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Coolant temp sensor

Where is the coolant temp guage sender on the V6 model?

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The Engine Coolant Temperature (ECT) Sensor is located in the thermostat housing of the cylinder head.
coolant temp sensor - 6bed718e-7818-4189-bcc2-a3383503d61c.jpg

Posted on Oct 17, 2013


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I have a 2000 Chevy astrology van with a 4.3 l. Vote v6. The coolant temp Guage spikes to max and return to normal periodically. The engine is not over heating.

it could be that then wire to the sender unit ( not sensor as it is different ) is loose or shorting out on the head
there could be an air lock in the cooling system that is allowing spasmodic water flow passing the sender unit and sending the gauge to hot
if there is no coolant around the sender unit ,it will read cool and and flush will send it hot until the coolant subsides and then it will read cool

Aug 08, 2015 | Cars & Trucks

1 Answer

High idle and no reading on temp gauge

check that there is coolant or fluid in the radiator as a coolant temp sender cannot read air as it is a vital part of the injection system for the ecu to know if the engine is cold and if sender relays no reading it is telling the ecu that it needs to ritchen the fuel mixture (possibally the reason for the fast idle) to get the engine up to normal operating temp as soon as you live in a really cold climate a thermostat that is jamed in the open position will cause it a long time to reach a warm reading. hopefully it is just the sensor wire off the coolant temp sender and by replacing it will return ever thing to normal

Mar 01, 2014 | Isuzu Pickup Cars & Trucks

1 Answer

Good mormning all< i have a 1600 4cylinder in my sami. when idleing the guage reaches on H on the temp but yesterday we took a temp gum from the maachinac and the engine temp read 152F (that was the...

1985? Samurai? (no vitara) NO YEAR makes the real hard.!

the dash guage is but a toy and not and instrument.
if fact it has no numbers on it, no 180F. markes
the gauge is reading hot because the 1 pin 1 wire, sender wire
for the gauge is grounded out, remove this wire from sender
and the guage, must go to low.
btw here is the G16 being gauged, FULL HOT.
the gauge and sender tests are in the FSM. read that.

here is the G16
the no num gauge.
here is the best way to measure engine heat.

see how well the RAD works, see this. big drop !

on the G16, we test the guage like his.
yours is near identical.

on you car pull the sender lug. stuck H.
guage drop. to L, sender bad. or WRONG sender (common)
guage at H, then follow wire, from it to harness, ahhh, all cut up
and bare and hitting ground, bingo.

Jan 25, 2014 | Suzuki Vitara Cars & Trucks

1 Answer

1987 suzuki samurai 1.3 stock engine. Temperature gauge is not working I decided to replace the Coolant Temp Sending Unit after market sender. I have the sender with two prong. Still my gauge is not...

rare car, how cute. its a 1.3L what ,its EFI , not carb.
the ECT and guage are not related at all.
each has its own sensors.
dont use a torch you will kill it, use hot water man.
the guage is a 1 wire sensor. it has a different resistance profile than
the EFI Engine coolant sensor ECT. is a different sensor.
the EFI sensor 2 pins, reads 300 ohms hot and about 3000 ohms cold.
hot is 200 F, not torch 2000f hot. for sure. never exceed 212f on any sensor ever.
I must presume you are futzing the wrong sensor.
first off, I will cover just the gauge, and the fsm is on line
for free, and you can read the guage tests. they are simple simon,

see here, see the books?

im and expert on the sidekicks but they are close to sammi.
infact its and evolutionary change.

the guage sender is sold everywhere, and has unique spec.s.

ill use so you can see them all. sold.
first off the guage has very low resistance,as does the gauge sender
that is because is thermal acting the guage gets hot and the needle moves, very very crude this. very very old school stuff.
they did the bs until 1995.
chapter 21. electrics. sammi.
page 21-12 , fuel level meter and guage.
direct link to that here.
see that?
pdf page 145
use a 194 lamp and ground the yellow wire as shown
meter goes upscale the meter is good.
now the sender.
is RTC reverse temperature coeffiecent, that is
hotter = lower ohms. pdf page 146 left.
122f is about 155 ohms
176F = about 50 ohms
212f (boiling water) is 28 ohms and gauge shows HOT.

that is it for the 1 wire sensor.
stupidly they say to put sealing tap on threads,
dont, or you get an open ground. amazing...
tighten firmly or risk cracking the intake. its a tapered British thread.

now the rock. the right sensor for JUST the Guage , coolant.

a real FSM
and a real source of parts, 1 post.
all for free,

Aug 27, 2013 | 1988 Suzuki Samurai

2 Answers

Just replaced the coolant temp sensor on my 96 ciera still no reading on the guage, fuses are good also what else could be causing the problem

maybe faulty guage ?? remove wire from sensor and earth it on engine gauge should rise fully if not gauge is faulty?????? ps turn on ignition when checking.........

Sep 08, 2011 | 1996 Oldsmobile Cutlass Ciera

3 Answers

I Have a 1992 dodge dakota And my temp gauge does not move. Do you know whats wrong with it

find temp sender turn key on and disconect wire from sender and earth it if guage moves to hot sender falty, if not guage faulty, or broken wire,or no power to guage

Aug 14, 2011 | 1992 Dodge Dakota

1 Answer

Temp guage dont read

U are talking about two different sending units, one is the Engine Coolant Temp sensor, the other is the temp guage sender, sounds like you have a bad thermostat, if the engine doesn't reach the proper operating temp it will set a code for the engine coolant temp sensor, and the guage will not move or move very little, replace your thermostat and both problems will go away.

Mar 02, 2009 | 1996 Pontiac Grand Am

1 Answer

2001 malibu 3.1 v6 cooling fans run all the time and temp gage

replace thermostat, this fixed my car, cooling fans keep coolant below temp guage parameters.

Jan 01, 2009 | 2001 Chevrolet Malibu

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