605 powersteering

I have a 605 2,5 D Turbo with a powersteering, which power adjust to the
velocity of the car.
Currently this adjusting systems seems to live its own live. Sometimes I
need a lot of force to steer the car and then suddenly the steering is
nearly done without any force. When this particulairy happens in a curve,
you can imagine what happen.
Does anybody know how this system functions and where to find the electronic
and hydraulic components in the car?

 

Can't help a deal, but his sounds a lot like a problem I had on a granada
when the power steering fluid was leaking. I found it safer to drain it
altogether and use muscle power rather than go through that unpredictable
stage you describe.

 

Hi Ron,
Sounds like the "normal readjust" after a failure. The system drops
down to lowest steering force for about 20 to 40 seconds and then
returns to normal function. Mostly the failure is because the velocity
sensor isn't working (faulty cable?). On early models the sensor is
beneath the speedo cable. Later models (after 1993) have no speedo
cable, but maybe the sensor is stil there.
To have a look at the amount and quality of the power steering fluid
is a good idea too. How is the quality of the power steering pump
belt?

If the failure is continuous, then the dealer can check for the fault
code. Unfortunatelly there is no continuous memory, so if the fault
isn't showing, there is no fault code to be read.

Matthias