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no, it's just a relay and they don't care about polarity.
cheers
AJ Hunter
Graphic Designer
06 370 3660
027 201 9738
________________________________
From: Suzy W <suprra@gmail.com>
To: Supra Club of NZ Mailing List <sconz@list.supras.org.nz>
Sent: Wednesday, 28 August 2013 8:36 AM
Subject: Re: [sconz] MK 3 Supra 7M-GTE heater VSV valve - Suzy
Hey aj, quick question, I picked up a good vsv, does polarity matter
for it? New one has blue wire & y/l. I'm guessing y/l to gauge wire &
blue to black.
Cheers :)
On 8/15/13, aj hunter <ajh_nz@yahoo.com> wrote:
> Hi Suzy,
>
> Like you, I HAVE to know how stuff works. I think I know the Supra heater
> and its idiosyncrasies off by heart now!
>
> The percentage of heated air that actually gets blown inside the car is
> decided by the elaborate assembly of flaps under the dash, which either mix
> hot air from the heater radiator with ambient air, or bypass it and just
> suck in outside air, or chilled air from the A/C.
>
> During normal operation the hot water valve operates (if the VSV is working)
> as soon as the engine starts, unless and only if the temperature slider is
> set to its absolute minimum setting and all the control switches are set to
> "auto."
>
> All that you lose by bypassing the VSV is this feature.
>
> Also:
> Even at its "off" setting the hot water valve is designed to let a small
> amount of hot water run through the heater radiator. I'm not sure why Toyota
> had it do this. Possibly to prevent vapour locks over the summer?
>
>
> Cheers
>
>
> AJ Hunter
> Graphic Designer
>
> 06 370 3660
>
> 027 201 9738
>
>
>
>
> ________________________________
> From: Suzy W <suprra@gmail.com>
> To: Supra Club of NZ Mailing List <sconz@list.supras.org.nz>
> Sent: Thursday, 15 August 2013 4:35 PM
> Subject: Re: [sconz] MK 3 Supra 7M-GTE heater VSV valve - Suzy
>
>
>
> ok cool, that's what I thought, however, why is it that I haven't changed
> the vacuum, it's still on intake manifold, yet when I go to cold... it's
> cold :s well, as cold as air can get with no a/c heh.
>
> I need to think about how it works some more I think lol (it's my worst
> enemy but best friend, "having" to know how stuff works" :D)
>
>
>
> On Thu, Aug 15, 2013 at 4:06 PM, aj hunter <ajh_nz@yahoo.com> wrote:
>
> Hi Suzy,
>>
>>Yes, I read about the VSV bypass mod you described.
>>
>>The VSV is a solenoid switch that opens and closes the vacuum connection
>> between the intake manifold and vacuum operated plunger immediately above
>> the VSV.
>>
>>This plunger has a lever attached to one end, and this lever is what
>> operates the hot water valve.
>>
>>Using battery juice to run the lever directly would require too much power
>> and torque and electronics, so the climate control uses engine vacuum
>> instead.
>>
>>
>>
>>
>>
>>AJ Hunter
>>Graphic Designer
>>
>>06 370 3660
>>
>>027 201 9738
>>
>>
>>
>>
>>________________________________
>> From: Suzy W <suprra@gmail.com>
>>To: Supra Club of NZ Mailing List <sconz@list.supras.org.nz>
>>Sent: Thursday, 15 August 2013 2:39 PM
>>
>>Subject: Re: [sconz] MK 3 Supra 7M-GTE heater VSV valve - Suzy
>>
>>
>>
>>awesomeness! Dunno what the state of my one is thats currently on my car
>> but my hot cold works perfectly since I resoldered the heater unit. I
>> thought it was the valve faulty on my last heater unit because I couldn't
>> get heat, I swapped the vacuum to intake manifold permanently and got
>> heat. Resoldered a board and tested in my car and with nothing changed I
>> now get hot and cold :o So it turned out my heater unit was faulty and not
>> the valve heh.
>>
>>
>>The vsv, does that open the valve also for hot cold?
>>
>>
>>
>>On Thu, Aug 15, 2013 at 2:15 PM, aj hunter <ajh_nz@yahoo.com> wrote:
>>
>>Thanks Suzy, but that's EXACTLY what mine was doing.
>>>
>>>I think there is a minutely small break in the solenoid coil wire and
>>> that's how it reads open circuit. Then you put power on it, vibrate it,
>>> move it around, heat it with your fingers, etc, and then sometimes it
>>> works again and sometimes it doesn't.
>>>
>>>It should read a rock steady 25 - 40 ohms.
>>>
>>>
>>>
>>> The local Toyota parts department said it's a $300 import and a a long
>>> wait for a new one from Japan.
>>>
>>>
>>> $300 for something
> which is pretty much just the back end end of a stereo tweeter speaker with
> a plunger and 2 plastic pipe connectors?
>>>
>>> No way, Toyota, you suck.
>>>
>>> Major props then to AA Partsworld here on Dixon St. They didn't know me
>>> from a bar of soap and yet then lent me 4 likely looking substitutes to
>>> take home and try out. Sure enough the exact same valve with a different
>>> part number (because it has a different power connector and no blanked
>>> off unused outlet) off a 1990 Cynos is a perfect fit, for $15 bucks.
>>>
>>>
>>>Result!!
>>>
>>>
>>>Cheers
>>>
>>>
>>>
>>>
>>>AJ Hunter
>>>Graphic Designer
>>>
>>>06 370 3660
>>>
>>>027 201 9738
>>>
>>>
>>>
>>>
>>>________________________________
>>> From: Suzy W <suprra@gmail.com>
>>>To: Supra Club of NZ Mailing List <sconz@list.supras.org.nz>
>>>Sent: Wednesday, 14 August 2013 3:16 PM
>>>Subject: Re: [sconz] MK 3 Supra 7M-GTE heater VSV valve - Suzy
>>>
>>>
>>>
>>>Well we dug it out, I measured it with multimeter with various ranges and
>>> nothing :/
>>>Chucked it on a battery and it energises fine so I guess it's fine?
>>>
>>>
>>>All yours if you want it :)
>>>
>>>
>>>
>>>On Wed, Aug 14, 2013 at 1:24 PM, aj hunter <ajh_nz@yahoo.com> wrote:
>>>
>>>Hi Suzy,
>>>>
>>>>Any luck with this? (see below)
>>>>
>>>>
>>>>AJ Hunter
>>>>Graphic Designer
>>>>
>>>>06 370 3660
>>>>
>>>>027 201 9738
>>>>
>>>>
>>>>
>>>>
>>>>________________________________
>>>> From: Suzy W <suprra@gmail.com>
>>>>To: Supra Club of NZ Mailing List <sconz@list.supras.org.nz>
>>>>Sent: Monday, 12 August 2013 8:05 PM
>>>>Subject: Re: [sconz] MK 3 Supra 7M-GTE heater VSV valve dead.
>>>>
>>>>
>>>>
>>>>mk3 supra :p
>>>>Alrightey well I can dig it out tomorrow and test it for ya :)
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>On Mon, Aug 12, 2013 at 6:22 PM, aj hunter <ajh_nz@yahoo.com> wrote:
>>>>
>>>>This looks like it.
>>>>>
>>>>> http://www.rclambert.com/supra/mk3vsv7.jpg
>>>>>
>>>>>
>>>>>
>>>>>AJ Hunter
>>>>>Graphic Designer
>>>>>
>>>>>06 370 3660
>>>>>
>>>>>027 201 9738
>>>>>
>>>>>
>>>>>
>>>>>
>>>>>________________________________
>>>>> From: Suzy W <suprra@gmail.com>
>>>>>To: Supra Club of NZ Mailing List <sconz@list.supras.org.nz>
>>>>>Sent: Monday, 12 August 2013 6:10 PM
>>>>>Subject: Re: [sconz] MK 3 Supra 7M-GTE heater VSV valve dead.
>>>>>
>>>>>
>>>>>
>>>>>I found a heater valve unit in a box the other day in our garage, I can
>>>>> dig it out if ya want, not sure if it works but better than 300 :p
>>>>>
>>>>>
>>>>>
>>>>>On Mon, Aug 12, 2013 at 6:08 PM, aj hunter <ajh_nz@yahoo.com> wrote:
>>>>>
>>>>>Thanks Suzy,
>>>>>>
>>>>>>Regardless of what it's fitted to the part has about the same price....
>>>>>> about $300!
>>>>>>
>>>>>>
>>>>>>There has to be a cheaper solution.
>>>>>>
>>>>>>
>>>>>>Hmmmm...
>>>>>>
>>>>>>
>>>>>>AJ Hunter
>>>>>>Graphic Designer
>>>>>>
>>>>>>06 370 3660
>>>>>>
>>>>>>027 201 9738
>>>>>>
>>>>>>
>>>>>>
>>>>
>>>>
>>>>---
> Supra Club of New Zealand - http://www.supras.org.nz/ Website sponsored by
> Alltech Diesel & Turbocharger http://www.turbo.co.nz
>>>
>>>
>>>
>>>--
>>>Cheers
>>>
>>>Suze
>>>7M POWAH! ;)
>>>www.supra.co.nz
>>>---
> Supra Club of New Zealand - http://www.supras.org.nz/ Website sponsored by
> Alltech Diesel & Turbocharger http://www.turbo.co.nz
>>>
>>>
>>>
>>>
>>>---
> Supra Club of New Zealand - http://www.supras.org.nz/ Website sponsored by
> Alltech Diesel & Turbocharger http://www.turbo.co.nz
>>
>>
>>
>>--
>>Cheers
>>
>>Suze
>>7M POWAH! ;)
>>www.supra.co.nz
>>---
> Supra Club of New Zealand - http://www.supras.org.nz/ Website sponsored by
> Alltech Diesel & Turbocharger http://www.turbo.co.nz
>>
>>
>>
>>
>>---
> Supra Club of New Zealand - http://www.supras.org.nz/ Website sponsored by
> Alltech Diesel & Turbocharger http://www.turbo.co.nz
>
>
> --
> Cheers
>
> Suze
> 7M POWAH! ;)
> www.supra.co.nz
> ---
> Supra Club of New Zealand - http://www.supras.org.nz/
> Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz
> ---
> Supra Club of New Zealand - http://www.supras.org.nz/
> Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz
--
Cheers
Suze
7M POWAH! ;)
www.supra.co.nz
---
Supra Club of New Zealand - http://www.supras.org.nz/
Website sponsored by Alltech Diesel & Turbocharger http://www.turbo.co.nz
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