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pushkick
Samba Member
Joined: August 09, 2007
Posts: 1366
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 Posted: Sun Apr 30, 2017 6:04 pm Post subject: Temp gauge quit working |
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havent found much data on the coolant temp sensor for the gsuge display and blinking light. what is the test procedure for the gauge if you dont have a vw tool what voltage or resistance ? i have searched threads but have no found no conclusive info. how to test temp sensor for failure? how to test gauge and wires from sensor? is there a circuit diagram in bently i have not found it.
any help is appreciated.
_________________
i see said the blind man to his deaf dog
i am going to quit smoking and drinking and die a healthy man. gotta laugh
there is no deed to the planet earth
1990 vw automatic camper |
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Ahwahnee
Samba Member
Joined: June 05, 2010
Posts: 9798
Location: Mt Lemmon, AZ
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pushkick
Samba Member
Joined: August 09, 2007
Posts: 1366
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| Posted: Sun Apr 30, 2017 8:10 pm Post subject: Re: temp guage quit working |
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Ahwahnee your post is greatly appreciated thanks , that is a great thread with a lot of good info, it looks like the temp gauge sensor is a rtd temperature device and not a thermocouple, so the resistance goes down or varies inversely as temp goes up. this means there is a constant current and the voltage varies as the resistance changes with temp. rtd's have a very linear relationship between resistance and temperature so only two measurements at different temps should be needed to check calibration.
_________________
i see said the blind man to his deaf dog
i am going to quit smoking and drinking and die a healthy man. gotta laugh
there is no deed to the planet earth
1990 vw automatic camper |
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