Just thought I'd update on my situation.
The power-steering fluid was topped up when I had the car serviced about two weeks before the issue begun, this raises suspicion.
I had my battery replaced with a much larger one just yesterday, this did not fix the issue.
I do have an after-market steering wheel fitted which has been in the car for over 3 years, would the problem take this long to develop as far as the steering wheel is concerned?
I have a can of contact cleaner, I will go crazy with it on the plugs and connectors tonight.
I have also attempted numerous times to get the car to go into diagnostic mode without success.
The issue does not appear to be weather related. Rain or shine the problem is still there.
The power-steering is definately affected by the HICAS. The power-steering works fine when starting the car in the morning, it is only if you turn the car off and then back on that the HICAS light comes on and the power-steering does not work at all. It seems you must turn the car off, leave it to sit for about 45 - 60 minutes before you are able to start it again without the HICAS/Power-steering failure. I think this piece of information would be key to working out what the problem is.
What is affected by leaving the car off? The only thing I can think of is its something heat related and I am by no means a mechanic so I might be being naive or missing something stupidly obvious. But that's what all you guys are for, right?
Thanks in advance
- Ben