ukclique > rec.cars.* > rec.cars.maintenance

T i m (28.07.2019, 13:10)
Hi all,

Whilst driving the Meriva recently, soon after pulling away and on a
damp roundabout at slow speed, it felt like I'd gone over some diesel
or some such because momentarily the steering went 'light'.

It didn't happen for about a week and again, after it had rained or
the ground was wet, I noticed some strange feedback on the steering
when approaching a space in a car park (but not a surface that would
be so affected by any spilled diesel this time etc)?

So, I'm assuming it might be some issue with the electric PAS and if
so, is there typically any reason outside of just being 'worn out'
(75K miles) that might typically affect an 04 1.6 Meriva?

Could it be water getting into something as I've not had it happen in
the dry and if so, what?

Cheers, T i m
MrCheerful (28.07.2019, 14:36)
On 28/07/2019 12:10, T i m wrote:
[..]
> Could it be water getting into something as I've not had it happen in
> the dry and if so, what?
> Cheers, T i m


Sister's car (with conventional PS) recently developed a very strange
feeling on the steering, turned out to be caused by a bent tie-rod:
Someone had hit the front wheel while the car was parked. The car still
drove in a straight line seemingly normally, but turning was really
weird due to the massive change in tracking, especially in the wet.

Electric power steering fault usually manifests as a notchy feel or one
way has more assistance than the other, there are places that repair the
columns, some even while you wait.
critcher (28.07.2019, 15:57)
On 28/07/2019 12:10, T i m wrote:
[..]
> Could it be water getting into something as I've not had it happen in
> the dry and if so, what?
> Cheers, T i m

would have thought the power steering failing would be instant,heavy and
difficult to steer at all.
MrCheerful (28.07.2019, 16:49)
On 28/07/2019 14:57, critcher wrote:
> On 28/07/2019 12:10, T i m wrote:
> would have thought the power steering failing would be instant,heavy and
> difficult to steer at all.


It is when it gets complete failure or you unplug it. |Before that it
is jerky and odd, apparently the slip ring arrangement is usually the
main problem (I have read)
T i m (28.07.2019, 19:46)
On Sun, 28 Jul 2019 13:36:55 +0100, MrCheerful
<g.odonnell35> wrote:

<snip>

>Sister's car (with conventional PS) recently developed a very strange
>feeling on the steering, turned out to be caused by a bent tie-rod:
>Someone had hit the front wheel while the car was parked. The car still
>drove in a straight line seemingly normally, but turning was really
>weird due to the massive change in tracking, especially in the wet.


Oooerr?

A mate had a Saab 900 with duff PS and that only worked one way. ;-)
>Electric power steering fault usually manifests as a notchy feel or one
>way has more assistance than the other,


That's the beginnings of what I think I felt MrC.

> there are places that repair the
>columns, some even while you wait.


Oh, thanks.

Cheers, T i m
T i m (28.07.2019, 19:54)
On Sun, 28 Jul 2019 15:49:39 +0100, MrCheerful
<g.odonnell35> wrote:
<snip>
>> would have thought the power steering failing would be instant,heavy and
>> difficult to steer at all.

>It is when it gets complete failure or you unplug it. |Before that it
>is jerky and odd,


That's a good explanation of what I have sensed so far. I think if the
Mrs was driving it at the time I'm not sure she would have attributed
it to the PS but the surface (if at all).

> apparently the slip ring arrangement is usually the
>main problem (I have read)


Yup, that's how it felt, like a noisy 'pot' on a radio volume control
etc. As you turned the steering wheel the resultant response from the
road wheels seemed (very slightly) jerky and non-linear and so
slightly affecting the turning radius and the load / feedback on the
steering wheel.

I wasn't sure if they used such a thing or it was an rotary / optical
encoder of some sort? So if a 'slip ring that applies tension /
pressure to something (sensor driving a motor) in reaction to rotation
of the wheel?

Cheers, T i m
Lee (28.07.2019, 22:48)
On 28/07/2019 18:54, T i m wrote:

> I wasn't sure if they used such a thing or it was an rotary / optical
> encoder of some sort? So if a 'slip ring that applies tension /
> pressure to something (sensor driving a motor) in reaction to rotation
> of the wheel?


If you do a search for Steering Angle Sensor, there is a pic of an early
VW one that was indeed an optical encoder - with leds and a slotted disc.
MrCheerful (29.07.2019, 08:57)
On 28/07/2019 18:54, T i m wrote:
[..]
> pressure to something (sensor driving a motor) in reaction to rotation
> of the wheel?
> Cheers, T i m


ecutesting.com (for example) do a rebuild service and have a page about
the problem.
T i m (29.07.2019, 12:18)
On Mon, 29 Jul 2019 07:57:50 +0100, MrCheerful
<g.odonnell35> wrote:

<snip>

>ecutesting.com (for example) do a rebuild service and have a page about
>the problem.


Thanks:

<https://www.ecutesting.com/product-catalogue/vauxhall/meriva/power-steering-eps-electric-power-steering/>

(Assuming it's required) Whilst it's yet another thing to go wrong on
this 'free' Meriva (given to me by Mum after Dad died), it looks like
it may well be doable costwise and wouldn't need reprogramming etc.

Cheers, T i m
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