SC430 - 2nd Gen (2001-2010)

Seat Heater: seat only or back also?

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Old 01-29-12, 02:56 PM
  #16  
JerryB
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Originally Posted by kjcole
Seat and backrest on my 2002. Seat and backrest on my wife's 09 Chevy. Seat and backrest on my old Audi. Seat and backrest on my buddy's Chevy Traverse (with independent control of seat and backrest). I can't say that I know of any car with seat heaters that only have elements in the seat cushion.
Hi kj,

You are one of a few people who I give credence to.

Have you determined it by feel or by viewing a schematic?

It would seem to me that a schematic would answer the question without leaving any further doubts.

And if I was wrong on my previous post, then I was wrong & I'm saying so now.

Jerry Baumchen PS) A friend has a '04 Camry with only seat/butt heaters.

Last edited by JerryB; 01-29-12 at 02:57 PM. Reason: add something
Old 01-29-12, 03:11 PM
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VVTiBob
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Hi Jerry,

Sorry by schematic...both seat cushion and seat backs have heating elements.
Attached Thumbnails Seat Heater: seat only or back also?-heated-seats-cushion-and-back.png  
Old 01-29-12, 03:58 PM
  #18  
tfischer
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Oh, yeah - sure - but just wait 'till you see the schematics of my back.
(Maybe I should have taken off my sweater during the test.)
Old 01-29-12, 04:53 PM
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sixonemale
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Originally Posted by grottoman
Hello all-
It seems to me that only the actual 'seat' (under the butt) of my seats gets warm with the heater.
Is the back of the seat also supposed to be heated?

If so, is it possible there's a separate fuse, or is it more likely that there's a disconnect?

I searched the forums but didn't see this thread, my apologies if I missed it.

Thanks
I concur with VVTiBob that both the seat and back rest having heating elements in them. I've attached a schematic of an '06 SC seat heater system that is probably identical in all models, '02 - '10, which also shows where fuses are located.

Hope this helps!
Attached Files
File Type: pdf
Seat Heater.pdf (68.7 KB, 352 views)

Last edited by sixonemale; 01-29-12 at 04:57 PM.
Old 01-30-12, 03:41 AM
  #20  
donnieS
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My 03 has heat in the seat and back, too.

ds
Old 01-30-12, 07:24 AM
  #21  
kjcole
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Although the schematics confirm it, on cold Iowan mornings with just a sweatshirt on it's easy to tell that the backrest quickly changes from cold, stiff leather to warm leather.

Since several individuals noted here that only the seat bottom on their cars were warming, I'm wondering if, with use, the seat back elements are prone to problems. I wouldn't suspect element breakage from pressure (the seat bottom would go first -- the elements on on old Audi were prone to mechanical stress), but perhaps there's a connector to the sub-assembly that should be inspected as pointed out in the schematic? Or wires that get pinched or overworked from seat adjustments? Just guessin

Last edited by kjcole; 01-30-12 at 07:25 AM. Reason: grammar
Old 01-30-12, 08:09 AM
  #22  
grottoman
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Excellent feedback everybody, thank you.
Given how hot the seat gets, I can't imagine that I'm unable to 'feel' the back get warm.

I'm going to see if my local folks can see an issue, and I'll let you all know what I find out.

Thanks!
Old 01-30-12, 09:30 AM
  #23  
TxPhantom
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my neck gets hot because my headrest has a heater too...

Old 01-30-12, 11:11 AM
  #24  
JerryB
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Originally Posted by VVTiBob
Hi Jerry,

Sorry by schematic...both seat cushion and seat backs have heating elements.
Hi Bob,

Thanks for that.

And I am happily wrong.

Jerry Baumchen
Old 01-31-12, 05:06 PM
  #25  
OBP
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Originally Posted by kjcole
Although the schematics confirm it, on cold Iowan mornings with just a sweatshirt on it's easy to tell that the backrest quickly changes from cold, stiff leather to warm leather.

Since several individuals noted here that only the seat bottom on their cars were warming, I'm wondering if, with use, the seat back elements are prone to problems. I wouldn't suspect element breakage from pressure (the seat bottom would go first -- the elements on on old Audi were prone to mechanical stress), but perhaps there's a connector to the sub-assembly that should be inspected as pointed out in the schematic? Or wires that get pinched or overworked from seat adjustments? Just guessin
For my seat heater fix at the dealer, they changed the seat first and that did not fix it. Then they changed the switch assy and that still did not fix it. Finally they changed the whole seat back and that was what fixed it. Which means in my case, it was the seat back element or some circuit in there which failed.
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