Temp. Sender-what does it do?

Benesesso · 05-09-2006, 10:49 PM

After completing my recent BHG on my 1990 Turbo, the computer set a code for bad temp. sender--found it to be the one behind the PS reservoir bracket-the 2 prong thermistor. Checker and AZ don't have them, so it was $59 for a new one at the Toy. dealer.

BUT, I also found another temp. sender w/1 blade connector that is in the radiator side of the t'stat housing. There are 2 on this side, the lower one runs the elect. AC fans, and this one up higher. It tested open (infinite ohms to ground). The dealer had one, so I tested it right at the parts counter--same thing, infinite ohms. No sale. Then I tested the orig. one hot-no change.

What is the purpose of this sensor/sender? It doesn't run the temp. gage. It also doesn't set any codes.

ddmcse · 05-10-2006, 12:34 AM

you need a TSRM
you can dig one up from ebay. you need a real toyota manual too not a knock off

page FI-94 to FI-95
in my manual
i don't find it fast on the online one .
http://www.cygnusx1.net/supra/librar...fi/FI_084.html

one is a cold start switch for the cold start injector

one is temp

Benesesso · 05-10-2006, 03:06 AM

I have 2 genuine Toyota service manuals. Thw sender in question is not the cold start goodie--that one is on top and on the engine side of the t-stat.

The unknown sender is ~halfway down the side on the radiator side. I couldn't find it in the manual.

05-09-2006, 10:49 PM	#1
Benesesso 3" Exhaust Join Date: Nov 2005 Location: Phoenix, AZ Posts: 145	Temp. Sender-what does it do? After completing my recent BHG on my 1990 Turbo, the computer set a code for bad temp. sender--found it to be the one behind the PS reservoir bracket-the 2 prong thermistor. Checker and AZ don't have them, so it was $59 for a new one at the Toy. dealer. BUT, I also found another temp. sender w/1 blade connector that is in the radiator side of the t'stat housing. There are 2 on this side, the lower one runs the elect. AC fans, and this one up higher. It tested open (infinite ohms to ground). The dealer had one, so I tested it right at the parts counter--same thing, infinite ohms. No sale. Then I tested the orig. one hot-no change. What is the purpose of this sensor/sender? It doesn't run the temp. gage. It also doesn't set any codes. __________________ "You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein 1988 and 1990 Turbo Supras

05-10-2006, 12:34 AM	#2
ddmcse 500whp yet? Join Date: Jun 2005 Location: CT U.S.A. Posts: 966	you need a TSRM you can dig one up from ebay. you need a real toyota manual too not a knock off page FI-94 to FI-95 in my manual i don't find it fast on the online one . http://www.cygnusx1.net/supra/librar...fi/FI_084.html one is a cold start switch for the cold start injector one is temp __________________ 300+ RW HP Dyno run, jdm,mod turbo,3"exh,electfan,greddyboost Blown HeadGasket info My Supra KiXGaS

05-10-2006, 03:06 AM	#3
Benesesso 3" Exhaust Join Date: Nov 2005 Location: Phoenix, AZ Posts: 145	I have 2 genuine Toyota service manuals. Thw sender in question is not the cold start goodie--that one is on top and on the engine side of the t-stat. The unknown sender is ~halfway down the side on the radiator side. I couldn't find it in the manual. __________________ "You see, wire telegraph is like a very long cat. You pull his tail in New York and his head is meowing in Los Angeles. Do you understand this? Radio operates the same way: You send signals here, they receive them there. The only difference is there is no cat." A. Einstein 1988 and 1990 Turbo Supras

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