direction control valve fault, possible causes Hydraulic or mechanical fault in pressure control system; possible causes; Regards,Andrew
You may find that the system needs bleeding. Has any work been done to it before? If so it needs to be bled using a suitable diagnostic tool & undoing the actuator rams when instructed so as to allow fluid to circulate properly & bleed air. The rams have to be fully extended so that the top ram seal passes the top hose inlet , thus allowing circulation.
If you have the ability to do a response test you will probably find it will fail, but even when bled properly they can still fail & may need bleeding a few times.
Simon must have been lucky, not needing to bleed his one.
You could have a problem with the valve block or pump also, but I would try carrying out a bleed procedure first.
I just looked closer at your data readings & noticed that your lateral sensors seem to be incorrect. They should read near zero when stationary(i suspect incorrect scan tool interpretation).
fault with the residual pressure ;
possible causes;
pressure transducer fault
damaged/blocked filter
blockage in return pipe
stuck pcv
incorrect fluid
direction control valve 1
direction control valve 2
direction valves stuck(mechanically)
poor bleed
low or aerated fluid
slow pcv response
slow dcv response
pipe failure
valve block to pipework seal failure
filter plug seal failure
pump seal failure
pcv seal failure
dcv seal failure
pressure transducer seal failure
reservoir failure
actuator dome nut seal failure
rod end seal failure
broken drop links(front)
broken drop links(rear)
front strap/bracket failure Rear strap/bracket failure
failed attenuator hose
excessive shock to wheel
worn drop links
worn system bushes
internal actuactor leakage
front actuator internal mechanical failure
rear actuator internal mechanical failure blocked filter
suction hose failure
faulty pump
short circuit c0753-1(og) to ground
short circuit c0771-1(yb) to ground
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