Toyota ee90 2e to 4efe engine swap

Toyota

pwuser151220154381 (Kanishka Prasad) 2018-02-17 12:10:41 +0500 #201

bro my original relay is normally closed !!

Hassan1991 (Electrical Engineer ) 2018-02-17 12:28:07 +0500 #202

Which relay your checking, fan relay is located inside the bay fuse box

pwuser151220154381 (Kanishka Prasad) 2018-02-17 12:28:54 +0500 #203

yes !! im talking about the green relay which is in the fuse box !!

pwuser151220154381 (Kanishka Prasad) 2018-02-17 13:44:03 +0500 #204

bro its happening the other way !! the fan offs when the sensor heats up !!

SER_GTR (SER_GTR) 2018-02-17 14:00:21 +0500 #205

how many sensors can you locate

there's Engine Coolant Temp sensor as well as other for auto fan

one is for gauge cluster also...so there's actually 3 of them

the fan one is usually white in color and the grey 3 pin one is usually for ECU...

locate them all 1st and check...they are on opposite direction and nearby same flanges usually ....

Hassan1991 (Electrical Engineer ) 2018-02-17 23:48:26 +0500 #206

Yes as i told it's connected on normally open it should be done on normally close pin, if it's connected on 87a pin then its right, you can all check when you switch on the Ignition if relay clicks then it's right.

pwuser151220154381 (Kanishka Prasad) 2018-02-18 14:24:04 +0500 #207

there is only two sensors one sensor has 3 pins as ive shown and one has single pin !!

this the relay that im having !!!

This relay normally shows continuity !! when given power it stops current flowing !!

in my case

when i heat up my sensor the fan turns off !!1

i dont know what to doo !!

pwuser151220154381 (Kanishka Prasad) 2018-02-18 14:28:30 +0500 #208

the mechanism is working but in reverse order !!

pwuser151220154381 (Kanishka Prasad) 2018-02-18 18:23:09 +0500 #209

bro im gonna use a toyota 110 thermo switch and wire it separately !! i dont know what else could be done !!! or
the other only solution is finding a thermo switch which is increasing resistance as it gets heat !! ill try that also !!

Hassan1991 (Electrical Engineer ) 2018-02-18 19:24:15 +0500 #210

those red and yellow are auto fan switch

Hassan1991 (Electrical Engineer ) 2018-02-18 19:29:33 +0500 #211

connect relay in this way

pwuser151220154381 (Kanishka Prasad) 2018-02-18 19:43:55 +0500 #212

bro that was in my old engine (2e)

pwuser151220154381 (Kanishka Prasad) 2018-02-18 19:49:07 +0500 #213

bro the fan relay is switch on by the ecu not the sensor !!! in my case the pin 20 on connector 1 light green with black strip wire !!

pwuser151220154381 (Kanishka Prasad) 2018-02-18 19:52:49 +0500 #214

plus in diagnosis mode the check engine light blinks continuously as mention in https://www.troublecodes.net/toyota/ there is no error !! in the system !!! but i dont understand why my cooling fan mechanism operates in opposite way !!

pwuser151220154381 (Kanishka Prasad) 2018-02-18 19:59:07 +0500 #215

bro whats the other pin opposite to sensor pin on relay !! not clear as in the background is black !!

Hassan1991 (Electrical Engineer ) 2018-02-18 20:20:09 +0500 #216

Positive from Ignition switch
Just connect relay in this way with stock sensor
It will lead neutral to the fan.
That's how i connected . My ae80 got all custom wiring including even head lights

pwuser151220154381 (Kanishka Prasad) 2018-02-18 20:21:18 +0500 #217

then doesnt the ecu need a water temp signal ?

Hassan1991 (Electrical Engineer ) 2018-02-18 20:23:16 +0500 #218

It does. The other sensor you shown in pic is coolant sensor which is connected to THW pinout.

Hassan1991 (Electrical Engineer ) 2018-02-18 20:25:24 +0500 #219

Same sensor is in my 5afe for fan

pwuser151220154381 (Kanishka Prasad) 2018-02-18 20:27:48 +0500 #220

bro the 3 pin sensor leads to ECU ! white wire to pin 3 THW on ecu and brown wire to pin 24 (EI computer ground )

and third pin yellow with green strip ends up in socket may to be connected to the cluster