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I just bought a 2001 dodge ram 2500 diesel, I can can

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I just bought a 2001...
I just bought a 2001 dodge ram 2500 diesel , I can can connect with the OBD scanner, but I took it to 2 different Ca. smog stations and they could not connect with their machine.
I have 12 VDC between pin 4 and 16 . Any ideas
Submitted: 10 months ago.Category: Dodge
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Answered in 3 hours by:
9/30/2017
Dodge Mechanic: Thomas Ragusa,
 replied 10 months ago
Thomas Ragusa
Category: Dodge
Satisfied Customers: 154
Experience: Automotive Technician at Town n Country Jeep
Verified

hello, my name is***** am a certified Dodge technician, I would like to help you out today. you have power at 16 and a good ground at 4, when you hook up a scan tool does the tool power on, if it does is there any communication between the scan tool and vehicle, I am assuming no since that is why your here, I can help you track down some wiring from the connector if you like to check the bus wires.

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Customer reply replied 10 months ago
Scan tool works reads codes etc but the California smog machine station can not connect to perform the ther test
Dodge Mechanic: Thomas Ragusa,
 replied 10 months ago

I will have to back out, I am in NY and am unfamilier with CA, inspection equipment, but if its like anything of ours, if the scantool can communicate then the test equipment should too, unless it utilizes other pins at the DLC, would you like me to give you a pin layout for your vehicles DLC and talk with a shop by you?

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Dodge Mechanic: sprinkles08, Chrysler/Dodge/Jeep master tech replied 10 months ago
sprinkles08
sprinkles08, Chrysler/Dodge/Jeep master tech
Category: Dodge
Satisfied Customers: 24,215
Experience: ASE Master and Advanced Certified, Chrysler/Dodge/Jeep Master Certified, Trans and Hybrid Specialist
Verified

Hello and welcome to JustAnswer!

There are a few things that could be going on. The issue may be with their equipment or you may have a problem on the truck. The module they're trying to communicate with could have an internal failure or there could be a wiring issue between the data link connector and that module. What specific wiring would depend on if their equipment is trying to communicate over SCI or PCI.

What module can they not communicate with?

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