Mystery Blue Plug on my Caravan

I have been trying for months to figure out what this blue plug is for
on my 92 AWD Voyager. It's square and hangs down from behind the fuse
panel. It has 6 pins and goes somewhere. It appears previous occupants
had removed it from somewhere, but I cannot find where, nor am I able
to locate the plug in my wiring diagrams.

Anyone have any idea what this is for???

Many Thanks for your help.

 

It's a test port for hooking up a scanner.
Larry

 

=----

Its a diagnostic connector for the scan tool. It is used for body and ABS
testing

Glenn Beasley
Chrysler Tech

 

Interestingly enough, it is also used for emission testing, at least in
Maryland. Along with the external checks of the exhaust system and gas cap,
the emission testing tech hooks a scanner to the port and reads the codes,
if it doesn't pick up any driveability codes, you pass. No more treadmill
testing and sampling of exhaust for more recent cars.

 

Nope, not on a 92 Voyager.

The plug in question is for the CCD bus. i.e., ABS, body and
transmission controllers.

Which this isn't.

 

The only reason they hook it up for testing is to make sure that the
computer can be read for diagnostic codes. That is why you would fail
Emissions testing if there was a check engine light on. They circumvent the
people who remove the bulb for the CEL, by testing that the computer has no
codes stored. It has nothing to do with sampling exhaust!

 

Unfortunately you also fail people with vehicles that turn on the CEL every
once
in a while for what appears to be no reason. Ours does it and the code is
always
for the EGR. I've had the transducer apart and run through all the factory
diagnostics on
the EGR system at least a dozen times. And the van always passes emissions
dyno
testing with NoX well under the max allowable. I always cross my fingers
when going
through emissions, fortunately the CEL has never turned on in the testing
bay.

Ted

 

Thanks to Ted, I now know it's for testing the transmission
controller.

Thanks to Everyone for their Help!!