Data link connector - brown and pink/red wires

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mcapinha

mcapinha

Active Member
Posts
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Location
Portugal
Hi all.

By accident, I discovered that someone had connected together the Brown and Pink/Red wires of the Data Link Connector, using a resistor. After reading through the ETM, it seems that the Brown wire is a +12V fused feed, straight from the fuse box and that the Pink/Red wire is the K diagnostics line that goes into other ECUs like HEVAC/ABS/ECM.

I have no idea why someone would do this but the presence of the resistor indicates me that it was, at least, someone with a clue about the electrics in these.

Everything seems to be working just fine (apart from cruise control but that's an old problem).

Can someone shed some light on this ?


1000 word speaking picture:
33bodqa.jpg
 
mcapinha said:
Hi all.

By accident, I discovered that someone had connected together the Brown and Pink/Red wires of the Data Link Connector, using a resistor. After reading through the ETM, it seems that the Brown wire is a +12V fused feed, straight from the fuse box and that the Pink/Red wire is the K diagnostics line that goes into other ECUs like HEVAC/ABS/ECM.

I have no idea why someone would do this but the presence of the resistor indicates me that it was, at least, someone with a clue about the electrics in these.

Everything seems to be working just fine (apart from cruise control but that's an old problem).

Can someone shed some light on this ?


1000 word speaking picture:
33bodqa.jpg
Click to expand...
I have a vague recollection that this was an official mod.:eek:
 
STC3182 resistor kit was fitted to early diesels vehicles to prevent battery drain by ensuring BECM closed down properly. See service bulletin NRR/86/14/95/EN. Dated 04/10/95.
 
Last edited:
You Sirs, are a wealth of information :)

According to the bulletin (that SaintV8 had uploaded to another thread on this same subject, which google failed to find for me previously) mine shouldn't have been affected by that battery drain, as it's a later model. Probably someone had battery drain problems and a LR mechanic tried this as a fix.

Does anyone have any pointers on where to find all of these service bulletins ? My copy of RAVE doesn't have them :/
 
mcapinha said:
You Sirs, are a wealth of information :)

According to the bulletin (that SaintV8 had uploaded to another thread on this same subject, which google failed to find for me previously) mine shouldn't have been affected by that battery drain, as it's a later model. Probably someone had battery drain problems and a LR mechanic tried this as a fix.

Does anyone have any pointers on where to find all of these service bulletins ? My copy of RAVE doesn't have them :/
Click to expand...

Down load RAVE from the link in my EAS "How to". That has them. As far as i am aware only applies to 1995 diesel models.
 
wammers said:
Road speed is fed into the Hevac ECU. But don't ask which wire it is can't find it on schematics. It will be one of the feeds from the BECM no doubt, but which one i don't know.
Click to expand...


I can find that wire but if I connect to it the sat nav does not read the speed sensor
 
Sat nav is a black art to me. The only wire i can see on sat nav schematics that is common to Hevac and sat nav computer is a yellow wire from pin 10 on BECM to pin 10 on sat nav computer. Spliced off to radio and Hevac. That has to be the speed signal i would have thought. But that is only if you have a Land rover sat nav fitted.
 
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