Fans running a lot??

[Lew L]

.

OK I'll look there tomorrow.

 

[Lew L]

Found it!!

.

Well I've got it in sight. I was planning on draining and replacing the coolant anyway. Tight spaces. Not sure how to get the electrical plug undone though. Any tips on draining the coolant??? I know not to use the drain plug but undo hose.

Thanks again for all your help so far. Will need service manual info on testing the temp sensor.

Lew L

 

[trikermutha]

I will copy and send the test for the sensor when i get home

To drain remove the right lower radiator hose. It will be tight. And the clamp has to be cut off

 

[Lew L]

.

Can I use a different clamp. A stainless steel screw type???

 

[trikermutha]

Yes. I never liked them but yes you can.

 

[trikermutha]

CTS Resistance Test at Component 1. Remove main power relay (R3) in LH fuse box. Refer to POWER DISTRIBUTION AND GROUNDSsubsection. CAUTION Do not disconnect CTS when vehicle is powered. If CTS is disconnected while vehicle is powered, the ECM will cause the cooling fans to come on, possibly resulting in injury. 2. Disconnect CTS connector. 3. Using a multimeter set to " ", measure the resistance through the CTS resistance and compare the resistance value obtained to the sensor temperature table. REQUIRED TOOLS FLUKE 115 MULTIMETER (P/N 529 035 868) CTS SENSOR Pin 1 Pin 2

TYPICAL SENSOR TEMPERATURE TABLE TEMPERATURE RESISTANCE (ohms)
°C - °F CTS (Ohms)
40 - 40 - 38457 to 52630
10 -14 - 8208 to 10656
20 - 68 - 2233 to 2780
80 - 176 - 297 to 349
120 - 248 - 105 to 122

If resistance measured is out of specification, replace the CTS. If resistance measured is within specification, reconnect the CTS and carry out the CTS RESISTANCE TEST AT ECM.

 

[Lew L]

.


Thanks triker,
Numbers seem a jumbled mess with no punctuation. I got some of them figured out. I have test leads and a FLUKE meter.

 

[trikermutha]

Sorry was copying and pasteing from the manual. Basically its temperature. Then resistance value reading you should get when testing the sensor. I will try and fix it later.

 

[trikermutha]

Ok I updated posted 46 hope that helps.

 

[UtahPete]

CTS Resistance Test at Component

1. Remove main power relay (R3) in LH fuse box. Refer to POWER DISTRIBUTION AND GROUNDSsubsection. CAUTION Do not disconnect CTS when vehicle is powered. If CTS is disconnected while vehicle is powered, the ECM will cause the cooling fans to come on, possibly resulting in injury.

2. Disconnect CTS connector.

3. Using a multimeter set to " ", measure the resistance through the CTS resistance and compare the resistance value obtained to the sensor temperature table. REQUIRED TOOLS FLUKE 115 MULTIMETER (P/N 529 035 868) CTS SENSOR Pin 1 Pin 2

TYPICAL SENSOR TEMPERATURE TABLE TEMPERATURE RESISTANCE (ohms)

°C / °F CTS (Ohms)
40 / 40 38457 - 52630
10 / 14 8208 - 10656
20 / 68 2233 - 2780
80 / 176 297 - 349
120 / 248 105 - 122

If resistance measured is out of specification, replace the CTS.

If resistance measured is within specification, reconnect the CTS and carry out the CTS RESISTANCE TEST AT ECM.

 

[trikermutha]

Thanks Pete:thumbup:

Its been a long week..:shocked:

 

[Lew L]

.

And how do we get the temp in degrees???? I have a digital infra red thermometer w/laser pointer. Could aim it at the CTS and take an Ohms reading i guess.

 

[trikermutha]

Suppose you could use a heat gun.

As long as the readings are close to the temperature in ohms it should be good.

If you want to test at different temps try a heat gun, hair dryer to test. You can use your laser thermometer to reference the Fahrenheit at the sensor.

 

[Lew L]

.

Well got the new CTS and it tested well especially in the 176* at 312 Ohms. R and R the coolant and CTS this weekend.

Much thanks to all you guys who spent your time helping me on this fix. Shop would have been $125/hr to diagnose and probably another hour to replace.

Lew L

PS: They had 11 ( eleven) in stock. This says to me that this is another cheaply sourced product that BRP buys with LOW Quality Control.

 

[trikermutha]

So you installed a New CTS was the old one bad??

remember to run the engine till the fan turn on after the coolant change. This way you know the thermostat has opened.

 

[UtahPete]

. Well got the new CTS and it tested well especially in the 176* at 312 Ohms. R and R the coolant and CTS this weekend.

I hope you will be able to take pictures of the procedure and post them here. That would be great!

 

[Lew L]

So you installed a New CTS was the old one bad??

remember to run the engine till the fan turn on after the coolant change. This way you know the thermostat has opened.

I was planning on a test run and watch the gauges. It's getting hot here and the fans will come on. Thank again

 

[Lew L]

I hope you will be able to take pictures of the procedure and post them here. That would be great!

After taking off the sound deadening /support panel on the left of the spyder ( the one you remove for air filter access), it's a tight fit but quite obvious where the CTS is. A deep reach socket with a u-joint will pull it right out. The CTS is made by Bosch---- you think they would last a long time.

 

[Lew L]

So you installed a New CTS was the old one bad??

remember to run the engine till the fan turn on after the coolant change. This way you know the thermostat has opened.

I tested it in place, using the digital laser infrared thermometer, test leads with alligator clips, and a Fluke 23. I'll test it when I pull it out using hot water and a high temp digital thermometer.

 

[trikermutha]

I tested it in place, using the digital laser infrared thermometer, test leads with alligator clips, and a Fluke 23. I'll test it when I pull it out using hot water and a high temp digital thermometer.

So the test passed for the CTS. or was that the new one and you are still going to test the old?

Anyway good luck