[T3] Air Pressure Sensor

[Tim Keohane]

Jim the units will go tomorrow. I tested them last night. 2 Sensors, one marked "Good" the other marked "Leaks" 
The "Good" one had readings of: 
outer pins 889 ohms (pins 15 & 7) Inner pins 341 ohms pins 10 & 8
The "leaks" one:
outer pins (15 & 7) 876 ohms Inner pins (10 & 8) 329 ohms..
I can't speak to the ultimate accuracy of the meter but I'm sure it's darn close.
Any way they will go tomorrow. You can send me a cheque when they arrive so you will have a return path.
Happy Thanksgiving
Tim
On Nov 22, 2014, at 1:17 PM, Jim Adney wrote:

> On 22 Nov 2014 at 9:17, Tim Keohane wrote:
> 
>> I finally got the correct air pressure sensor, ( actually I got 2 )
>> and found one has only the Bosch # 0 0280 100 116, while the other has
>> both the Bosch and VW ( 311 906 051E ) #'s. Both hold a vacuum ( I
>> have a spare ) and the one with both #'s was installed last night.I
>> will test drive it today. 
> 
> They should both be perfectly fine for your '73. All of them will 
> have the Bosch number, but only those that came thru the VW network 
> will also have the VW number.
> 
>> Is there a test for the circuitry in the unit? If so what is the procedure?
> 
> Measure resistance between the 2 outer terminals and between the 2 
> inner terminals. One of those should read ~300 Ohms and the other 
> should be ~90 Ohms. Resistance between any pin and the housing should 
> be infinity (OL on a Fluke.)
> 
>> I have 2 "C" units I will move on. One holds vacuum, the other
>> develops a vacuum but bleeds it down at 1" hg per second or close to
>> that time. If any interest let me know, or I will list on the samba. 
> 
> I'm potentially interested, depending on the price. PM me.
> 
> -- 
> *******************************
> Jim Adney, jadney at vwtype3.org
> Madison, Wisconsin, USA
> *******************************
> 
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