DPO2 - thermofan not switching

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DPO2 - thermofan not switching

Postby hughy85 » Sat Aug 26, 2017 3:15 pm

*PS500 ECU*

I am having trouble getting DPO2 to pull down to negative.

Have added a light on my ecu manager screen so I can see when the thermofan output is on/ off and that appears to be working fine.

However when I lower the on/ off temp's to trigger the light - which should also give -12v on DPO2 (pin 7) I get nothing.

Are there any other permissives? Does engine need to be running? Or one I get that light on the screen should I get -12v

Any other ideas what may be the issue of this ecu?


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Re: DPO2 - thermofan not switching

Postby HaltechMatthew » Mon Aug 28, 2017 12:43 pm

If the ECU says the output is on then it will be providing ground on that pin. Your relay has switched 12V+ on the other side of the trigger circuit?

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