Hi John,JohnCKL wrote:I think some HA2 are malfunctioning like mine which sticks to hard mode all the time. I still have not found out the problem as car is being overhauled. Perhaps those with hard mode permanently on will benefit from non-HA spheres most. Of course it would be best to find out the cause but in my case, I've regassed all spheres, changed front electrovalve (to used unit) but only slight improvement. I've bounced the front of other HA2 Xantias and they are very soft, perhaps even softer than non-hydractive cars. I will continue to investigate after my car is fixed.
If you've checked both the spheres and the front electrovalve and its still stiff at the front, I would suggest checking the voltages coming from the computer.
If you refer to my other thread where I show pictures of installing diodes by the ECU you will see which wires it is - you can simply use a small pin attached to your multimeter positive probe to stick into one of the white wires and connect your negative to the chassis.
You should expect to see 12v for half a second when a door is opened, and then dropping to an average of about 3v until 30 seconds after the door is closed. You should see the same on both white wires. (Front and back)
An analogue meter is probably better for this as the 3v is actually a pulse waveform.
If you see only a brief pulse of voltage and then nothing, the most likely cause is a broken connection to one of the electrovalves - which the computer detects as a fault and shuts off the output for one minute before trying again briefly.
If you suspect a broken connection to an electrovalve, try unplugging the white plug from the computer (remove the fuse first! also there is a clever little wire clip that has to be removed..) and measure between pin 1 and 8 for the front valve and pin 2 and 8 for the rear valve, it should measure about 3 to 5 ohms.
Regards,
Simon