Defender td5 - no power

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sierrafery said:
Might be some coincidence as it was a quite big job done on it, i say again, if your's doesnt have a fob nor central locking it has no immobiliser so the problem is something else, connect a ground to pin 6 of the starter relay then crank it with the ignition and see if you get any diesel smell on exhaust... a crank sensor signal failure will also not let the ECU open the injectors
Click to expand...
Morning. I’m going to go and try that now.
My only thought at the moment tho, when the ignition is cranked, surely voltage must pass to pin 6... From the crank live of the ignition? As this completes the circuit... if that’s the case is the Ecu telling the alarm Ecu not to allow that circuit?
Also thinking could it be a bad ground, but I believe I have them all on - fresh galv chassis... main battery, 2 transfer box, bulkhead to chassis strap and loom.
Any others I’ve missed?
Final one... is there a fuse for the alarm Ecu/ where would it be?
 
sierrafery said:
Might be some coincidence as it was a quite big job done on it, i say again, if your's doesnt have a fob nor central locking it has no immobiliser so the problem is something else, connect a ground to pin 6 of the starter relay then crank it with the ignition and see if you get any diesel smell on exhaust... a crank sensor signal failure will also not let the ECU open the injectors
Click to expand...
Earthed the wire, Cranked it first thing and it started... then stopped pretty damn quick...
Trying the bleed / prime procedure... and charging battery again...
is that a good sign? Or could it be diesel got past the injectors overnight?
 
That's the dillema cos if it's so basic modell which didnt have fob nor central locking it might not have alarm ECU at all cos for remobilisation a fob is compulsory, here's from the manual:
IMPORTANT INFORMATION
The engine immobilisation system relies
on the handset to re-mobilise the engine.
Look after the handsets at all times,
protecting them from loss, damage and
battery discharge.
If the engine has immobilised passively,
re-mobilisation will occur when the
starter switch is turned to position ’II’,
provided the handset is on the same ring
as the key and in close proximity to the
switch.
• ALWAYS keep the handset on the
same ring as the key.
• NEVER attach both handsets to the
SAME key ring.
Any attempt to start the engine while it is
immobilised will cause the engine
immobilisation warning light (on the left
of the warning light panel) to flash.

Can you smell any diesel at the exhaust while you crank it? .... i'd try to bump start it if i was you cos i've seen cases when the starter motor mixed up the crank signal... a diagnostic tool would be a big help
 
That was my thinking too, but there definitely is the alarm Ecu box behind the dash and the black and orange from the starter relay goes to it.

diesel - yes there is a whiff from the exhaust.

just done the prime 5 times, and cranked sounded like it tried, but lost power, so battery back on charge! Wonder if battery a little weak too... after a few cranks...

a friend has a laptop diagnostic system which I’ll try to borrow... delph software I think...
 
sierrafery said:
That's the dillema cos if it's so basic modell which didnt have fob nor central locking it might not have alarm ECU at all cos for remobilisation a fob is compulsory, here's from the manual:
IMPORTANT INFORMATION
The engine immobilisation system relies
on the handset to re-mobilise the engine.
Look after the handsets at all times,
protecting them from loss, damage and
battery discharge.
If the engine has immobilised passively,
re-mobilisation will occur when the
starter switch is turned to position ’II’,
provided the handset is on the same ring
as the key and in close proximity to the
switch.
• ALWAYS keep the handset on the
same ring as the key.
• NEVER attach both handsets to the
SAME key ring.
Any attempt to start the engine while it is
immobilised will cause the engine
immobilisation warning light (on the left
of the warning light panel) to flash.

Can you smell any diesel at the exhaust while you crank it? .... i'd try to bump start it if i was you cos i've seen cases when the starter motor mixed up the crank signal... a diagnostic tool would be a big help
Click to expand...
That was my thinking too, but there definitely is the alarm Ecu box behind the dash and the black and orange from the starter relay goes to it.

diesel - yes there is a whiff from the exhaust.

just done the prime 5 times, and cranked sounded like it tried, but lost power, so battery back on charge! Wonder if battery a little weak too... after a few cranks...

a friend has a laptop diagnostic system which I’ll try to borrow... delph software I think...
 
The alarm ECU is only for central locking on basic modells cos if the vehicle didnt have fob from factory the immobilisation is disabled, if it was functional the red LED on the dash should be on.... i doubt that Delphi will work with the Td5
 
sierrafery said:
The alarm ECU is only for central locking on basic modells cos if the vehicle didnt have fob from factory the immobilisation is disabled, if it was functional the red LED on the dash should be on.... i doubt that Delphi will work with the Td5
Click to expand...
Ok, so based on smell of diesel does this mean the injectors are potentially working?

might try the bump start later, have to get it out of the barn first tho!!!
 
sierrafery said:
Yes, i'd say so, also try the trick i recommended here: https://www.landyzone.co.uk/land-ro...-sthle022-sttlp009.352758/page-3#post-4865509
Click to expand...
Ok... so feel like a absolute d***, but on the up side, it’s fixed.
someone (I hasten to add not me) had take the bloody fuse out!!! I thought it was just a spare space, till I traced it back on the wiring diagrams... basically alarm Ecu wasn’t getting any power.
Hence not communicating with the Ecu or providing the ground for ignition.
-Fuse in
- temp ground removed
Fired up first time!!!
The upside is I now have a intimate knowledge of my electrical systems!!!
@sierrafery thank you for your help and advice... and not giving up on me!!!
 
sierrafery said:
I'm glad it's fixed... that's why i asked many posts ago about the fuses if you recall and you said all OK https://www.landyzone.co.uk/land-rover/defender-td5-no-power.359474/page-2#post-4866072 ... i'm glad you updated cos i was in a search to see how would a fobless vehicle be immobilised and couldn't understand then found this: https://blackbox-solutions.com/help/SM031.html
Click to expand...
I do, hence why I fee a little stupid now. And I had checked all the fuses that were there!!! Only found it was missing from taxing the wiring.
Again thank you for following this through!
It is interesting tho, that the alarm Ecu is standard across all models and obviously has functions switched on and off...
 
That was the dillema cos there are some basic modells which dont have it at all that's why in the connector view of the relay at pin 6(circuit version 19) the wire is simple black so it's connected to earth...at least we know now that if te wire is BO there is an ECU which can make tricks if it has no feed so i learned something too.:cool:
 
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