Hello there’s LIN support mentioned in the documentation (and EMU comparisons) but I can’t find anything about this feature. I only see the “Bus speed” variable. e.g. I’d like to control my water pump with LIN (cwa400 Lin) since they dropped PWM support recenly. maybe I’m missing something or is…

Are there still plans for CWA support in the future? Lin-specific CWA400 pumps dropped fallback PWM support about a year ago, So In case something brakes users have to redo plumbing and brackets to accommodate PWM-specific version of CWA (and it’s not as easy to use) Also health and temperature L…

what a coincidence lol new version with support just within the hour I’ll be testing presently thanks

Did you test it and can you explain how this works?

If you mean CWA400, you just set speed target 0-100%. It is located in Outputs/Water pump.

Found it, I was on a 220.1 test version without the pump We powered a CWA400 pump and added a scope to check the LIN wire. Nothing going on. So not sure if is a PWM or a LIN pump. PWM pump supply stopped last year. Any suggestions how to check?

The LIN bus has a master-slave architecture. The pump is a slave, the ECU is a master. Without a master, there will be no communication happening. You just have to test it with the ECU.

and is the pump feedback available as a channel

It does work, with target speed as mentioned above I believe I just tried some random linbus version (2?) and speed in communication section and it started right up. Couldn’t find any channels for monitoring the pump

There is no feedback at this moment, perhaps we should add one to detect some communication problem at least. We haven’t add information about LIN settings in help yet. In Communication/LIN set: Bus speed: 19200 bps Version: LIN 2.0

It needs feedback to know for sure the pump is running or broken. Max current is to high to use one pmu channel so wiring it directly from the alternator. That is the great timing about running it with LIN bus .. so you have the feedback

LIN bus support

EMU PRO

Maciej.Ordowski_ECUMASTER November 4, 2025, 8:45am 16

Check out the new version of EMU PRO software 225.0. There’s been added the Current speed channel for CWA400 water pump.

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LIN bus support

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