Re: GM CTS sensors & MAT sensors

[Shannen Durphey <shannen@grolen.com>]

I copied these tables because they actually showed slightly different
values.  In almost all cases that I can remember, the charts for CTS
and IAC have been identical.
Shannen

Peter Gargano wrote:
> 
> Shannen Durphey wrote:
> >
> > Sent it to ya.
> 
> Thanks, Shannen. And for everyone else's benefit too, I have
>  reproduced below the information contained in those GIFs
> (best viewed with a fixed width font)...
> 
> One would almost be tempted to suggest that, within the
> accuracy of manufacturing tolerance, the IAT and ECT sensors
> have the same resistance vs temperature. Note also that the
> two tables (that obviously come from a GM document) have
> differing conversions between C and F - 70C is exactly 158F
> rather than the 160F suggested in the first table!
> 
> So, next question, how many other temperature sensor curves
> are there that GM uses?
> 
> regards, Peter
> ====================================
> 
> AIR - IAT/MAT resistance
> 
>  C       F        ohms
> -----------------------
> 100     210         185
>  70     160         450
>  38     100       1,800
>  20      70       3,400
>   4      40       7,500
>  -7      20      13,500
> -18       0      25,000
> -40     -40     100,700
> 
> COOLANT - ECT/CTS resistance
> 
>  C       F        ohms
> -----------------------
> 100     210         177
>  90     194         241
>  80     176         332
>  70     158         467
>  60     140         667
>  50     122         973
>  45     113       1,188
>  40     104       1,459
>  35      95       1,802
>  30      86       2,238
>  25      77       2,796
>  20      68       3,520
>  15      59       4,450
>  10      50       5,670
>   5      41       7,280
>   0      32       9,420
>  -5      23      12,300
> -10      14      16,180
> -15       5      21,450
> -20      -4      28,680
> -30     -22      52,700
> -40     -40     100,700
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