Re: GM CTS sensors & MAT sensors

[Peter Gargano <peter@techedge.com.au>]

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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