After replacing the Solenoid Valve, rear vent up, but front wouldn't.
After replacing valve with the one that work before, result is the same
front wouldn't come up. Code is C2302

If anybody have ideas or solutions, please help.

 

C2302 is "Reservoir plausibility error," meaning the reservoir is not pressurizing as expected from the compressor running time. Could be a weak compressor, could be an air leak.

Keep in mind that once the C2302 code is thrown, and you see "Air Suspension Fault" on the dash, the air suspension module gives up and stops trying to manage anything until the the car shut off and restarted. The idea is that of the system isn't pressurizing even though the compressor is running, something's wrong, so let's not burn up the compressor.

 

It looks like there is no air coming to front shocks. Rear, even if we're
changing solenoid valve or draining all air, is coming back in seconds.
There are 4 new shocks, pump, valve and new level sensors, not yet
calibrated and when we've replaced everything but valve, it was working
like a charm, but problem with front started after we've replaced valve.

It doesn't make any sense, but after 24 hours trying to find what's wrong,
we are not even an inch closer to find what's wrong.

 

Are you getting and maintaining pressure in the reservoir? That lack is the only cause I know of for the C2302.

 

Based on a fact that rear is getting up, then there must be
enough of pressure but there is low air pressure in front,
then 2 valves can't be damaged but they are acting the same.
Why air wouldn't come to front is mystery.

 

It's something would be hard to believe, but I just learn that till
yesterday morning my reservoir was disconnected completely.
My mechanic find leaking valve connection to reservoir so he
remove tube and then plugged valve for good till new valve arrives.

Hard to believe? I drove with disconnected reservoir for 3 days.
Car was parked for 2 days without dropping levels an inch and ride
I couldn't believe tolerable almost perfect. Only after replacing valve
and connecting reservoir, all hail breaks loose.

 

Two things to remember:
1) The system raises the rear first, then raises the front.
2) It takes less pressure to raise the rear since it is lighter.
Do you have a reader to see what the reservoir pressure is building to? If it is only managing around 100 psi the back may rise but the front cannot.

 

No, I don't have a reader. I have Mongoose, but I don't know how to use it.
Bad news, today it wouldn't raise back. It looks like pump stop working

 

Probably not bad news - just confirming the need for a new pump.
Do you have the SDD setup to go with your Mongoose? As long as you do not try to program any modules you will not hurt the vehicle during learning how to use the program.

 

The pump and valve is new, installed above 5 months ago.
Could it be relay?

My Jag could relax. I wouldn't know where to start.