Discovery 2 CDL help

Hi I've plumed in the centre diff lock mechanism that was partially fitted to my truck when I bought it, I've changed the wires around so the diff lock light comes on now instead of the temperature warning light but when I engage it the traction control doesn't turn off.

It's a 2003 td5 manual

Can anyone shed any light on what might be the cause of this could be?? Thanks

@sierrafery I followed your instructions for the light wiring and thats worked a treat but I have the issue now could you shed any light on it for me please

Rnicholson90 said:

Hi I've plumed in the centre diff lock mechanism that was partially fitted to my truck when I bought it, I've changed the wires around so the diff lock light comes on now instead of the temperature warning light but when I engage it the traction control doesn't turn off.

It's a 2003 td5 manual

Can anyone shed any light on what might be the cause of this could be?? Thanks

Click to expand...

Hi, i dont really get what's the problem now explain again only the issue you have

So when you engage the centre diff lock isn't it supposed to de activate the traction control?

Because if that is the case mine doesn't. I put the diff lock on and the light comes up to say its engaged but no traction control lights come on.

No worries, as your's is facelift it has the upgraded SLABS ECU which can manage the TC to work together with the CDL, the TC is supposed to be disabled only on pre-facelits

Ahhh that makes sense as my mates is a pre face lift and his comes on so I assumed mine would do the same! Thanks so much for all your help!!!

here's the whole story from the wsm

I don't suppose you have any idea why my diagnostics won't communicate with the ecu? It connects to abs and all other modules just not the ecu

Rnicholson90 said:

I don't suppose you have any idea why my diagnostics won't communicate with the ecu? It connects to abs and all other modules just not the ecu

Click to expand...

can be two things, interrupted circuit or ECM issue as long as you have comms with other ECUs, you'll hav eto make a continuity test between ECM black plug pin 32(pink wire) and obd socket pin 7(also pink)

I'll test that when I'm back at work tomorrow as all my tools are there now! Thanks I'll keep you posted on what I find

sierrafery said:

can be two things, interrupted circuit or ECM issue as long as you have comms with other ECUs, you'll hav eto make a continuity test between ECM black plug pin 32(pink wire) and obd socket pin 7(also pink)

Click to expand...

Hi sorry its been so long only just got to check the wiring and I can confirm it's got continuity to both pins! So it's obviously something more serious??

Rnicholson90 said:

I can confirm it's got continuity to both pins!

Click to expand...

Then the problem is with the ECU

sierrafery said:

Then the problem is with the ECU

Click to expand...

So is that a new ecu then?? Or can it get repaired? The car runs fine and has no issues just want it so I can communicate with it! Apparently got a remap on it would that of caused any issues?

If it got remap means that it had comms cos being from 2003 the remap was made via OBD... i dont know what's the problem there