Charge cooler water pump control

[Escy]

Can anyone help me with a strategy to control a charge cooler pump? The pump has a power and ground feed and a PWM input. I have a standalone controller for it but would like to run it from the ECU if possible. My controller controls the pump based on temperature and also can trigger electric fans, can I do this with the ECU?

[Kisielisodd]

Yes, You can create your own strategies using parametric outputs with various conditions.
You can control pump and fan using different parameters like RPM, CLT, IAT, TPS itp

[Escy]

Is there a way of controlling the pump speed also (via the PWM input on the pump)? Ideally i'd like it ticking over at 50% speed to avoid heat soak. The parametric output looks like it'll just control a relay, there is a PWM output but there are no options for how to control it.

[Karel]

there is a way to use PWM youtput depending on water temp, but how much current does need you pump ?

[Escy]

The pump is powered by a separate relay which is triggered when the ignition is on. My pump has 3 pins, power earth and a pwm input.

[Karel]

Outputs - PWM #1 and PWM #1 table

[nickbmw]

Outputs - PWM #1 and PWM #1 table

This would be ideal if the developers added another sensor table, chargecooler water temp, and let us use that temp readings as x axxis on the pwm table.

[Escy]

It's only got the option of using the clt sensor on the pwm table. Should I use my charge cooler temp sensor as the engine clt input and use the actual engine clt sensor on an aux input?

[ren]

It's only got the option of using the clt sensor on the pwm table. Should I use my charge cooler temp sensor as the engine clt input and use the actual engine clt sensor on an aux input?

No, you want CLT to be your engine coolant temperature only, particularly for fuel & starting compensations.

Here's a work around.

Connect an AUX output to your PWM pin, set up the table to be 50% at all times.

Then connect another AUX output to your pump relay, to turn it on, and setup a parametric output, based on another Analog in channel (will need a pullup to 5v).

So the pump always gets a 50% duty, regardless, but the second output turns it on.

Thinking about it, you would have to use 2 outputs anyway.

[Escy]

Thanks for your reply. I'll be honest, it's getting confusing, think I might just fit the after market pump controller I have.

[Escy]

I've changed my mind about using my standalone charge cooler controller, I want to run it from the ECU so I can keep data log it.

I want to run through what I want to do incase i've misunderstood something.

I'll forget about running the pump from the charge cooler temperature sensor. I'll wire that sensor up to the ecu and just log what's happening.

Looking at the PWM #1 table, I can set it to run a base speed low down and kick in under boost. I just need to wire up from the PWM output to the PWM input on the pump, do I have to add a flyback diode?

I've been reading how the pump i'm using works and it's confusing things a little.

http://webpages.charter.net/n8nxf/EVTV% ... 20Pump.pdf

[Jan32]

There is no flyback diode needed because it is only a control signal and you dont control high currents.