearly the module is the issue. Since both the seat and back cushion shut off, I suspect the DCSM is the cause but let's start here and from there. Thanks
Images (Click to enlarge)
Tuesday, May 5th, 2020 AT 2:57 PM