pat90 Posted February 24, 2019 Report Share Posted February 24, 2019 Somebody knows If The oem ecu of Toyota switches The engine fan with 12volt? I have a Link ecu but The link doesnt switch The engine fan. We changed The fan wire to another pin(injector6) in The connector en in The ecu changed settings but with no succes, If we put 12V in The pin The fans start running, I think we must couple a relay to iT to switch. I think iT a little strange for such expensive ecu that this not works Like oem? Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 24, 2019 Report Share Posted February 24, 2019 1 hour ago, pat90 said: I think iT a little strange for such expensive ecu that this not works Like oem? The fan on the ST205 is not even controlled by the ECU as far as I know? They normally just have a thermo switch in the radiator. So it should work exactly the same as OEM with the Link ECU. If you want to change your car so that the fan is controlled by the ECU, then you will need to change the relay wiring so that it can be triggered by a lowside (ground) signal. Quote Link to comment Share on other sites More sharing options...
pat90 Posted February 24, 2019 Author Report Share Posted February 24, 2019 Ok:) but in The ecu I can set al temps when they start running etc, is that only for expansion relays then? Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 24, 2019 Report Share Posted February 24, 2019 16 minutes ago, pat90 said: Ok:) but in The ecu I can set al temps when they start running etc, is that only for expansion relays then? Those settings are used by the ECU only if you have an aux output set to "engine fan" and that aux output is connected to the fan relay. Just like the ECU has settings for VVT, it does not mean all cars have ECU controlled camshafts. Quote Link to comment Share on other sites More sharing options...
pat90 Posted February 24, 2019 Author Report Share Posted February 24, 2019 5 minutes ago, Adamw said: Those settings are used by the ECU only if you have an aux output set to "engine fan" and that aux output is connected to the fan relay. Just like the ECU has settings for VVT, it does not mean all cars have ECU controlled camshafts. Allright:) The Aux output is 5volts, so I need a relay with 5v and 12v then? Quote Link to comment Share on other sites More sharing options...
ClintBHP Posted February 24, 2019 Report Share Posted February 24, 2019 4 minutes ago, pat90 said: Allright:) The Aux output is 5volts, so I need a relay with 5v and 12v then? Aux Output is Ground. Quote Link to comment Share on other sites More sharing options...
Adamw Posted February 24, 2019 Report Share Posted February 24, 2019 Quote Link to comment Share on other sites More sharing options...
pat90 Posted February 24, 2019 Author Report Share Posted February 24, 2019 Can be used with 12volt then, indient want to friet The ecu! Hahaha Quote Link to comment Share on other sites More sharing options...
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