PCS malfunction and BSM not working

Stock height truck. Pro grill after market garnish. Have a washer in top screw of tss sensor. Truck was fine for a year now the alert keeps going off.

getting pcs error coming on for a second then going off. The blind spot monitors also seem to be not working.

has anyone had this issue before?

 

Several things come to mind regarding the BCM, I will not address the PCS.
1)Have you checked the under-dash fuses yet? There are about 5 different fuses that the fuse list says power some portion of the BCM. 7.5A and 10A dfuses. Sorry I have not figured out yet how to attach files.
2)How does the BSM not work? i.e. what are the indications? Do the mirror lights come on for about two seconds when the button is pressed, or the ignition turned on? Do both sides not work, etc.

 

1 checked fuses all seem good but,
do u know which ones I should double check by their label?
2 when I start the truck no the bsm in the mirrors don’t light up.

I’ll post a video of the PCS malfunction error that I’m getting when I get home.

 

With the engine on, what happens when you cycle the BSM switch?

My downloaded schematics are, I believe from 2016, but the fuses are:
ECU-IG NO. 2
IG 1 NO. 2
BK UP LP NO. 3
ECU-ACC

The schematics also have more fuses:
METER
TOWING in engine compartment
EUC-B NO. 3 in engine compartment
These last three I believe you would be having even more problems if they were blown.

The BSM system is one of the simplest systems on the truck. The only electronic modules involved are the two BSM modules in the bumper caps, wiring, fuses and of course the Combination Meter and the CAN bus.

From my readings on this forum people have had problems with water and dirt at the BSM bumper modules and wiring problems. Also, alignment problems within the bumper.

I am ignoring the PCS system as I know little to nothing about it, ...yet.

 

Turned on truck and cycled through the bsm switch no indicators coming on and nothing changes on dash. Checked all the fuses they seem good.

I just unplugged the battery to let it sit for a little unplugged see if that will reset anything.

This alert flashes on then goes away after a second. Really annoying lol.

 

I don't know the years affected, but did you have the Grill Radar sensor recalled? There were posts of water intrusion to the unit.

What activities has the truck been through lately? Mud, snow, rain, etc..

2016 BSM Schematics

 

It’s a 2021 had the truck about 14months.

Not much besides driving on highways and surface streets.

it was around heavy snow when I first got the truck but that was over a year ago.

 

Did you end up figuring it out? I have the same problem