sierrafery said:
So, tested nanocom on mine, the values at idle from cold start are as in the pic with slight fluctuations(there are moments when some silly values are displayed for a second but that's certainly a glitch), on the DCV's the values were 0.000 at first then i checked again after the output tests and they were 0.001(not relevant IMO)... sorry for the quality it
was sunny outside but you can see if you magnify it.

The warning lamp starts flashing on Output - ON command and stops with OFF, for the DCV test - ON extreme attention is needed but you must feel a short movement in the body once then OFF on that valve and go to to the other which must behave the same... just be aware that it's a very weak movement but if you expect to feel it it's certainly there, try more times on both valves consecutively with on-off as i explained... or get assistance, my son kept his hand on the DCVs and he noticed some activity

see the video(it expires in 24 hours) how the fluid's activity must be:

IMO if your ACE fluid is not pretty the same with the PAS your problem is definitely with the pressure for some reason(i dont know why yet, might be as simple as dirt in the block)
Click to expand...

sierrafery said:
So, tested nanocom on mine, the values at idle from cold start are as in the pic with slight fluctuations(there are moments when some silly values are displayed for a second but that's certainly a glitch), on the DCV's the values were 0.000 at first then i checked again after the output tests and they were 0.001(not relevant IMO)... sorry for the quality it
was sunny outside but you can see if you magnify it.

The warning lamp starts flashing on Output - ON command and stops with OFF, for the DCV test - ON extreme attention is needed but you must feel a short movement in the body once then OFF on that valve and go to to the other which must behave the same... just be aware that it's a very weak movement but if you expect to feel it it's certainly there, try more times on both valves consecutively with on-off as i explained... or get assistance, my son kept his hand on the DCVs and he noticed some activity

see the video(it expires in 24 hours) how the fluid's activity must be:

IMO if your ACE fluid is not pretty the same with the PAS your problem is definitely with the pressure for some reason(i dont know why yet, might be as simple as dirt in the block)
Click to expand...

Thanks for the video. Compared to the video I have almost no movement in the reservoir. With regards the values shown on the Nanocom, I have the following:
Pressure sensor: 016.44 vs 18.76
Residual pressure: 000.34 vs 6.47
System pressure: 000.34 vs 6.45
It appears that my system pressure is half of what you are seeing. This could be a result of: 1. Faulty ACE pump (not likely because it is new, unless it was damaged when the hydraulic pipes were installed incorrectly, 2. Restriction in the high pressure line (attenuator damaged?) 3. Blockage in valve block.
The output tests do not result in any flashing warning light or movement due to acuators eing energised. This makes me think that there is an electrical problem. What is curious is that the system functioned before I changed the hydraulic pipes.
 
MJI said:
I have a dodgy solenoid I need to swap out (sitting in new solenoid storage between the seats), triggered other side of Hereford, then near Llandovery.

Was very unsteady when not running.

Both times I reset with Hawkeye and carried on
Click to expand...
I hear you. Hindsight agrees with you. However, after changing all the hydraulic pipes, new ACE pump, new (used valve block, new front actuatorand new (used) ECU, new "blue" pressure control valve solenoid and the directional solenoids test correctly, I am reluctant to have the problem get the better of me at this stage. Thanks for your comments.
 
Gros Niglik said:
The output tests do not result in any flashing warning light or movement due to acuators eing energised. This makes me think that there is an electrical problem.
Click to expand...
Usually an electrical problem would bring on the amber or red warning instantly after the self test and should not affect the activity in the reservoir cos at idle the fluid recirculates with free flow, unplug all the solenoid connectors and watch if the activity in the reservoir improves or not to rule out a short to supply on the pressure side but it's quite unlikely... it's possible that there is no movement on the DCV tests due to low pressure as the actuator can't move without pressure.

the fact that the warning light doesnt react to the output command but it comes on while driving is very strange i can't find an explanation for that other than the replacement ECU is faulty too or your nanocom makes tricks(is it upgraded to the last firmware?)

Undo the pump's outlet and return pipe from the block and connect them together with a piece of hose and clamps and watch the reservoir then...if it will not be as in the video this way means that the pump was hurt or the feed pipe clogged when you connected the pipes reverted but if the fluid will circulate hard this way replace the valve block. Good luck
 
Last edited:
Again, your comments are invaluble. I will do as you suggest. As mentioned in my itriductory profile, I completed a ground up rotisserie restoration of a 1965 Jaguar E type. Attache is an image. The electrical diagram is only one (1) page. Life was simpler then. I underline that I am a hobby enthusiast but have learned many things about cars and boats due to this uncurable obsession. Never too proud to ask for help!

IMG_20171103_1807159.jpg IMG_20240120_141701.jpg
 
Gros Niglik said:
I hear you. Hindsight agrees with you. However, after changing all the hydraulic pipes, new ACE pump, new (used valve block, new front actuatorand new (used) ECU, new "blue" pressure control valve solenoid and the directional solenoids test correctly, I am reluctant to have the problem get the better of me at this stage. Thanks for your comments.
Click to expand...

I did the hose conversion with mine, it is staying!

After running wrong way I would try the above pump check.

To be honest, has to be pump or attenuator.
 
I did the testand there definately was more circulation in the reservoir, but nothing like in the PAS reservoir. If I crack open the banjo joint on the ACE pump it squirts significantly. This leads to believe that the problem is a damaged attenuator in the high pressure pipe. I have ordered a new one and hope to have it in hand before the weekend. BTW with the high pressure line anttached to the return line, the amber light illuminates.
 
Unfortunately, the supplier sent the wrong pipe. I have ordered a correct on from LR Parts in England. I still don't understand tha when I trey the output "warning lamp" in outputs on the Nanocom, I get no reaction evem with the new ECU.
 
Gros Niglik said:
I still don't understand tha when I trey the output "warning lamp" in outputs on the Nanocom, I get no reaction evem with the new ECU.
Click to expand...
That's a mystery for me too, unless both ECUs have the same fault...Is your nanocom up to date with last firmware?
 
sierrafery said:
So, tested nanocom on mine, the values at idle from cold start are as in the pic with slight fluctuations(there are moments when some silly values are displayed for a second but that's certainly a glitch), on the DCV's the values were 0.000 at first then i checked again after the output tests and they were 0.001(not relevant IMO)... sorry for the quality it
was sunny outside but you can see if you magnify it.

The warning lamp starts flashing on Output - ON command and stops with OFF, for the DCV test - ON extreme attention is needed but you must feel a short movement in the body once then OFF on that valve and go to to the other which must behave the same... just be aware that it's a very weak movement but if you expect to feel it it's certainly there, try more times on both valves consecutively with on-off as i explained... or get assistance, my son kept his hand on the DCVs and he noticed some activity

see the video(it expires in 24 hours) how the fluid's activity must be:

IMO if your ACE fluid is not pretty the same with the PAS your problem is definitely with the pressure for some reason(i dont know why yet, might be as simple as dirt in the block)
Click to expand...

Does your high pressure pipe have and integral attenuator?
 
Gros Niglik said:
Does your high pressure pipe have and integral attenuator?
Click to expand...
I have no ideea what's inside or how it works, that pipe is still the factory fitted one so it's like it was meant to be everything else was replaced(pump, valve block, ram pipes, actuators)
 
I changed the pipe but no change. The system is obviously full of air, but the Nanocom outputs still do nothing and the bleed fucyion does nothing. I also reloaded the Nanocom software. I can't believe it is the pump becaause it was changed for a brand new one just befor I took ownership of the vehicle. Perhaps I should try yet another ECU.
 
If you dont get similar with PAS fluid activity in the tank with that new pipe connected directly to the return(bypassed valve block) the problem is the pump, as i said the ECU can't affect the pressure albeit it should react to nanocom's commands as i described unless your nanocom is not up to date or something
 
Are the ECU's the same for all Discovery 2 models? The number on the new (used) ECU is CKA08BMD wheras the original ECU is CKA06176F. I don't know if this is a part number or a serial number.
I did download the software again but not difference.
The pump is new and sprays lustily when the banjo nut is lossened. The pressure tansducer indicates 16-17 bar which is in the range of the pressure your system indicates (18.76 bar). This would seem to indicate that the pump is fine.
 
IMO the ECUs are all the same, thinking twice you are right, with that 16-17 bar reading the pump might be ok but i can't find any explanation why the activity in the tank is not as expected unless thereis dirt or something happened in the block when it got pressure in the return port or the pressure control valve is mismanaged by the ECU and reduces the backflow also the fact that the DCVs or warning lamp do not react to nanocom commands is a mystery for me... very strange
 
I will continue to scratch my head and maybe something will come up. BTW the new valve block was thorough cleaned and the solenoids and valves were checked for operation by connecting to a battery before installing in vehicle. I will check continuity of the wires from the pressure control valve.
 
I just checked for continuity for the two wires attached to the pressure control valve solenoid and there was contiuity. Obviously the system has air in it, but the Nanocom bleed function doesn't seem to function. I can see air bubles in the reservoir when I run the engine. I am still scratching my head.
 
It should bleed itself if you drive as fast as you can with many cornerings both sides, for example do some 8's with it on a plain surface(i went in a supermarket's parking after it closed)
 
I was planning to do that as soon as most of the snow has been cleared from the streets. I is stilla mystery as to why there is no action on the output function on the Nanocom. Do you think there would be any merit it removing the ACE pump and stripping it down to see if there is anything unusual inside? The problem is that I would not know what is normal and what is not normal such as rotor tolerances.
 
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