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CL600 year 2001
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Discussion Starter · #61 ·
There are some issues: When the new box is in the car, it does not raise - it does not react to any actions if I push the buttons on the dash board. Also it does not reach most of the actions of the DAS - for instance does not allow to do the calibration of plunge travel sensors. Actually it does not do hardly any thing.

The issue with the old box is that all works fine, but pressure is limited to 173 bar and it drops from there gradually in 15 min giving the gray "ABC visit workshop" - and the DAS tells that PRESSURE SUPPLY LOW..

It is not possible to drive the car. It can be moved at home, but not on public street.
 

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I'm sorry to say it but you have almost reached the limit of my knowledge, have never come across this kind of issue ...................

One final question ............

Why can it not be driven on Street ? Is this because of ABC problem(s) or another separate issue ?
 

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CL600 year 2001
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Discussion Starter · #63 · (Edited)
I'm sorry to say it but you have almost reached the limit of my knowledge, have never come across this kind of issue ...................

One final question ............

Why can it not be driven on Street ? Is this because of ABC problem(s) or another separate issue ?

Hi yes - in Finland, one should first pay the car owner's punishment taxation for the car before you can take it on the street; and that would be in this case some 6.000 usd. And if I drive the car w/o paying it first, they will charge me that 6.000 usd, plus some thousands of fines on top of that.

That is why we are the most happiest people in the World according to the international research institutes; we collect money from car users and distribute it to everyone; in some cases the hairdressers of the controlling officers even, which just happened again. Forbes: Why Finland is the happiest country in the world - HappyOrNot

Meanwhile just enjoy our Finnish comedian in USA - Ismo:


 

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CL600 year 2001
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127 Posts
Discussion Starter · #64 · (Edited)
Status: I got one very similar ABC Control Unit - with all numbers and letters matching and from the same year CL 600. Installed the analog pressure gauge and started the engine.

First minutes at idle, the pressure was 160 bar in that gauge, but after around two minutes it raised gradually to 193 bar and stayed there. Sounds good! After 15 mins, it was still 193 bar - no changes. Looked perfect.

But then I lowered the car from dashboard - and the pressure dropped in seconds down to 140 bar and warning light appeared. It raised up to 160 bar back, but not any more on top of that.

At the 64 seconds, I pushed the button on dashboard and lowered the car. And then raised it and lowered. It never raised it pressure back to 190 bar afrter that, but started the warning of pressure supply - why it did not raise it back to 190 bar? Solenoid has internal leak?


How does it work - it sounds like when I moved the level operating solenoids, the pressure dropped; can it be so that these operating level solenoids are internally leaking and causing the pressure to drop? But when I do not move the height, should the all weight lay on locked solenoids again - or on operating level solenoids?

Does this give any idea where the issue could be? Shall I change the O-rings to operating level solenoids again; and try to find if there is any issue?
 

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I would need to see hycraulic circuit scheme to interpret what is happening... certain laws are acting in fluid power systems, and that could help to pinpoint problems. Perhaps we should discuss this at private (finnish) lol.
 

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CL600 year 2001
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Discussion Starter · #66 ·
I shall check now the solenoids' O-rings for possible internal leak.

Do these level control solenoids have three positions or two? Can it be that the solenoid stops at wrong point?
 

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To my understanding they only have two positions.
 

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Remember: if there is a leak - it means there is a heat. Heating power is simply flow x pressure.
 

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CL600 year 2001
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Discussion Starter · #69 ·
How soon that can be noticed and where - that extra heating exists because of leaks? I have Infa-Red measuring device? Is that heat something high at that leaking valve block, if there is internal leak in solenoid O-rings?
 

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1l L/min at 170bar means little bit under 300W. How fast 1kg iron block will heat with that power? LOL I don't know how much system should leak if it cannot maintain full pressure, to me it still sounds either contoller is giving wrong signal (IS the pressure control valve adjustable? - that why I would like to see full hydraulic circuit, I am guessing here), pressure control valve is not seeing right signal, or valve is faulty.

Or then pump cannot produce enough flow beacuse of air content, starvation on suction line, inner leaks on pump.
 

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I've never seen it, but I wonder if there is some form of Pressure adjustment or Calibration in SDS ????????????????????????????
 

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CL600 year 2001
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Discussion Starter · #73 ·
EARLIER:" First minutes at idle, the pressure was 160 bar in that gauge, but after around two minutes it raised gradually to 193 bar and stayed there. Sounds good! After 15 mins, it was still 193 bar - no changes. Looked perfect.But then I lowered the car from dashboard - and the pressure dropped in seconds down to 140 bar and warning light appeared. It raised up to 160 bar back, but not any more on top of that. "

I repeated the same test a day after: And I cannot get the same results again - it was only that one time that it raised and kept 193 bar until I changed the height!!

It looks to be related to these height solenoids? Are they really leaking?
 

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It only takes a couple hours to pull them out and replace the o-rings. At this point, I would do that as a troubleshooting step.
 

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CL600 year 2001
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Discussion Starter · #75 ·
No prob with that. I have changed O-rings already twice and today dud again at rear. But no change; the issue remanis.
 

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I have changed O-rings already twice
Are you changing the Viton seal rings as well ?

When I rebuild them I buy the Kit's that have both sets of seals, not just the O Rings ;)

If you have done that, it may just be that you have a bad Solenoid ?
 

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CL600 year 2001
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Discussion Starter · #77 ·
Yes, it can be that one solenoid is not working properly, but testing each obe separately with STAR shows that everyone works ok.....
 

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CL600 year 2001
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Discussion Starter · #78 ·
STAR says after I have tested the B4/5 pressure sensor as seen on the photo:

"Pressure is 173 bar.
Indicated pressure value is less than 15 bar.
The value is not correct; pressure sensor needs to be changed."

What does that mean?

At the same time the analog pressure gauge shows the same 173 bar.

Where does that "indicated pressure value" come from?

Can it be a wiring issue?

But looks to so that it measures the pressure correctly, but.... where does that "indicated value" come from and what is that?
 

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Discussion Starter · #80 ·
Today I installed a refurbished ABC Control Unit from ABC Specialists from Nederlands.

I calibrated strut travel sensors, linkages and inclinations - all went well and "calibration succesfully completed".

Starting car - and pressure raises up to 193 bar.... And goes down to 170 bar in 5 secs.... And raises back to 193 bars in 5 secs and comes down. . The pressure raises and comes down.

The pump sounds like the intake valve is open until it reaches 193 bar and then the intake valve closes and pressure leaks out from the system in 5 secs to 173 bar, and the intake valve opens again....

What the... Holy cow!
 
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