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valleybusman
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Apr 28, 2013, 11:36 AM
Post #1 of 8
(1825 views)
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2006 E Seies cooling fan
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I am working on a 2006 E450 with automatic and 6.0 engine.Truck that is a stripped chassis vehicle has 117000 miles on her.A couple days ago the driver called me and said it over heated on him. I brought this vehicle back to the shop and checked the coolant level. Level was right up there.So I remembered not hearing the fan when it heated up.I used a scan tool and got a code that said couldn't communicate with the fan.This the KOEO test. So I started her up and ran a KOER test and again it said couldn't find fan.I also got one that said No.2 injector acting up.I unplugged connector and it showed power on the body side.If you know these rigs it's a B word to remove or even check out the fan.Any ideas on how to check before we dismantle the front end ? Hope you can help thanks
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Discretesignals
Ultimate Carjunky
/ Moderator
Apr 28, 2013, 12:23 PM
Post #2 of 8
(1798 views)
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Re: 2006 E Seies cooling fan
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What is the trouble code number for the fan?
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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valleybusman
User
Apr 28, 2013, 2:03 PM
Post #3 of 8
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Re: 2006 E Seies cooling fan
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I believe either 508 or 528
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Discretesignals
Ultimate Carjunky
/ Moderator
Apr 28, 2013, 5:00 PM
Post #4 of 8
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Re: 2006 E Seies cooling fan
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P0528
No signal from the fan speed sensor.
You going to need a high end scan tool to monitor the fan speed PID and to be able to actuate the viscous clutch valve.
If you don't see a fan speed signal, your going to have to use a lab scope or multimeter to troubleshoot the speed sensor circuit. You'll have to make sure that the hall effect has power and ground. Not sure if the hall effect sensor is a pull up or pull down design, so your going to have to unplug the fan speed sensor circuit to see what kind of voltage is on the speed sensor signal circuit with the PCM powered up. If you don't see any voltage, that means the hall effect sensor sends the square wave signal to the PCM. If you see a voltage, that means the hall effect sensor grounds the voltage from the PCM to generate the digital signal.
If your multimeter has frequency measurement capability, you can see what the frequency of the signal is. If you have a lab scope, you can see the actual signal and analyze the waveform.
With enough information from testing, you can figure out where the culprit is.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
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valleybusman
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Apr 28, 2013, 7:21 PM
Post #5 of 8
(1760 views)
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Re: 2006 E Seies cooling fan
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Thank you for the reply...now where is the sensor ?I have a fluke 88v tester will that work ? also am using a Gyensis 3.0 scan tool Or am I better to let a dealer in on this ?
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Discretesignals
Ultimate Carjunky
/ Moderator
Apr 29, 2013, 4:57 AM
Post #6 of 8
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Re: 2006 E Seies cooling fan
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The sensor is part of the fan clutch. You can make your checks from the connector at the fan clutch wiring harness or at the PCM itself.
Go to the manufacture side of the PCM using your scan tool and see if there are PIDs for the fan clutch and control valve duty cycle in the data stream. Also see if your scan tool can control the fan clutch from the special functions menu.
The meter should be able to check the fan clutch hall effect sensor power and ground. You might also be able to rotate the fan clutch really slow and watch the voltage change on the signal circuit from low to high. That would tell you if the hall effect sensor is functioning.
What is interesting is that you would think that Ford would have the fan clutch commanded to 100 % if the PCM didn't detect the fan speed signal. Weird.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Apr 29, 2013, 5:04 AM)
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valleybusman
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Apr 29, 2013, 8:25 PM
Post #7 of 8
(1720 views)
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Re: 2006 E Seies cooling fan
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I wanted to than you for all your help here.i found the problem when I went to remove the stator.The wire fell off and you can see where the fan had hit a few times and pulled the harness out of the stator.thanks again
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Discretesignals
Ultimate Carjunky
/ Moderator
Apr 30, 2013, 4:52 AM
Post #8 of 8
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Re: 2006 E Seies cooling fan
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That may explain why the fan didn't go 100% when the PCM didn't see the speed sensor signal.
oh, I forgot to add before doing all those checks, it is good to do a visual inspection first...LOL.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.
(This post was edited by Discretesignals on Apr 30, 2013, 4:53 AM)
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