Parameter / Register: Radiator – Fan Speed / Mode: Why only OFF/ON not OFF/LOW/HI?

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karlos23
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Joined: 04 Sep 2022, 20:31

Parameter / Register: Radiator – Fan Speed / Mode: Why only OFF/ON not OFF/LOW/HI?

Post by karlos23 »

Micra K12, 2003, gasoline | NDSII Lite v1.53 (Android)

Parameter / Register: Radiator – Fan Speed / Mode: Why only OFF/ON not OFF/LOW/HI?
Because, from what I know (via “Facory Service Manual”) and I experienced, ECU is serving OFF, LOW and HI 😊
?

Regards.
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Last edited by karlos23 on 29 Nov 2022, 01:21, edited 2 times in total.
Tom
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Re: Parameter / Register: Radiator – Fan Speed / Mode: Why only OFF/ON not OFF/LOW/HIGH?

Post by Tom »

ON = LOW or HI
karlos23
Posts: 4
Joined: 04 Sep 2022, 20:31

Re: Parameter / Register: Radiator – Fan Speed / Mode: Why only OFF/ON not OFF/LOW/HIGH?

Post by karlos23 »

:D I know.

But why not LOW or HI? :) Sometimes during diagnostics (for example A/C) we want to know which specific speed has been activated and when ;)
Tom
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Re: Parameter / Register: Radiator – Fan Speed / Mode: Why only OFF/ON not OFF/LOW/HI?

Post by Tom »

Really? Why?
karlos23
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Joined: 04 Sep 2022, 20:31

Re: Parameter / Register: Radiator – Fan Speed / Mode: Why only OFF/ON not OFF/LOW/HI?

Post by karlos23 »

Are you Really asking? ;)
For example, because diagnostics consists in checking (using the interface and software) whether the status of devices and parts behaves in accordance with a certain logic ;)
An example of logic (chart; cooling fans speed depending on...) is attached (source: google).
Kindly regards.
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fan speed logic - example.JPG
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Tom
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Re: Parameter / Register: Radiator – Fan Speed / Mode: Why only OFF/ON not OFF/LOW/HI?

Post by Tom »

Are you trying to verify if the radiator logic hardcoded in the ecu is correct? Or if your radiator fans are working?

BTW. The NDSI ver 1.54 Android app and Windows PC version 2.56 software have a register called Radiator Fan Hi.
karlos23
Posts: 4
Joined: 04 Sep 2022, 20:31

Re: Parameter / Register: Radiator – Fan Speed / Mode: Why only OFF/ON not OFF/LOW/HI?

Post by karlos23 »

The latter of course.
Something may be broken with the fan, radiator itself or with the wiring.
For example, you see (via App) that the ECU has switched the fan to HI speed, and the radiator is still on low / first speed, or it is not spinning at all.
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