Electric cooling fan issues
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Joined: Feb 2019
Posts: 99
Likes: 61
From: So Cal
I usually notice the fans are on after I have been driving a little while. Most noticeable when pulling into a drive thru or when I pull into garage. A/C not always on but fans are. Last night for sure no A/C was on .Coolant temp will be as low as 200-205 but fans do not shut off.
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Joined: Feb 2019
Posts: 99
Likes: 61
From: So Cal
Ok test drive tonight. Drove about 15 miles to dinner with no A/C. Arrived at restaurant with no fans on.
Drove home with A/C on. Pulled into garage and fan were on high. Turned off A/C , fans stayed on high. Coolant temp 205. Waited 5 min coolant down to 199. Fans stayed on. Turned off car. Waited 1-2 minutes. Started car ... no fans. ?? Outside temp 61*
Drove home with A/C on. Pulled into garage and fan were on high. Turned off A/C , fans stayed on high. Coolant temp 205. Waited 5 min coolant down to 199. Fans stayed on. Turned off car. Waited 1-2 minutes. Started car ... no fans. ?? Outside temp 61*
Last edited by Lil Critter; Nov 12, 2019 at 10:56 PM. Reason: Clarification
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Joined: Sep 2013
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From: Cape Coral, Florida
Do you know your way around a 12 volt test light ??...if so you will have to access the PCM and the high speed cooling fan relay control wire...it is a dark blue wire on pin 33 on the C2 connector...if you turn the AC off and the fans remains on connect the test light to battery POSITIVE...back probe the wire and see if the test light illuminates...if it does the driver in the PCM is sticking closed keeping the circuit grounded...you said the fans were on high speed !!
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Joined: Feb 2019
Posts: 99
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From: So Cal
Narrowed the problem down to tune that was in the car. The turn on/off temps were way to low. A couple of adjustments on the lap top seems to have taken care of it. Set back to stock temp default. 👍👍