Not every thing is basic.
How would you have found this fault with a multi meter?

http://forums.pelicanparts.com/uploa...1467386511.jpg

What does this do?

Thank you all !!!!
 

^^^^^ Thanks for Pointing that out Rick ^^^^^

And THANK YOU to everyone who took the time to sit at their keyboards and offer suggestions and wisdom. Alex and Ingo a special thanks.

I am able to own and maintain my car solely because of the resources that this board offers. Unfortunately I am decidedly unable to maintain my car with a checkbook nor would I get near the satisfaction these little machines give me.

Have a GREAT 4th everyone, I'm gonna go stare at my car :cool:

Scott

Actually, your diagram is incorrect, i.e. the shield is not connected to the pickup end but is
the third pin at the junction point in the engine compartment. It is then connected to pin 5 of the ECM.

So a simple ohms test (that good techs do) between all the pins would find a short between the
shield and one of the other pins.

If your diagram were correct, but it's not, a good tech would test all the pins for continuity
to the body of the pickup unit (or engine case) and a short would be found with a VOM.

A simple method to test for ref & speed signals (if the LED is biased properly), but not as informative
as when using a VOM on ACV.

I thought it was a cool drawing and that I represented that. The vertical lines represent connectors.

The point is I've never seen a "simple" troubleshooting step that says "Remove the DME connector and check for isolation between Pin 5 and the 4 signal wires on the harness
http://forums.pelicanparts.com/uploa...1467393474.jpg

http://forums.pelicanparts.com/uploa...1467393725.jpg

http://forums.pelicanparts.com/uploa...1467394108.jpg
^^^^^
The same procedure can be used to test the reference sensor.

Gerry

So you thought it was a "cool drawing" to mis-represent the correct diagram and mis-lead the OP, right? By the way, the last diagram (lower of the two) is still incorrect, i.e. the shield "floats" at the
sensor end. That's the proper way to implement a shield, e.g. the O2 sensor. Get the Porsche 911
3.2 shop manual.

Oh, so common logic wouldn't indicate to a troubleshooter that if one were potentially having
a problem with the sensors, one wouldn't use a VOM to check for shorts in the sensor cables? Please!

When troubleshooting a very simple EFI system as used on the 911 3.2, a basic VOM is more
than adequate. Now if one were troubleshooting 2012 Cayenne with Direct Injection and injector
number four wasn't pulsing, you most likely would use an O-scope once you opened the DME ECM
to probe the gate of that injector driver.

Sorry he provided your thread mis-information, i.e. the incorrect diagram for the sensors.

and if one would be a stand-up guy one wouldn't hide behind a stupid synonym but post under his real name Loren. And one also wouldn't just spew negativity but be cordial, respectful and coaching others. Do yourself a favor and google "soft skills ".....

:)


Some really great information here in this thread, all bundled up in one spot. Thanks for the lesson, guys.

I was trying to convey that even though Loren "COUGH" Dave could have isolated the problem in 10 minutes, you got very lucky to find a mechanic that did not just throw up his hands and had Ingo to keep you from going off on a DME tangent.

THANKS so much for making this statement!!!

Is DAVE his middle name? :p:p:D:D