TD5 Problem

Paul Wootton · Nov 9, 2018

I have a 2000 Disco TD5 which has run well until last week when it developed a misfire over 3000rpm,
it would still run OK until I had to move it to let a truck into our yard.Came back out later and it would not start so contacted a friend with a Nano to find the fault and no activation of the Nano.
I am familiar with the inlector harness and oil in the ecu but ecu is clear,any ideas re the nano.
Paul

neilly · Nov 9, 2018

Are you saying the nanocom would not connect to the car?

Cheers

Paul Wootton · Nov 9, 2018

neilly said:
Are you saying the nanocom would not connect to the car?

Cheers

Yes exactly,no light up at all

neilly · Nov 9, 2018

Did you check the fuse?

Cheers

Paul Wootton · Nov 9, 2018

neilly said:
Did you check the fuse?

Cheers

Yes I have checked every fuse on the vehicle and can find no proplems and the nano works fine on another td5.as a point which fuse is most likely to give this problem as I will try replacing it

neilly · Nov 9, 2018

iirc it is fuse 20.

But things are getting blurry..

Cheers

Paul Wootton · Nov 9, 2018

neilly said:
iirc it is fuse 20.

But things are getting blurry..

Cheers

Yes that was the one I changed to be on the safe side,I am starting to wonder if the ecu is faulty

neilly · Nov 9, 2018

Well,

if it is wiring and cabling you want to play with then @sierrafery is you best bet.

Cheers

jamesmartin · Nov 9, 2018

are you sure battery and earth lea etc are good

Paul Wootton · Nov 9, 2018

neilly said:
Well,

if it is wiring and cabling you want to play with then @sierrafery is you best bet.

Cheers

Thanks very much for your help.
Paul

Paul Wootton · Nov 9, 2018

jamesmartin said:
are you sure battery and earth lea etc are good

Paul Wootton said:
Thanks very much for your help.
Paul

Yes new battery and leads are clean and tight

sierrafery · Nov 10, 2018

Check fusible link FL3

raywin · Nov 10, 2018

Does the yellow light for the heater plugs come on when you turn on the ignition?
Just had a similar story with mine and it was the main relay it's its fed from the inertia switch under the bonet you will find it under the drivers seat on mine there is a black relay and two yellow ones, the main relay is the middle one (yellow), when I replaced it the heater plugs kick in the fuel pump starts and the nanocom connects.

sierrafery · Nov 10, 2018

raywin said:
....the main relay it's its fed from the inertia switch under the bonet you will find it under the drivers seat.....

maybe in a Defender, here it's about a D2, that relay is in the engine bay fusebox R9 and it has nothing to do with the OBD socket's feed

Paul Wootton · Nov 10, 2018

sierrafery said:
Check fusible link FL3

Thanks for the info,I will check thaat out,its strange as the fuel pump runs and all dash lights seen to work,engine cranks over but does not start.
The nanocom is working fine on another D2 so other than you info I am at a loss.
Paul

neilly · Nov 10, 2018

Have you checked the fuel flow / pressure at the FPR?

Cheers

sierrafery · Nov 10, 2018

If FL3 is OK measure for voltage in the OBD socket across pins 16 - 4 , 16 - 5 and 16 - body and report the results

Paul Wootton · Nov 10, 2018

sierrafery said:
If FL3 is OK measure for voltage in the OBD socket across pins 16 - 4 , 16 - 5 and 16 - body and report the results

Thanks I will do that tomorrow and let you know the results

janderson41 · Nov 10, 2018

Have you thought about injector seals. I had the same last year and injector seals cured the problem

johnlad · Nov 11, 2018

janderson41 said:
Have you thought about injector seals. I had the same last year and injector seals cured the problem

Injector seals cured a none working diagnostics plug!!

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