95 850 NA - using the OBD II ELM327 Reader

[matthew1]

Nedro, let's "fork" this discussion by creating a new topic in the Tools forum. I want to keep topics on track.

You may simply copy and paste your post into a new topic.

[Ozark Lee]

There is no A-6 for the Motronic system, it only applies to the Jetronic LH 3.2 system. The LH 3.2 used two ECUs, one for the ignition and one for the fuel. The Motronic system combined both systems on one ECU which is read form port A-2.

Be careful with OBD-I codes to make sure you are using the appropriate "decoder ring". The port A-2 codes for the LH 3.2 are different than the Motronic codes from the same port.

...Lee

[nedro018]

matt: sorry ill end my post.

lee: "Be careful with OBD-I codes to make sure you are using the appropriate "decoder ring". The port A-2 codes for the LH 3.2 are different than the Motronic codes from the same port"

what does this mean "appropriate decoder ring"? is it the diameter of the DTC pin?..you can send PM to me thx.

[Ozark Lee]

The "decoder ring" isn't a literal device, it was more of a literary device. It was just a way of saying to make sure that you are looking up the correct codes for your ECU. Most of the pre '96 cars had a LH 3.2 for the NA versions and the Motronic for the turbos. If you are using the factory manual that we host here then you would want to use the "tests with codes - turbo" file to get the correct code definitions from port A-2. The same thing applies to the Haynes manual.

...Lee