Thread: TD5 Wont start

Originally Posted by goingbush

Its not good enough to just check an earth with a ohm meter, a zero ohm earth can for all intents and purposes go open cct under load. The only way to confirm an earth fault is to run a new cable from neg battery post to the component in question. It pays to run new / redundant earth cables from engine block to chassis, chassis to body, battery to chassis, battery to ECU ,
chassis to loom earth etc etc . Aluminium is conductive, but Aluminium oxide is not - that is the white stuff you find under your body earth lugs and between your body / chassis connections.

If the ECU is earthed through its case then it is earthed!. I have a new cable running from the negative of the battery post to one of the bolts that hold the ECU down

There are 4 earth wires at left end of the black ECU plug when looking from the back of the plug. Pins 1,2, 23,24 from memory. The case is probably grounded for RF shielding given there is what looks like a switch mode PS inside.

It works !

After much reading and trial and error it was the alarm coding section which seems to have been the problem.

On the sticker on the unit in the dash is the week and year and serial number that must be put in.
so on mine the sticker was 27/00
The year is 2000 and the week is 27
The serial number is the next number up from it

Down further in the field that says what type of immobiliser it connects too, in the MEMS/TD5 field i found a doc that said you can put what you like in there, between 0 and about 65000 from memory, so I put in 1234

Then told the ECU to learn the code and then it worked !!

The only thing left I have is the engine light on, with no errors (that are relevant) recorded)
But I am sure it is still in the defender alarm section as I have changed so many things in there trying to fix it.
I have now saved the settings so I can go through and change them and see which one it is doing it

thanks all fro your input

Also I was wondering how often the AS10 does fail. It seems like it would be another show stopper if it failed in the middle of somewhere remote.
Might be another thing to add to the list of parts to take

They fail from time to time, although not common IT IS a show stopper if you are remote.

JC

TD5 ECUs can be modified to not need the link - no more show stopper

Originally Posted by Tombie

TD5 ECUs can be modified to not need the link - no more show stopper

Is it a difficult mod., ? Bob

Hi Bob
when I was reading through the AS10 manual I came across the following (Try at your own risk !!!- back up first)
The last line may be pertinent, but I suspect the ECU still talks to the AS10 even with these options


Plip immobilise: This setting configures the alarm to not immobilize the vehicle whenever the vehicle is locked using the plip. Setting this to NO effectively turns off engine immobilization protection when the plip is used to arm the alarm although it does not affect the immobilization when the key is used or the alarm itself . This can be disabled using the KEY IMMOBILISE and the ALARM ARMING. Turning off all three literally turns the alarm ECU into a central locking controller only.