Coolant Temp Sensor Issue

[gvr4737]

So i finally got my car 99% done and running. All has been going well but I ran into my first issue. my wiring on my thermostat housing harness was looking pretty ratty soo i decided to cut it back some and solder/ wire in new wiring to freshen it up . the car was running fine . Than I noticed my temp gauge was not working at all, So i figured i had crossed one of the wires . soo i got rid of my spades and I wired in a new chunk of the harness peice that i got from a local junkyard. Here is my problem, The car will not run with the Coolant Temp Sensor plugged in on the thermostat housing . I can keep the Temp gauge wire plugged in, " single spade on the right of thermo sensor" and ill get a temp reading on my dash, but the temp sensor itself can not be plugged in. The car will just sit there and crank and crank and crank. The coolant temp sensor and the gauge sensor consists of 3 wires... a green w/black, yellow w/green, and yellow w/green . 1 of the yellow w/green goes with the green w/black to the temp sensor and the other yellow w/green goes to the gauge read out for the cluster.

I started tested my harness to see if i was having a short some where since the coolant temp sensor works off resistance... and the wiring seems fine " even though the mitsu manuels dont give u too in depth on how to check it"

does anyone have ANY idea why my car is acting like this and why it wont run with the coolant temp sensor plugged in. Also does it matter which yellow w/green wire goes to my gauge read out sensor compared to the yellow w/ green that goes to the plug for the coolant temp sensor ...


Please Help!!!!!


- Thanks -



Pics/links would be helpfull too

[gtluke]

thats fucked up.

[gvr4737]

I finally got my wiring straightened out where i know its the correct way...

i installed a brand new coolant temp sensor and tested the gauge sensor.. both are perfect condition

turn the key to the car and it still wont run

than i found out this... if i take a peice of wire and connect it to the green w/ black wire off the temp sensor than connect it to a solid ground ... the car will fire right up and work perfect.. let it run for 10 minutes and no CEL yet. Soo is the green w/black wire a ground that maybe somewhere in the harness isnt getting the right connection and cause it to run shitty.. and adding this extra ground to it helps????

any idea's????

i didnt solder in the ground wire i ran off the green w/black yet cause idk if its the proper thing to do


let me know


thanks




" Luke i called your cell yesturday while this was happening to see if u had any idea's ... but u didnt pick up"

[iboostdoyou]

Doubtful that this will help... but it's a start :cry:
I tried...
But definitely check the entire harness and just keep changing shit until it works. Make sure the connectors arent touching etc.

http://dsmtuners.com/forums/showthread.php?t=219408&highlight=coolant+temp+sensor

[gtluke]

don't assume gvr4 wiring is the same as TEL
there are differences, especially in that area you are working on. the TEL harness is totally different there. the wire colors are probably 90% the same, watch out for that 10%

[atc250r]

Check the GVR4 board for my answer. I think I know what 's wrong with it.

[EDT007]

I had a similar issue. The problem is occuring because there is either a short somewhere, mis-wiring or possibly a bad lead in the ecu. When you are grounding the sensor it is essentially the same as connecting both ends of the harness into a closed loop. Your ecu is not seeing the proper values in order for the cold-start enrichment to take place and start. Your car will just keep cranking and cranking until the battery dies. In my case it ended up being a short in the wiring but if you have already checked your wiring I would pull the ecu and check it. You might want to go to vfaq and check the pinouts and maybe see if there is any corrosion.

Check out the following sites:

http://dsmlinkwiki.redacresracing.com/d ... round.html (http://dsmlinkwiki.redacresracing.com/default.aspx/DSMLink/BlownSensorGround.html)

http://dsmlinkwiki.redacresracing.com/d ... oints.html (http://dsmlinkwiki.redacresracing.com/default.aspx/DSMLink/FuelTrimUpdatePoints.html)

http://dsmlinkwiki.redacresracing.com/d ... ation.html (http://dsmlinkwiki.redacresracing.com/default.aspx/DSMLink/ECUWiringInformation.html)

Hope I could be of some help. Goodluck!!

[gvr4737]

i didnt cut the ground wire from the sensor and put it to a body ground... i basically just soldered another peice an open part of the wire and connected that to the ground...

the car acts how it always did at startup .. idles high at like 2500, than drops down to idle when warm.. also my wideband is hooked up all times and its working properly

i just would like someone that could check the pins on my ecu cause i doubt the wire got cut or messed up anywhere in the line