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Author Topic: Coolant temp sensor.  (Read 3600 times)

Offline John Hartman

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Re: Coolant temp sensor.
« Reply #15 on: June 03, 2012, 03:51:41 pm »
in the lower rad hose itself?  IE, something in the rubber?

I used to live up north and there are recirculating heaters etc for cold winters, but I have never seen anything in the rubber lower rad hose in any DSM I have ever owned or worked on.

Some modern German cars have stuff like this, for coolant recirc but nothing in an older car comes to mind.

Toss up a pic?
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Offline Chad Giffen

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Re: Coolant temp sensor.
« Reply #16 on: June 03, 2012, 07:36:20 pm »
No its not in the rubber hose...     its directly beside the hose in the bottom end tank of the rad...     :D
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Offline John Hartman

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Re: Coolant temp sensor.
« Reply #17 on: June 03, 2012, 08:03:47 pm »
yea, that would be the sensor to turn on the fan.
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91 Eagle Talon TSi 5spd awd.  GT-12, TriFlow Cams, 850s, Tial, JIC, Jackal, sticky rubber.
86 Merkur XR4Ti 5spd, rwd, turbo, 91,381km.  Original paint, heated leather. intercooled, big VAM, Full 3" exhaust, Cossie sway bar, 16" tires.
06 Mazdaspeed6 6spd awd, DISI turbo, heated leather HIDs, Corksport, Cobb, Konig, Centric...
2018 VW Golf Alltrack turbo Tornado Red, 6mt, some free mods

Offline Brent Hunter

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Re: Coolant temp sensor.
« Reply #18 on: June 04, 2012, 12:16:41 am »
Not a 1gb thing cuz I drive a 1ga, and it is literally right in the middle of the lower rad hose.
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Offline Ryan Coft

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Re: Coolant temp sensor.
« Reply #19 on: June 04, 2012, 12:57:50 am »
Quote from: John Hartman on June 03, 2012, 08:03:47 pm
yea, that would be the sensor to turn on the fan.

X2
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Offline John Hartman

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Re: Coolant temp sensor.
« Reply #20 on: June 04, 2012, 03:52:34 pm »
Brent, pic please.  Nice and clear, well lit.

It almost has to be a plug in heater of some sort, like a recirculating heater/pump for winter time.
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91 Eagle Talon TSi 5spd awd.  GT-12, TriFlow Cams, 850s, Tial, JIC, Jackal, sticky rubber.
86 Merkur XR4Ti 5spd, rwd, turbo, 91,381km.  Original paint, heated leather. intercooled, big VAM, Full 3" exhaust, Cossie sway bar, 16" tires.
06 Mazdaspeed6 6spd awd, DISI turbo, heated leather HIDs, Corksport, Cobb, Konig, Centric...
2018 VW Golf Alltrack turbo Tornado Red, 6mt, some free mods

Offline Jordan Kruger

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Re: Coolant temp sensor.
« Reply #21 on: June 04, 2012, 07:20:24 pm »
Quote from: Brent Hunter on June 04, 2012, 12:16:41 am
Not a 1gb thing cuz I drive a 1ga, and it is literally right in the middle of the lower rad hose.

Middle of the rad hose?

PIC!
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Offline Brett Haviland

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Re: Coolant temp sensor.
« Reply #22 on: June 04, 2012, 08:08:40 pm »
sounds like a aftermarkt "block" heater... but they dont mount in the block... that style just requires cutting the lower rad hose, and putting the heater in it.  It will have a 120 AC cord coming off of it.


On 1G's with A/C there is a 2 wire coolant temp sensor on the top of the thermostat housing, closest to the rad cap... that one is for the A/C. 

The one for the ECU that can throw the code is down below it (also 2 wire, but uses a different pigtail, and right next to it sits the 1 wire coolant sensor that the gauge on the instrument cluster uses.

And like everyone stated there is also a 2 wire coolant sensor mounted in the bottom of the radiator... on the passenger side (on a LHD vehicle) near where the lower rad hose connects to the radiatior.  This sensor is used to control the cooling fans on/off
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Offline Ryan Dronsfield

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Re: Coolant temp sensor.
« Reply #23 on: June 05, 2012, 06:15:04 pm »
Solution: go to lordco/napa/Canadian tire
              Ask for a temp sensor for a 90-94 DSM or a 95-98 if u got that

              Match it with the one on the DSM already that's the one u need to replace

Or: replace all :D at the same time to be super safe :D


I had the same symptoms with my supra vary frustrating pent hours fingering it out then gave up took it to a shop they charged me 300$ to replace thatch little sensor lol witch made me a lil agravated :P so now that's were I start :)
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