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defender td5 diagnostics wont read


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hi to all i am new to forum but not new to this addictive brand of car i think i have owned all the earlier models from series 1 to range rovers anyway back to my problem i recently took my 02 plate defender td5 to a specialist who plugged into autologic to find that my car would not power up his machine he did not have much time to investigate (it was after dinner on christmas eve) the guy only works with land rovers so knows how to use his tool (excuse my language) does anyone have any ideas what may be the problem thanks James

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Thanks for that again if there is a live which there is to rear of plug where do the earths earth to as I am unsure what a header in a wiring diagram is I have rewired series motors before but never come across this term can I run two new earths I will test tomorrow morning to make sure the live is on said pin and thanks again for your helpful advice cheers James

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Hi again well i have the 2 earths but i dont have a live to pin 16 with ignition on i have a 12v feed to one of the other connector pins though i hate these dark nights cant get round to doing anything on your motor will have to look into this deeper at weekend i will test both sides of fuse 8 to see if i have a live at either and see if it is a bad connector in fuse box as after disturbing them i now have illumination to my electric window swithches at least i have sorted one problem thanks so far for your helpful advice James

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hello there, hope this might be of information, i recently borrowed a cheap blue point scanner from my snap-on dealer and tried it on my 2002 td5 defender and got no response from it, which i was expecting as the box said 2004 diesels onwards, so i gave it back to him, tried my mates snap-on scanner (about a grands worth) which required a special translator chip to be plugged in and i got pretty much all the info out of it i could ever need. Basically from what i know, early defenders dont have the normal Generic fault code output that later diesels are required to do for some european law so therefore a more specific scanner is required, i.e a nanocom/hawkeye or a decent scanner with the correct chip installed. I hope this can be of help. Oh and also, different scanners pickup different amounts of information, my mates snap-on one picked up only the engine e.c.u whereas the proper landrover equipment should pickup the engine, the immobiliser and whatever extras you have, be it traction and things like that. The snap-on scanner only showed a few sensors readings though, just the main basic ones, nothing like a full on landy scanner will show.

Ash

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hi again thanks for that ash but he does have the proper landy scanner but does anyone know what the term header means on a wiring diagram is it a plug/connection i dont have continuity from the fuse to diagnostic connector i am now stuck both fuses good but where does the purple wire from diagnostic connector go it goes under floor into loom then gone !!!!!!!!!! does anyone know if i can run a new wire and from where or is the header a problem ????

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The purple wire should run directly from the fuse to the diagnostic socket as per the diagram.

The headers referred to are connection blocks where a number of wires connect together, looks a bit like a connector plug but not plugged into anything. There are usually several different colours of wires in them and all the wires of the same colour would be connected together but insulated from the other colour "groups".

I seem to remember there is one tucked in with the passenger compartment fuse box (above the gearbox tunnel) and a couple more under the drivers seat where the ECU is, I'm not sure where "K109" is but it could be one of those next to the ECU.

I hope this helps.

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thanks for that again i have checked on defender 02 wiring diagram and its fuse i forgot now fuse 20 i think which is same as cd player now this is working it is after market so i will investigate to see where they have got live feed from as trying to trace where they all go once in loom is hard could i just run another wire to the plug thanks James

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Shouldn't really be a problem to just "double-up" on the wiring, it's only a permanent live feed and earth after all, so long as the feed is fused and ideally the earth should come from somewhere near the ECU rather than direct to the battery. (To avoid electrical noise issues.)

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  • 7 months later...

Thread resurrection. I am having problems connecting my evolution. I had to extend the obd wiring last year when i moved the Ecu and plug to the cubby box. I think i must have made a mistake in the dark when connecting. I get 12v continuous from pin 16 whether engine is on or off and then between 8 and 10 v at pin 7 when engine is running. Nothing from pin 8. Pin 4 and 5 have good earths. What readings should i get from pin 7 and 8 while engine off and then when in ignition 2 or engine running. I take it that pin 7 is the can link? Should this be showing a Voltage. At the moment the nancom displays nothing when plugged in. But from previous posts it should with 12v at pin 16 and earths at pins 4 and 5. Is there something else it requires?

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  • 1 year later...

Anyone able to shed some light. I forgot about this issue until recently when i wanted to plug the nanocon in to make adjustments. My previous statement of constant 12v a pin 16 may not now be true, i think i may have a wiring issue due to dropping volts from fuse 8 to pin 16. I did not realise when this fuse is removed, the engine is imobilised.... Before running a fresh live feed to pin 16 can someone confirm what if any voltage readings i should be getting at pin 7 & 8??

Sharpie

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  • 2 weeks later...

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