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Is there any place that can modify a PCM for a 1995 XJ6?

XJ XJ6 / XJR6 ( X300 ) 1995-1997

Is there any place that can modify a PCM for a 1995 XJ6?

 
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Old 01-03-2019, 03:22 PM
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Default Is there any place that can modify a PCM for a 1995 XJ6?

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 '
 
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Old 01-03-2019, 05:06 PM
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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
 
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Old 01-03-2019, 06:13 PM
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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
 
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Old 01-03-2019, 06:22 PM
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Old 01-07-2019, 06:15 PM
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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?
 
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Old 01-07-2019, 07:07 PM
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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
 
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1998 Multiplex electrical.pdf (158.7 KB, 9 views)

Last edited by Lady Penelope; 01-07-2019 at 07:36 PM.
 
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