Testing Coolant Sensor
Thread Starter
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
Testing Coolant Sensor
Ok trying not to screw this up as most of you know i'm a noob at electronics. I'm trying to test the coolant sensor because I suspect that its bad. My book (not the FSM) says that you can ohm the sensor cold and then again after warming the car up and if the difference is not about 500 ohms then its probably bad. I'm testing the sensor at the little metal spikes that stick out it (where the connector meets). Probing the yellow (input) and the black (ground). Am I doing it wrong or does this mean the sensor is bad? I'm getting an infinite reading at cold, have not tried it yet warmed up.
Race Director
Joined: Jan 2006
Posts: 10,039
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From: CA
It's good to learn how to test some sensors and other components,and get results.You don't want to just throw new parts at it and hope.
But with a CTS,they are so inexpensive,and you have to take so much time to get at it anyway,once your that far in,you might as well buy a new one.The car's brain uses temp readings for alot of functions.It's a very important sensor , and you don't want to take a chance with it.
But with a CTS,they are so inexpensive,and you have to take so much time to get at it anyway,once your that far in,you might as well buy a new one.The car's brain uses temp readings for alot of functions.It's a very important sensor , and you don't want to take a chance with it.
Thread Starter
Team Owner
Joined: Feb 2006
Posts: 24,460
Likes: 7
From: sw Ohio
It's good to learn how to test some sensors and other components,and get results.You don't want to just throw new parts at it and hope.
But with a CTS,they are so inexpensive,and you have to take so much time to get at it anyway,once your that far in,you might as well buy a new one.The car's brain uses temp readings for alot of functions.It's a very important sensor , and you don't want to take a chance with it.
But with a CTS,they are so inexpensive,and you have to take so much time to get at it anyway,once your that far in,you might as well buy a new one.The car's brain uses temp readings for alot of functions.It's a very important sensor , and you don't want to take a chance with it.
but its not too terribly hard to get to, especially if you've removed all the A.I.R. crap like I have. I was just trying to save a trip to the store, but your right, it'll probably need to be replaced anyway.
Le Mans Master
Joined: Feb 2006
Posts: 8,753
Likes: 9
From: Louisiana
You can try ohming the CTS sensor, but may not tell if it is indeed bad or not. The FSM shows what the temp is related to the resistance. This sensor usually throws a code. If is is suspected, check the connection, wiring, and ohm it hot and cold. If in doubt just replace it.
Read back through YOUR old threads.
http://members.shaw.ca/corvette86/Code%2015.pdf
Read back through YOUR old threads.
http://members.shaw.ca/corvette86/Code%2015.pdf
Team Owner
Joined: Jan 2003
Posts: 20,316
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From: Summerland B.C. Canada
