P38a EAS rechip saga

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Nigel Hewitt - 29 Oct 2006 23:23 GMT

I'm getting on with my little project to make my EAS work by replacing the
computer (after two and a half years of the dealer phoning Land Rover for
help) and it's beginning to work quite well but, before I drag the logic
analyser out to the car, I though I'd ask if anybody knows what runs on the
leads to the BECM? I pulled an up/down switch apart and I can drive that
but there is clearly more as I get some lovely error messages and lots of
beeps.

nigelH

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AndyC the WB - 30 Oct 2006 09:27 GMT

>>>>> "Nigel" == Nigel Hewitt <nigelhewitt@REMOVEhotmail.co.uk> writes:

Nigel> to work quite well but, before I drag the logic analyser
Nigel> out to the car, I though I'd ask if anybody knows what runs
Nigel> on the leads to the BECM? I pulled an up/down switch apart
Nigel> and I can drive that but there is clearly more as I get
Nigel> some lovely error messages and lots of beeps.

There's nothing exotic in the signalling. It's just +12V or earth
path switching of various leads. There's a pinout diagram on my
website (www.p38a.co.uk) and the rest of the information should be in
the Electrical Troubleshooting manual.

Andy

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Andy Cunningham -- www.cunningham.me.uk
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Nigel Hewitt - 30 Oct 2006 14:13 GMT

>>>>>> "Nigel" == Nigel Hewitt <nigelhewitt@REMOVEhotmail.co.uk> writes:
>
[quoted text clipped - 8 lines]
> website (www.p38a.co.uk) and the rest of the information should be in
> the Electrical Troubleshooting manual.

I'm talking about Lamp Control clock and data, ECU pins 7+25. It's
a pulse train and the last 4 bits control the lights on the up/down
switch. I may just have to take mine back to the LR agent and get it
reset again but the new version is now controlling things so I'm
loath to thow any more money at them for a fault they can't fix.
However the BECM isn't quite happy yet.

Interesting site. I wish I'd found it earlier.

nigelH

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