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Username Post: Heated Seat issue - not the usual        (Topic#354192)
DenaliXL 
Contributor
Posts: 162

Reg: 02-25-07
12-03-18 08:36 AM - Post#2753171    

Heated seats trip after 10 minutes plus or minus. I replaced the DS lower element with OEM about 5-7 years ago. I checked resistance on all 4 elements (DS & PS, Upper & Lower) and the DS Upper was outside of spec (1.5-5.5 ohms) so I just changed it (it did have a small burnt patch). Seats still shut themselves off. Does NOT matter what heated seat switch or switches I have on.


I read about the issue with the pedal position sensor but seems like that issue and module issues usually trip within 30 seconds or at least under 1 minute. Memory seats & pedals seem to work fine.

Thoughts?



 
rockfangd 
"5th Year" Gold Supporting Member
Posts: 2548
rockfangd
Age: 32
Loc: Utica ny
Reg: 04-13-10
12-03-18 07:26 PM - Post#2753268    
    In response to DenaliXL

That is odd.
So if only one is turned on, any one, it still trips. What is tripping? fuse, breaker, or just bcm.


Old School GM fan FOREVER


 
DenaliXL 
Contributor
Posts: 162

Reg: 02-25-07
12-04-18 04:42 AM - Post#2753299    
    In response to rockfangd

By tripping I simply mean they shut off. Happens if any switch is on individually. After it or they shut off, you can turn it or them right back on and they’ll work for a while and shut off again.

I believe before I replaced the DS upper pad, they would stay on sometimes for a minute, other times 5-10 minutes. Now seems to always be in the 10 minute ballpark.

I thought about temperature sensor in the upper pad but it acts similarly no matter what side is on individually.

Happens even in the driveway with no one sitting so it’s not like a wire is moving around going down the road.



 
DenaliXL 
Contributor
Posts: 162

Reg: 02-25-07
12-05-18 07:51 AM - Post#2753459    
    In response to DenaliXL

Took a drive today. Put on DS on high both bottom and upper. Stayed on for 33 minutes, uncomfortably hot, then shut down. Put back on, stayed on 5 minutes then shut off. Put back on, stayed on 16 minutes then shut again.

Go figure.



 
rockfangd 
"5th Year" Gold Supporting Member
Posts: 2548
rockfangd
Age: 32
Loc: Utica ny
Reg: 04-13-10
12-05-18 06:54 PM - Post#2753542    
    In response to DenaliXL

weird. So inconsistent.
By chance are there relays under the seats?
Mine have relays that control them and sometimes they get worn and stick. Not good when that happens

Old School GM fan FOREVER


 
DenaliXL 
Contributor
Posts: 162

Reg: 02-25-07
12-06-18 05:46 AM - Post#2753597    
    In response to rockfangd

I do not think there are any relays, just the memory seat module that also controls heating.

It also seemed based on my butt thermometer that high, medium and low all pump out high heat (uncomfortably hot while not wearing a jacket). The back-only switch works to shut off the seat base as it should.

Definitely inconsistent.



 
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