td5 non start - No fuel pump power, No ecu Light, Nanocom cant communicate with ecu

Jaykay1987 · 2025-02-08T14:20:47+0000

Hi guys,

My 03 disco td5 just cranks & wont start ...

When the ignition is turned on there is no fuel pump activation, no ecu light & nanocom wont communicate. I also cant do the purge procedure by pumping the pedal as the ecu light doesnt come on ... I have checked the ecu plugs, all fuses & replaced all relays from my other td5 (that runs) and still NOTHING!

My ecu is NNW & my other running disco td5 is also NNW, so i swapped that over also to rule out a faulty ecu and its still doing the exact same thing!

Anyone any ideas as to what to check next, im at my witts end!

Cheers guys

Anaconda · 2025-02-08T14:48:13+0000

Fuel cut off under the bonnet?

sierrafery · 2025-02-08T15:40:57+0000

Hi, clarify few things:

Jaykay1987 said:
I have checked the ecu plugs, all fuses & replaced all relays from my other td5 (that runs) and still NOTHING!

Hi, when you say all fuses do you mean those from the interior fusebox too?

Jaykay1987 said:
no ecu light & nanocom wont communicate.

only the MIL("ecu light") is missing after ignition all the other warnings are working? and can you communicate with other ECUs(SLABS, BCU, etc)?

btw is it manual or auto?

Jaykay1987 said:
My ecu is NNW

All the ECUs have NNW on them, that's the software version, the p/n is relevant, MSB or NNN ?

Jaykay1987 · 2025-02-08T15:48:44+0000

FIXED!! I pulled the engine fuse board out, all wires going green/corroded underneath & one of the wires to a plug was snapped ... So i replaced a pin out the plug and hey presto!

She fired first twirl !

Thanks for the suggestions guys!

hughdavies · 2025-02-08T16:38:58+0000

You are supposed to carry the muck in the load bay, not under the bonnet.

Anaconda · 2025-02-08T17:42:01+0000

Jaykay1987 said:
FIXED!! I pulled the engine fuse board out, all wires going green/corroded underneath & one of the wires to a plug was snapped ... So i replaced a pin out the plug and hey presto!

She fired first twirl !

Thanks for the suggestions guys!
View attachment 334714 View attachment 334715

Good result, looks like it's been stuck in a swamp.

Dippypud · 2025-02-08T17:51:44+0000

Jaykay1987 said:
FIXED!! I pulled the engine fuse board out, all wires going green/corroded underneath & one of the wires to a plug was snapped ... So i replaced a pin out the plug and hey presto!

She fired first twirl !

Thanks for the suggestions guys!
View attachment 334714 View attachment 334715

Ever thought of giving the local archaeology club a ring, they clean that up in no time ... and if they find any 10mm sockets you get them back ...

Jaykay1987 · 2025-02-08T18:58:14+0000

not been in a swamp, but needs a patch of welding under the arch, so flicks all the mud up

... So suppose thats the next job

td5 non start - No fuel pump power, No ecu Light, Nanocom cant communicate with ecu

Jaykay1987

Active Member

Anaconda

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sierrafery

Well-Known Member

Jaykay1987

Active Member

hughdavies

Well-Known Member

Anaconda

Well-Known Member

Dippypud

Never Knowingly Understood

Jaykay1987

Active Member

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