TC equipped, what's this thing on the booster?

[CallMeSyd]

So a guy I'm trying to help has a 3rd gen with traction control and he just changed the brake booster, but he is having problems with his cruise not working and a bunch of abs codes. I was thinking originally it was the pressure sensor on the master cylinder, but I think the pressure sensor was moved to the underside of the master cylinder on the traction control equipped models, unless the sensor looking thing on the bottom is a solenoid or something for the traction control. Either way, there's this thing on the front of the brake booster on the TC equipped ones that I assume is a vacuum pressure sensor? Can anyone confirm this? The one on his was wiggling around and had vacuum suck past the o ring on the back of it, causing a lean condition and weak booster/squishy brake pedal. Also, looking at it, it almost looks like maybe it would press in, turn, and lock similar to changing a headlight bulb or turn signal. Can anyone confirm? Also, anyone know the actual name of this thing and where to find a replacement?

 

[Fix4Dirt]

bump

 

[CallMeSyd]

bump

Thank you. I really want to know what this thing is, what it does, and where to find one. There's no literature I can find on this and I feel bad for this guy.

 

[drdoom]

What year is that piece? And what color are the wires going to the connector?

 

[drdoom]

That's looking like the BRAKE BOOSTER SOLENOID used in electrical actuation of the brake system falling in the command hierarchy of the stability assist module.

 

[drdoom]

But also looking at your codes, you may be wanting to look at the BRAKE PEDAL FORCE SWITCH...integral to the BRAKE BOOSTER, as is the solenoid. No parts listed.

 

[drdoom]

Depending I suppose on the capabilities of your scantool, I think you should do the pin tests at the PEDAL FORCE switch first.

 

[CallMeSyd]

What year is that piece? And what color are the wires going to the connector?

05 and unfortunately it's not my truck so I don't have access to look at it or do anything. I will do some research on what you said though. It's an advance trac model.