DIY: 1998 V70 ECT (Engine Coolant Temp) Sensor Replacement

Post by **cn90** » 30 Jan 2014, 19:48

The connector is not sold separately.
Most people simply connect the wires together using butt connectors.

mindshadow · Post by **mindshadow** » 30 Jan 2014, 21:41

Yeah, that's kinda where I feel I am. I might just solder the wires together and call it good. I'm a little hesitant to cut the end off of the ECT that I just dropped $73 on though. :\ I'll probably hit the pull-a-part nearby, looks like they just got a '98 V70 in a week or so ago.

Just for reference, this is the broke part (ignore the red line, I stole the image from the beginning of the thread).

: BrokePart.png (115.5 KiB) Viewed 2079 times

Post by **cn90** » 31 Jan 2014, 07:53

If only the tab is broken, then no worry.
Simply use zip tie and tie them together, see BLUE dots...

: ect.JPG (18.58 KiB) Viewed 2070 times

mindshadow · Post by **mindshadow** » 31 Jan 2014, 09:30

Oh, no, that was just an illustration. It crumbled. The wires pulled out from the back of the harness, etc., so it's totally unusable.

Post by **cn90** » 31 Jan 2014, 09:41

Post a photo of your issue please...

mindshadow · Post by **mindshadow** » 31 Jan 2014, 10:58

I'm at work and the car is at home. Just imagine the wires coming from the car into the harness connector, sans the connector. So it's essentially just wires. I was having trouble removing the old ECT connector. After everything broke, I noticed some green corrosion in one of the connectors, so I assume the old ECT corroded to the harness and that was the cause of the break.

Post by **erikv11** » 31 Jan 2014, 11:05

This corrosion and failure is very common. Junkyard is an easy solution, as you suggested. The same connector is used in other places, I think the foglights are the same?

mindshadow · Post by **mindshadow** » 31 Jan 2014, 18:04

Found it in the junkyard. I also found a brand-new looking intake manifold on a '98 V70. Thinking about pulling it if anyone wants to buy it.

badaitimur · Post by **badaitimur** » 10 Feb 2014, 20:14

thanks a lot to cn90..
your idea give me a guide to cheat the ECU..
currently i've installed the variable resistor 1k ohm, parallel with the ECT sensor..(also with on/off switch n fuse, to avoid starting problem due to cold start and other short circuit problem)..

so, once i vary the resistor, the temperature give the reading accordingly from the resistance's level. just monitor via OBD2 (Android-Torque application)..at the same time i've installed external water temperature meter (water hose from radiator inlet)..
when ECU detect the temp. at 105C(because the changing of total resistance ECT+variable resistor), the cooling will trigger on, and actually at the same the real reading from external water temperature is just 90C..
so it's work..! thanks a lot..
but there are some problem about that parallel connection..the cooling fan still on because the ECT's resistance may decrease at certain level after cooling fan is on, but it not happen to variable resistor..
so actually at certain level temperature, the "ECT's resistance" may no decrease and the ECU still read about 102C, so fan remain on.. because from may observation, the cooling fan will shut off about 99C..

Dirk1966 · Post by **Dirk1966** » 11 Feb 2014, 11:15

My coolant temperature meter is always at the three o'clock position.
If anything is wrong with the ECT will it still sit at the three o'clock position?
I presume if this item is faulty that it will also cause an engine to use more petrol.

DIY: 1998 V70 ECT (Engine Coolant Temp) Sensor Replacement

Re: DIY: 1998 V70 ECT (Engine Coolant Temp) Sensor Replaceme