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Thread: Radiator Fan Duty cycle map

  1. #21
    kc427's Avatar

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    But one thing we may need to concern, I heard that, but not sure, Mitsubishi needs higher temperature to keep the emission low, so if need to do the MOT, these settings may need to be restored back to original.

  2. #22
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    very good point, an MOT friendly setting would be good.
    which is why the multi maps of the other kenneths rom 2.0 is good idea.
    flick a switch and put the ECU into ultimate eco/MOT mode for fuel maps and ignition maps limited boost and now temp maps. it is the full combo.

    Bye for Now!

  3. #23
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    although I haven't tried Kenneth's Rom 2.0, it sounds very useful to switch the tables.

  4. #24
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    Radiator Fan Duty cycle map

    I will have to do a bit of logging to check the operation of the new table definition.


    Sent from my space-aged gizmo
    Last edited by Davezj; 11-07-2016 at 01:01 PM.

  5. #25
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    it should be fine, but better to confirm that

  6. #26
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    yeh just confirm it is working i have set the full main fan section cols 1-3 to 100% so it should be easy to get the fans on full blast.

    which engine temp were you monitoring with evoscan was it coolant temp or coolant temp scaled?

  7. #27
    ersanalamin's Avatar

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    well done guys, really love your work. why dont we just we replace/ delete the fan control deff file on previous vr4 base with the new fan control deff file and create the new vr4base file? its confirmed working wasnt it? just curiuos by routing evos stock deff file maybe we can revise and unfolded the new feature/deff file?
    Last edited by ersanalamin; 12-07-2016 at 08:28 PM.

  8. #28
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    Well my fans now come on much earlier in the temperature range, which is nice.
    I just need to connect the relay to the intercooler fans.


    Sent from my space-aged gizmo

  9. #29
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    I used the coolant temp scaled. I have the Defi meter, and the water temp sensor was installed on the upper hose, and the reading from the Defi is quite close to the coolant temp scaled from Evoscan, so I assume the coolant temp scaled is fine.


    Quote Originally Posted by Davezj View Post
    yeh just confirm it is working i have set the full main fan section cols 1-3 to 100% so it should be easy to get the fans on full blast.

    which engine temp were you monitoring with evoscan was it coolant temp or coolant temp scaled?

  10. #30
    Davezj's Avatar

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    Excellent info.


    Sent from my space-aged gizmo

  11. #31
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    i have been doing a bit of logging recently and i am having an issue with the fan duty cycle.

    my fans will only run at the speed that is set in the first line of the table 88° so if i set this line to 50% and the rest of the line to 100% i only ever get 50% duty cycle no matter what the coolant temp is. it is either off or 50% but it a put the AC on it will go to 100%.

    not sure what is going on here but i will investigate.

  12. #32
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    that's strange. When I tested, it was upto around 93c, and the fan was fast enough to cool down the water temp. OK, let wait for your test result.

    Quote Originally Posted by Davezj View Post
    i have been doing a bit of logging recently and i am having an issue with the fan duty cycle.

    my fans will only run at the speed that is set in the first line of the table 88° so if i set this line to 50% and the rest of the line to 100% i only ever get 50% duty cycle no matter what the coolant temp is. it is either off or 50% but it a put the AC on it will go to 100%.

    not sure what is going on here but i will investigate.

  13. #33
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    Radiator Fan Duty cycle map

    I will report back after I do do some proper testing.


    Sent from my space-aged gizmo

  14. #34
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    I have done extra testing and from what i can tell you need the first line of the table to be zero and 88 deg C then 90deg C 50% and 92deg C 100%.
    the reason for 88deg C value is set to zero is when the temp is outside the range of the table the ecu uses the last value in the table which is closest to the current value. e.g. if engine is cold and and 88deg C value is 50% then the fan will always be on at 50% until the temp gets higher than 88deg C. but if the lowest value is zero the fan will be off until the temp gets above 88deg C.

    well that is my finding.

  15. #35
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    really good news here guys now i can bring bring in my fan speeds a little earlier to combat all that heat....

  16. #36
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    88 (C) needs to be left at 0 so the fans dont come while temps are lower than that value.
    I am going to add 30% across the 3 columns form 90-107 (C).
    this should be just enough to help with cooling....!

  17. #37
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    another good option to get the heat out of the raditor and the intercooler is you can fit a couple of slimline fans to the back of the intercooler which can be activated from the existing radiator fans with the relay.
    and you can use some expanding gap filling foam tape to seal the radiator to the air con condenssor or the surrounding metalwork to ensure all the air being drawn through the radiator comes from outside the engine bay.

  18. #38
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    Quote Originally Posted by Davezj View Post
    I have done extra testing and from what i can tell you need the first line of the table to be zero and 88 deg C then 90deg C 50% and 92deg C 100%.
    the reason for 88deg C value is set to zero is when the temp is outside the range of the table the ecu uses the last value in the table which is closest to the current value. e.g. if engine is cold and and 88deg C value is 50% then the fan will always be on at 50% until the temp gets higher than 88deg C. but if the lowest value is zero the fan will be off until the temp gets above 88deg C.

    well that is my finding.
    That's great to know, as I could do with constant airflow over my chargecooler radiator in the Anglia, which is mounted in front of the coolant radiator

  19. #39
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    Revisiting this as I need to get my fans working at a lower temperature on the Anglia to help keep the chargecooler colder, and I thought it would be a nice simple change without having to do any wiring changes!

    I have a 7201 in the Anglia, and unfortunately the addresses are different than on the 7202/7203, so the following just gives a very wrong table!

    Code:
    	<table name="Thermo Fan Duty" category="Miscellaneous" address="124b0" type="3D" level="2" swapxy="true" scaling="Percent (128)">
    		<table name="Conditions" type="Static X Axis" elements="9">
    			<data>Main Fan 0-50kph</data>
    			<data>Main Fan 50-80kph</data>
    			<data>Main Fan 80->>kph</data>
    			<data>A/C Fan 0-50kph</data>
    			<data>A/C Fan 50-80kph</data>
    			<data>A/C Fan 80->>kph</data>
    			<data>Main+A/C 0-50kph</data>
    			<data>Main+A/C 50-80kph</data>
    			<data>Main+A/C 80->>kph</data>
    		</table>
    		<table name="Engine Temp" address="2d0d6" type="Y Axis" elements="12" scaling="Temp"/>
    	</table>
    7201.PNG

  20. #40
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    I am not sure if this is the case but i am just thinking out loud.

    iare the table addresses in both types of ECU in the same relative location to eachother, but the initial base address offset is different.
    so if you apply the different offset to the fan table address location do you get to the correct place.

    you could check this by looking a known table address in both types of ECU say the hi octane fuel map. what is the address in each type ecu and is the address relatively the same but offset by the difference in the base address.

    if you get what i mean. it is worth a look.

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