[928uk] PSD

[Alexander Popov]

It is worth pointing out that the PSD light would illuminate even when the actual system is not functioning. 

You can get error messages for many reasons. To name but a few:

- faulty pump cannot build enough pressure in the accumulator
- air lock in the system fooling the solenoid valve 
- faulty solenoid valve
- faulty pressure switch 
- slave cylinder leaking into transaxle. not enough fluid, pump cannot built pressure. this should be part of the annual inspection. at the age our cars are, the seals are beginning to get very brittle. left for too long, it will destroy the gearbox. 
- faulty ABS brain
- faulty ABS sensor 
- faulty PSD relay in spare wheel well

Some of these can be diagnosed with the help of a Spanner or Hammer, but for others you would need your eyes and hands. 

Hope this helps,

Alex

Sent from my iPhone

On 16 Feb 2012, at 09:49, "Chris Madden" <madds at compuserve.com> wrote:

> Hello All
> 
>  
> 
> When I bought my car I was aware that the PSD was not working as the dash told me whenever I started the car, I’ve since had the pump overhauled by Dr A which seemed to fix it and I now see the PSD light active from time to time.
> 
>  
> 
> But I then found that occasionally when cruising at Motorway speeds in a straight line and with apparent loss of traction, the PSD light would appear and then possibly be disengaged. I mentioned this to Dr A on my next visit and he changed the ecu but it still switches itself off and it seems to happen at speeds around 60mph. (this may be coincidence), but I’ve never seen it happen at low speeds.
> 
>  
> 
> Dr A has advised some self-diagnosis to try and keep on top of costs and so I wondered if anyone else has experienced anything similar?
> 
>  
> 
> Many thanks
> 
>  
> 
> Chris Madden
> 
> Guards Red 1990 GT
> 
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