Trying to use the PCM from a 1997 in a 1995 and finding that the 1997 has circuits that the 1995 doesn't have and is setting codes for those systems - Specifically Canister close off and Fuel tank pressure pressure sensor circuits. Would like to have these circuits disabled. Thanks, Tom '

 

Welcome to the forum Tom,

I've moved your question from General Tech Help to X300 forum. Members here with the same model will be able to help.

Graham

 

The circuits can be simulated by placing a resistor in the path

Off the top of my head the 2 devices wire go into the eengine ECU

Do all the exterior lights work

Researching

 

See page 50 for a 97

http://www.jagrepair.com/images/Auto.../jagxj1997.pdf

 

Sorry, haven't gotten back yet, but we did think of that, but wouldn't the PCM be looking for a change on the FTP sensor?

 

Thinkin in progress

the ECU may monitor it's perimeters but the ECU and BPM talk to each other through a single wire digital data bus as the Orange wire on page 183 of the wiring guide

Where the flag comes from would be a guess for me

For the 95 :

http://www.jagrepair.com/images/Auto.../jagxj1995.pdf

This is the wire the OBD 2 reader is looking at I believe

There is a Jaguar training guide on my laptop somewhere on this data bus for the later X308 but can be extrapolated back for the X300

Ding :There is a bigger doc somewhere but the game is on