Need some advice on a possible ECU problem

[Catmatt]

Got a mate with an 02 TD5 Defender. It was running fine but has been in the shop for some major gearbox and TC work and when they finished - they couldn't get it started.

Firstly the battery was so low it wouldn't crank the engine so they hooked up a booster battery and .....Crank's fine - but no running engine.
1. They swapped the original crank position sensor back on to the car rather than use the CPS that came with the gearbox and TC and still nothing.
2. Hooked up their diagnostic gear (Not a Nanocom) and over 20 faults presented. They couldn't read the fault codes so in desperation, my mate called for some help so I took my Nanocom and manual down to the shop.

The 20+ faults are a quite bizarre ranging from "Auto transmission errors" (It obviously doesn't have an auto) through to "driver speed error" etc etc.

It took my 4 attempts but finally I managed to clear half of the errors but there are still quite a few "Logged" errors....and the engine still won't start. The shop have run out of options and are scratching their heads (They are a reputable 4WD repair business)

I'm suspected a corrupt ECU due to the under-voltage attempts to start it and the erroneous error codes??????

I don't suspect the immobiliser due to point below regarding key-fob.

History -

Car has a 2 plug ECU and is not, repeat not an electronic fob-key. Key into door lock opens all doors and simply unlock steering lock through the ignition key and away you go! Key turns everything on, will crank the engine but no go Joe.....

It was running fine went it went in but mysteriously now won't start. Only has 120K and is in good condition.

Anyone got an idea how to get it to burn some diesel????

[Recy Mech]

Right, firstly the disclaimer: I haven't owned a Landy for years and the army ones didn't have ecu's. I've only gotten back into Landys because my daughter is buying one.

Anyway, from working on MTU's, CAT, Cummins, and Duetz, I'd have a guess and say because the battery discharged way under the ECU's memory voltage its lost all memory and requires to be re 'flashed'. That is the software for that particular engine has to be loaded into the ECU. Or, has someone done some welding on the vehicle and the ECU has been 'spiked'?

If possible go for a re 'flashing' of the ECU.

[spudboy]

I think 02 and earlier TD5s are not flashable ECUs. 03 and up are flashable/reprogrammable.

[mturri]

AFAIK the Td5 ECU is very robust and will work with voltages down to 9V.

Can you hear the fuel pump buzzing on ignition?

Rgds
Matt

[roversmith]

Check the earth wire that bolts to the top of the transfer case, drivers side. If they have forgoten to refit it motor will crank but not start. How do I know this. Dont ask.

[TOUTERRAIN]

Hi, Is the fuel pump running ?

Start by re setting the inertia switch on the bulkhead nr the expansion tank, its a black square with a rubber button on top, simply press it down, if you feel it click, that was the problem

Using some jump leads or cables take an earth(-) from the battery to the post under the ecu , even though the seatbox has 20 bolts I had one that was not earthing!!

If the pump is running, is it noisy ? if they have had any fuel lines off it could simply need purging ?

Have you tried firing the injectors with nanocom ?

Anthony