Monday, August 26, 2013 - 08:10 am, by: John Stafford(Johng12)
Can someone tell me about how the coolant temp senors work? Is one for the gauge and one for the ECU? If so then which is which? Anyone had to change these? The one on the bottom of the radiator seems to not want to let its plug go? Any hints?
The one near the thermostat seems like a big job to get to and do, any hints? I want to test them but think that means taking them out?
Thursday, August 29, 2013 - 11:26 am, by: Kush Chaudhary(1uz_hilux)
Part number is 89422-20010 and is around $78 from Toyota. I recently replaced mine to try and fix my idling issue but it didn't help. First pic shows where it is hiding. The bottom pic is what it looks like and that's comparing my old one to the new one. Very simple to change over
John Stafford DieHard Qld. Soarer UZZ31 GT-L V8 and a UZZ32 # 514
Sunday, September 01, 2013 - 10:37 pm, by: Kush Chaudhary(1uz_hilux)
The one I pictured above, is for the ECU. This sensor helps tell the ECU what RPM to idle at. The 2nd sensor is for the gauge in your dash I'm pretty sure
John Stafford DieHard Qld. Soarer UZZ31 GT-L V8 and a UZZ32 # 514
Monday, September 02, 2013 - 12:19 am, by: Robert Day(Lexsmaz)
The ECU sensor you have pictures is to tell the ECU the engine temp & adjust the fuel trim depending on the engine coolant temp, pretty sure it wont control engine RPM as the IAC does that job, but in saying that it might have a link up via the ECU when the engine is warming up for the increased idle RPM only & yes the single pin sensor with the white plug is just for dash temp gauge ..
The sensor at the bottom of the radiator is probably for the cooling fans assuming your has an electric cooling fan or fans
Monday, September 16, 2013 - 05:28 pm, by: John Stafford(Johng12)
Easy to get to with wire covers off (right hand and centre). Take R/H coil off and move the lower section of the centre wire holder to the side, use a deep 19 mil socket to get the old one out and the new one in, and it is done in an hour.
I will see what difference it makes?
John Stafford DieHard Qld. Soarer UZZ31 GT-L V8 and a UZZ32 # 514
Monday, September 16, 2013 - 05:36 pm, by: John Stafford(Johng12)
Take off the R/H side spark plug wire covers and the centre cover and then remove the coil and undo the base of the cover, which can then be moved aside to reveal the green plugged coolant tempt sensor (CTS), which can be removed with a 19 mil deep socket. It takes about an hour.
I will see what difference it makes to economy. It did not look like it had ever been changed and so I would say was non functional, I did not test it.
John Stafford DieHard Qld. Soarer UZZ31 GT-L V8 and a UZZ32 # 514
Saturday, October 19, 2013 - 10:14 pm, by: John Stafford(Johng12)
Made no difference to my economy. What is the sensor below it, that seems to go into the same water manifold at the back of the thermostat housing, with a brown, rather than green top?
Previous
