MoTec M4, AUX 3 as PWM fan output

Discussion and support for MoTeC's earlier generation ECUs

MoTec M4, AUX 3 as PWM fan output

Postby LOLA-Christian on Sun May 09, 2021 10:50 pm

Hi all,
I am working on an old M4, where the plan is to use AUX 3 to control cooling fan (PWM),
Everything works fine when I am using "test output" (200Hz. from 10% to 90% (below 10 and above 95 it is "off")
But when I am in "normal mode" (with correct values in table etc...), and simulate changing ET (=X-axis) nothing happens, output AUX 3 is always =0.

Have I missed something.....?

EDIT (added screen-shots)
Aux Output 3.png
Aux Output 3
Aux Output 3.png (32.8 KiB) Viewed 1780 times

Aux Output 3 Test.png
Aux Output 3 Test
Aux Output 3 Test.png (29.02 KiB) Viewed 1780 times

Aux Output 3 Table.png
Aux Output 3 Table
Aux Output 3 Table.png (34.48 KiB) Viewed 1780 times
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Re: MoTec M4, AUX 3 as PWM fan output

Postby LOLA-Christian on Mon May 10, 2021 11:17 pm

Aux Output 3 Parameters.png
Aux Output 3 Parameters
Aux Output 3 Parameters.png (36.87 KiB) Viewed 1779 times

(only three attachment in one post.... :cry: )
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Re: MoTec M4, AUX 3 as PWM fan output

Postby SprinterTRD on Wed May 12, 2021 8:22 am

Basic question, I know, but how many ignition outputs are you using?
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Re: MoTec M4, AUX 3 as PWM fan output

Postby LOLA-Christian on Wed May 12, 2021 11:26 pm

SprinterTRD wrote:Basic question, I know, but how many ignition outputs are you using?


Two Ign Outputs (33 & 34)

***************************************************

Got information from Support, everything is OK - AUX 3 is only activated when system is "active" (= engine is running)
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