Jling Posted March 16, 2022 Share Posted March 16, 2022 Hi folks, I’m not sure if this is the proper area to post this but I have a 2014 connect. I’m having an issue, as soon as I open my drivers door the engine cooling fan comes on. It doesn’t make any sense to me because the van can sit over night with the keys in my pocket and I open the door and the fan kicks on. I’ve changed the coolant temp sensor in the head, and tried a BCM out of another van with no success. The AC pump will not turn on even though it’s full. I’m not sure if that would be part of the same problem or not. Has anyone else had this issue? Quote Link to comment Share on other sites More sharing options...
Don Ridley Posted March 16, 2022 Share Posted March 16, 2022 (edited) Like almost every other problem with modern vehicles, you need a scan tool to diagnose this. A good scanner will show if there are any temperatures or other parameters (PIDs) that are reading out of spec that are causing the system to turn on the fan. The scanner will also show all error codes, DTCs (not just the check engine light) A little research is required to see what causes the fan to turn on and what would also prohibit the operation of the AC. Getting data is easy but understanding what it says is not. For less than $100 you can get an OBD Ex converter and run Forscan on a PC (or your phone) to monitor any parameter in the vehicle. Otherwise you may have to take it to a shop that has the tools and experience. Edited March 16, 2022 by Don Ridley Quote Link to comment Share on other sites More sharing options...
G B L Posted March 16, 2022 Share Posted March 16, 2022 Again Don is correct about the trouble shooting process. Does the fan never shut off ? does it go off and on with the door? Quote Link to comment Share on other sites More sharing options...
Jling Posted March 16, 2022 Author Share Posted March 16, 2022 Yes the fan will shut off after a few seconds. Also The fan does run constantly while you have the van started. I’ll have to find a shop or someone with a good scanner to hook it up. Quote Link to comment Share on other sites More sharing options...
G B L Posted March 16, 2022 Share Posted March 16, 2022 If you turn the heater to the off position does the fan shut off? If it does not find the fan relay and pull and test it. Quote Link to comment Share on other sites More sharing options...
Jling Posted March 16, 2022 Author Share Posted March 16, 2022 No, it doesn’t change anything. I’ve changed the relays under the hood for the cooling fan as well and it still does the same thing. Would the computer possibly need reflashed? Quote Link to comment Share on other sites More sharing options...
Jling Posted March 16, 2022 Author Share Posted March 16, 2022 39 minutes ago, G B L said: Again Don is correct about the trouble shooting process. Does the fan never shut off ? does it go off and on with the door? 19 minutes ago, G B L said: If you turn the heater to the off position does the fan shut off? If it does not find the fan relay and pull and test it. 2 hours ago, Don Ridley said: Like almost every other problem with modern vehicles, you need a scan tool to diagnose this. A good scanner will show if there are any temperatures or other parameters (PIDs) that are reading out of spec that are causing the system to turn on the fan. The scanner will also show all error codes, DTCs (not just the check engine light) A little research is required to see what causes the fan to turn on and what would also prohibit the operation of the AC. Getting data is easy but understanding what it says is not. For less than $100 you can get an OBD Ex converter and run Forscan on a PC (or your phone) to monitor any parameter in the vehicle. Otherwise you may have to take it to a shop that has the tools and experience. Is the Forscan hard to use? Quote Link to comment Share on other sites More sharing options...
Don Ridley Posted March 16, 2022 Share Posted March 16, 2022 3 minutes ago, Jling said: Is the Forscan hard to use? Forscan is easy to use but it takes some time to understand error codes and real time data. See for yourself at forscan.org. Quote Link to comment Share on other sites More sharing options...
Jling Posted March 16, 2022 Author Share Posted March 16, 2022 9 minutes ago, Don Ridley said: Forscan is easy to use but it takes some time to understand error codes and real time data. See for yourself at forscan.org. Thanks, I’ll check it out. Quote Link to comment Share on other sites More sharing options...
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