Suspect water pump

SouthArk370Z · 07-09-2017, 09:29 PM

Quote:

Originally Posted by Z_ealot

Question: is there a way to test the high and low speed cooling fan function on our cars? If you didnt see the video already i did test them with a direct 12 volt from the battery which im assuming would run them at their high setting, but cant seem to find an answer anywhere on how to test the low speed setting.

According to page EC-486 of FSM, "Cooling fan motor receives cooling fan motor operating voltage from cooling fan control module. The revolution speed of cooling fan motor is controlled by duty cycle of the voltage." Ie, it turns the power on and off real fast. An oscilloscope would work to check output.

Z_ealot · 07-09-2017, 09:44 PM

Quote:

Originally Posted by SouthArk370Z

According to page EC-486 of FSM, "Cooling fan motor receives cooling fan motor operating voltage from cooling fan control module. The revolution speed of cooling fan motor is controlled by duty cycle of the voltage." Ie, it turns the power on and off real fast. An oscilloscope would work to check output.

So what you're saying is im SOL lol

SouthArk370Z · 07-09-2017, 10:10 PM

Quote:

Originally Posted by Z_ealot

So what you're saying is im SOL lol

You should be able to rent/borrow an o'scope.

Some multimeters will work and would be easier to use/interpret. https://duckduckgo.com/html?q=multim...uty%20cycle%22

Z_ealot · 07-09-2017, 10:23 PM

Quote:

Originally Posted by SouthArk370Z

You should be able to rent/borrow an o'scope.

Some multimeters will work and would be easier to use/interpret. https://duckduckgo.com/html?q=multim...uty%20cycle%22

What im wanting to test is the fan motors themselves though, the control module i know is good as it is s brand new unit, the motors on the fans is what im unsure of. I've seen guys test the fan speeds with the higher priced scan tools, but just wasnt sure if there was a way to test the motors at their different speeds without that

Optimiser · 07-10-2017, 02:19 AM

Quote:

Originally Posted by SouthArk370Z

You should be able to rent/borrow an o'scope.

Some multimeters will work and would be easier to use/interpret. https://duckduckgo.com/html?q=multim...uty%20cycle%22

I'm amazed at how complicated this is getting to try and resolve! Interesting though.

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