Date:         Mon, 30 Apr 2001 21:31:48 -0500
Reply-To:     jason_yasment@hushmail.com
Sender:       Vanagon Mailing List <vanagon@gerry.vanagon.com>
From:         Jason Yasment <jason_yasment@hushmail.com>
Subject:      Re: Temp II voltages
Content-type: multipart/mixed;

And if I remember correctly, David drives an '84 Digijet and Darrell later
model Digifants.  Two different systems with possibly differing specs of
which I am learning in more detail everyday.

Jason

At Mon, 30 Apr 2001 19:40:25 -0400, Helen Fahy <72510.1173@compuserve.com>
wrote:

>
>Thanks for replying Ed.
>
>I have a cheap RS analog meter as my Digitool meter output.  I am going
>to
>use my Fluke as a check tomorrow.
>
>Yes the blue water sensor on the thermostat housing is the one I am
>referring to.
>
>I believe that I have seen David Beierl refer to the 0.1 to 0.2 as normal
>for his Temp II sensor.  But Darrell Boehler mentioned 0.3 to 0.4 volts.
>
>I would like to know if the engine management software distinguishes
>between
>the 2 different ranges.
>
>Thanks again.
>
>Joe Fahy
>
>
>----- Original Message -----
>From: "Ed DeBolt" <eddebolt@netzero.com>
>To: "Helen Fahy" <72510.1173@compuserve.com>
>Sent: Monday, April 30, 2001 7:25 PM
>Subject: Re: Temp II voltages
>
>
>>
>> Hmm. I wonder if your readout is sensitive enough. with a digitool
>my temp
>2
>> operating range is typically . 14 to .18 volts. my fan comes on at
>.12
>> volts.  when I first start my vehicle in the morning I read 1.25 volts
>and
>> as it warms up then it decreases. I typically idle it until I get
>to .6 or
>> .7 before actually driving.
>>
>> we are talking about the same sensor. the blue water temp sensor in
>the
>> flange by the thermostat.
>>
>> my van an 87 2.1 will show a 02 sensor reading increase up to about
>.6 or
>.7
>> before it starts oscillating. when it starts to cycle .2 or .3 to
>.6 or .7
>> then I figure it is in closed loop.
>>
>> ed
>> -----Original Message-----
>> From: Helen Fahy <72510.1173@compuserve.com>
>> To: vanagon@GERRY.VANAGON.COM <vanagon@GERRY.VANAGON.COM>
>> Date: Monday, April 30, 2001 4:21 PM
>> Subject: Temp II voltages
>>
>>
>> >I made an ersatz version of Darrell Boehler's Digitool.  Darrell
>was
>> >charging $100 as of a few weeks ago.  This is so cheap!  His tool
>should
>be
>> >more like $2-300 for all the work it takes!  Do not forget that after
>you
>> >build it you still have to recheck your work prior to powering up
>the
>> >system.  I will not divulge how long I took to make my version!
>If I had
>> to
>> >do it over again, I would not.  I would ask Darrell verrrrry nicely
>if he
>> >would sell me one, Please!!!
>> >
>> >Now the question part .
>> >
>> >The archives have listed 2 different acceptable ranges for the Temp
>II
>> >sensor voltage at normal operating temperature.  The first was 0.1
>to 0.2
>> >volts and the second range was 0.3 to 0.4 volts.  Not very much
>difference.
>> >
>> >My Temp II is rock steady at 0.4 volts, with an indicated temperature
>1
>> >needle blade width below the LED,  and I can see the O2 sensor voltage
>> >oscillating about 0.6 volts.
>> >
>> >Are these two conditions sufficient to say that the ecu is in closed
>loop
>> >operation and that the engine is at normal operating temperature?
>> >
>> >I believe that the system is in closed loop operation, but I am not
>sure
>at
>> >what Temp II voltage the engine management software understands that
>the
>> >engine is at normal operating temperature.
>> >
>> >Any discussion welcomed.
>> >
>> >Thanks,
>> >Joe Fahy
>> >
>>
>
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