2010 Renault Laguna 2.0ltr 150 Tom Tom Dynamique
Variable Power Assisted Steering on Laguna Mk 3 2010 2.0Ltr 150 Dynamique.

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Dave Gibson
Driver
1 points

Problem added: Aug 26, 2020 (1 month ago)
Having many problems with the Variable Power Assisted Steering on Laguna Mk 3 2010 2.0Ltr 150 Dynamique. Noticed that the steering appeared to be getting easier/lighter when speeding up instead of stiffening firstly totally opposite to what usually happens and occasionally car seemed to wonder slightly taking a shallow corner or bend under speed. Firstly tried checking fluid level in reservoir which I found hiding under N/S front wing which was a little low so was topped up after checking that no ingress of dirt had got into reservoir. This was to no avail so my local garage suggested taking all the Pump/Motor off and taking it to a power steering specialist a couple of units away from him. When we took it to them they couldn't test it even with the vast amount of test equipment on hand as some of the connections couldn't even be connected to with weird configurations etc. Pump was refitted, etc and tried again but still no difference. All the steering components,springs,ball joints ,track rods & anti-roll bar etc have been checked along with the tracking 3 times and all found to be sound. The conclusion was that the Pump/Motor was probably at fault/failing so a new one had to be found eventually coming from Paris as there wasn't one in the whole of the UK. This has now been fitted and at extra cost been coded to the car|||||||||||||||||||||||||||||. The steering is now a lot better but I am still left with the slight wondering on occasions and two tyres have had to be replaced at the front as they were showing signs of wear on the inner inch or so and only 4 months old from new and the tracking has been redone yet again which was only very slightly out. Any suggestions would be appreciated as the costs are now starting to mount up on the heavy side. Regards

Car details
Car: Renault Laguna
Variant: 2.0ltr 150 Tom Tom Dynamique
Model Year: 2010
Category: Steering, Suspension, Brakes, Wheels & Tyres
Replies and Fixes
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bustedknuckles
Legend
1,855 points

Aug 26, 2020 (1 month ago)
Wow! You are certainly having fun with steering ,It could be that the car is just sensitive to road camber ,which could be down to so many things ,even tyres fitted,a really difficult thing to diagnose without actually experiencing the fault,or are you actually feeling that the car is skipping on the road at times,could be related to rear end suspension issue?a full 4 wheel alignment would show full thrust line of the vehicle and would adjust this evenly as a starting point
Avatar
Dave Gibson
Driver
1 points

Aug 26, 2020 (1 month ago)
Hi Busted Knuckles,
Many thanks for your prompt reply/suggestions. I've had a Full 4 wheel track done so that one is off the list as I've come across this before on a 4 wheel drive Cosi built some years ago but most Lagunas apparently haven't got 4 wheel tracking, if you speak to most Renault mechanics 25% will say Yes they have but the other 75% will say No it's a dead axle.
It's like a black art keeping them going but I'm lucky in one way because the major problem i.e. The Electronics which Renault are notorious for are right up my street. Renault will tell you you can't buy a LED bulb for the Multi Switch Unit in the driver door for the windows when only one is gone but you'll have to buy the full Switch unit @ £280 approx. Real price 10p for the bulb and about 20 minutes in time & not even a soldering iron in sight or required. Crazy!!!!!!!!!!!!.
I have heard but I can't confirm as there are no workshop manuals etc to check, that the Power Steering has a separate Pressure Sensor and a Speed Sensor to activate the Fluid Circulation from the Speed Sensor & the Amount according to Speed to either have soft steering or stiffer steering at speed via the Pressure Sensor. Renault seem a bit vague in so much as they say the Pressure Sensor "should" be in-built into the Motor/Pump so as the pump is New that shouldn't be a problem but where the Speed Sensor is, is anybody s guess. Any ideas?????? I'm wondering if the Speed Sensor has decided its had enough so the Pump/Motor is sort of running its self and not really stiffening the steering up as the Speed Increases so making it super sensitive at speed and making the car have a wobble now and then.
I'd appreciate any ideas you may have. Regards. Dave G.
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whittingehame
Legend
14,861 points

Aug 26, 2020 (1 month ago)
No load sensor on steering rack ?
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bustedknuckles
Legend
1,855 points

Aug 28, 2020 (1 month ago)
Most cars have a speed sensor on the steering rack itself on some it’s internal to rack.
Avatar
Dave Gibson
Driver
1 points

Aug 28, 2020 (1 month ago)
Thanks to whittingehame for your post & Hello again bustedknuckles for your post. I'm getting the feeling Renault know more than what they are willing to admit.I got the comment that it can't be the Speed Sensor as the vehicle speedo is working !!!!!!!!!!!!!!!!!!!!!! but yet according to others there isn't one fitted separate.??????????????? I'm going to have to dig deeper into this as the more I think about it it seems more speed related sometimes appearing to partially work at speed about 25-30 ish then other times very light making it very sensitive. (Any idea what sort of speed the steering should start stiffening up)
Dread to think what sort of price it will be if its inbuilt in rack. Have to play it by ear. Thanks once again for your reply much appreciated,will keep you posted. Best Regards. Dave G
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