ECU with no VTCS control - default position open or closed ?

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05-05-2015, 01:37 AM

elior77

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ECU with no VTCS control - default position open or closed ?

Hey,

With a standalone ECU that does not control VTCS, do I need to do anything or is it open by default ?

Thanks

05-05-2015, 07:16 AM

Braineack

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pretty sure they are normally open, they close with vacuum when the solenoid is active.

05-08-2015, 12:17 PM

elior77

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On "MS3 Basic" the output for VCTS is configured to switch "on" when under 2300rpm and 60C.
Can I understand from this that it is normally open (not restrictive) ?

Thanks

05-08-2015, 12:53 PM

18psi

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thats exactly what he just said

05-08-2015, 01:37 PM

y8s

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What they said. It's a cold start aid to reduce emissions and stabilize cold idle. Warm car doesn't use it at all I dont believe.

05-08-2015, 01:39 PM

18psi

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correct. and you'll definitely feel it if you accidentally enabled it while driving because you'd lose 90% power

05-08-2015, 02:02 PM

concealer404

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And for the last time, your Haltech DOES control VTCS.

05-09-2015, 06:58 AM

elior77

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I know Haltech can control VTCS, but if the default position is open I can spare one output.
The patch loom does not utilize it, it needs to be modified for VTCS control.