Hi, I have a Ducati 244 (2006) for some reason both cooling fans are running 100% since yeu when I was in a traffic jam
Anyone has an idea how to fix this ?
Anyone has an idea how to fix this ?
Yes after 15 seconds or so @Communicator do you know which relay this can be ?Hi
Do they Stop when key is removed..?
Can’t tell as I can’t remember the fusebox layout or what relay it is out of context but
Look for any moisture or, if dry, any chalky deposits or verdigris on contact
Rather large current draw with two fans. Fan control cct is different, with aircon fitted.yes it has (working) airco and only has 60.000 km on the clock, can it hurt much when both fans are on while driving?
Sorry for the delay. I had to undertake taxi duty from our local rail station.Having had time to consider the problem while eating, I think that the problem may be with the engine temperature sensor for the ECU, or associated wiring.
I have posted the circuit for basic (non aircon) fan control, as it will be easier to follow.
Both fan control relays have a permanent supply from the battery, via fuses F06, and F07.
The relays are controlled via the ECU, in response to the sensor K036.
As @sliderr has reported, the fans remain on for about 15 minutes, after turning of the ignition. This is correct, if the ECU "thinks" that the engine temperature is too high.
If the problem was with water ingress to the engine bay fusebox, B001, causing the relays to stay operated, the the fans would not stop after 15 minutes. They would continue to run.
If anyone thinks that my logic is wrong, please comment.
The 2.8jtd has two temperature sensors, but they are not visible before removing other components. I think that the sensor K036 is a negative teperature coefficient thermistor, but intend to check, and post again.
no worries at all! i found a video there are indeed 2 sensors one for the dash and one for the ECU - going to replace that one, here is the link
Thanks again, i will post the outcome.
Sounds fine to meAs @sliderr has reported, the fans remain on for about 15 minutes, after turning of the ignition. This is correct, if the ECU "thinks" that the engine temperature is too high.
If the problem was with water ingress to the engine bay fusebox, B001, causing the relays to stay operated, the the fans would not stop after 15 minutes. They would continue to run.
If anyone thinks that my logic is wrong, please comment.
Good news.. maybe it had dried out from that rainwaterToday after a 250km trip the fan suddenly went back to normal behavior, i let the engine run for a bit and the fan came on and went off - no clue why or what happend.
no worries at all! i found a video there are indeed 2 sensors one for the dash and one for the ECU - going to replace that one, here is the link
Thanks again, i will post the outcome.
I have not viewed the video. I agree with the above, except that it may not be a simple grounding problem. Sensor K036 has two pins, which are both connected to the ECU. The wire connected to pin 2 is possibly the lower voltage side. A false high reading could be due to leakage between the pins, or from pin 1 to earth.A great video to show where those sensors are loacated. Unfortunately the author's conclusion is badly wrong. There is NO way a head light can change a NTC's resistance
It's obviously a grounding problem.
Sensor K035 is not connected to the ECU. It is used by the instrument panel for the temperature gauge, and over temperature warning light. The eLearn diagram E4010 is nonsensical, unless there is a ground connection between the sensor element, and the thermostatic contact for the warning light.While the ECU measures the K035 resistance via 2 dedicated wires, the speedometer relies on the grounding via chassis to battery to engine to sensor case.
As above it is K035 that is used by the instrument panel.If any high current builds up a voltage drop in a weak grounding system this appears at the temp gauge and will be interpreted as low sensor resistance to indicate high temperature. Note that K036 features 2 pins, one each for the resistor and the light.
Replacing the sensor may well have cured the issue, but he might well have reinstalled the original one with teh same success.