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Discussion Starter #1
Hi All, I have a 2011 Grand Scenic (MK3) The Electric Parking Break will not release when you attempt to drive away. I have read the fault code with a Renault Clip and I get this current fault (DTC516C64 Manual Command). I can release and apply the Parking break with a Renault Clip so I assume the Callipers are OK. When I try to release or apply the Parking Break with the Dash switch it just goes from a solid red led to a flashing one and the break does not release. I have changed the switch but no difference. Any thoughts any one? I see lots of help with the MK2 on the forum but not so much for the MK3. I know the clutch position sensor is involved in releasing the parking break as it the slope sensor. From looking at the readings from the Renault Clip I can see that the clutch position sensor is working as it does vary depending on how far down the clutch is. I cant recall what the slope value is reading, I will check it later. Any help or guidance would really be appreciated. I had the parking break warning on the dash for a few weeks but was able to clear it as it was only a stored fault and not a current one but now it is a hard fault and the clip will not reset it.
 

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Super Moderator Technical Supremo Platinum Member
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Correct me if I am wrong but the Mk3 has powered calipers for the EPB rather then the single EPB unit and cables ?
If so, from what we see on here, lots more reliable.

On the Mk2, there are two switches on clutch that affect the EPB.
One is the position sensor, on Mk2, the central switch with long operating lever.
Second is the top switch...can't remember exactly what it does but do know it effects operation and will bring up dashboard error message.
Dunno if same on Mk 3.
Slope sensor controls how much brake is applied and when to release against slope, clutch position and amount of throttle.
 

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Discussion Starter #3
Yes the MK3 has powered calipers and no cables. As I say there is lots of information on the MK2 Parking Break but very little on the MK3. As I say any guidance would be very much appreciated. Thanks
 

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Re: Grand Scenic MK3 Parking Brake will not release.

Check the micro switches in the release handle. Believe there are 3. History of them failing / dropping out of location.
As per DD. There are 3 switches to check:- Clutch Up, Clutch down & Brake too (possibly Passenger side) Check brake lights, to prove that one.
And a clutch pedal Position sensor, which is a variable resistor.
This too is based on my experience of a Mk2. Sorry.
 

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And a clutch position sensor with a variable resistor on a mk2 mb says this is not so
I agree, not WITH.
It IS a variable resistor. It goes from 500 Ohms to about 5000 Ohms from up to down.
How about helping the O/P for a change?
 

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Tartan terrorist in a dress..
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Think when it comes to EPB @notnoc is usually the forum
 

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Super fantastic Mod Technical Supremo Nice Guy
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(DTC516C64 , this code, what diagnostic gave you this code...
 

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Discussion Starter #14
I read the code (DTC516C64) with a Renault Clip. I have not had a chance to check the switches yet, but I can confirm the Clutch on my Scenic 3 has a variable resistor because I could see the reading changing via the Clip when the clutch was pressed. More later.
 

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Super fantastic Mod Technical Supremo Nice Guy
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That was the actual code clip gave you...
Dont connect to the car, switch laptop on..
Boot/open clip, close the box that reads no sensor detected, top line file, then diagnostics, click this, second line down, report, click on this, click consult, bottom right hand corner..
See what is not working, also post your after sales type code on here.
Just the 4 alphanumerical code... let me get that code up, and find out what is not working.
Was there any other faults reported in the UCH....
 

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Discussion Starter #16
Great a clip expert, I really appreciate the help. I will follow your steps and get back tomorrow.

Boot/open clip, close the box that reads no sensor detected, top line file, then diagnostics, click this, second line down, report, click on this, click consult, bottom right hand corner..
But at which point will I connect the ODB connector?
FYI my Clip is ver 151. Also should I enter the VIN manually or let the clip fill it in or does it matter?
 

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Super fantastic Mod Technical Supremo Nice Guy
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Click on the question mark, allow clip to find vin, .
Check this vin with your car, if they match, you are good to go.
If they do not match, use the one off the car...
Without interface connected, top line File , diagnostic , tool, click tool, then click configuration, then user, make sure there is a name in here, if you have not done this,,,
Your post above is correct,,, word of warning, as dont want you getting a slapped wrist DONT post any screen shots:grin2:
 

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Super fantastic Mod Technical Supremo Nice Guy
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Sorry , you wont need to connect interface, you can do all this in the comfort of your chair, or if a naughty boy, in the corner, just make sure you click to close the no sensor connected combo box
 

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Discussion Starter #19
OK "ours 2012" I did those steps and I get 2 faults:

Parking Break
Index
DTC516C64

Title
Manual Command

Characterisation
1.DEF

State
Present

and

UCH
Index
DTC957915

Title
Rear Fog Light Circuit

Characterisation
CO.1

State
Present

The Fog light was caused by moisture collecting in the bulb holder months ago and does not give a message on the dash, I do not think the 2 are related and I am not worried about that for now.

But here is a little more background. I got the parking Break fault on the dash months ago but as it was only a stored fault I cleared it with the clip and all was OK. When it came back last week it was a hard fault and the break would not release when driving away I read the codes and got DTC510111 (Rear Left hand Caliper Actuator) and DTC516C64 (Manual Command). I found the Parking Break ECU and noticed plastic case was a little deformed as if the unit have over heated at some point. So I changed it for another second hand unit and then re tested and the Caliper fault cleared and left the manual command one. I assumed the caliper fault was erroneous due to a bad ECU but perhaps I am mistaken and I should change the actuator on the left caliper and replace the origional Park Break ECU. Any thoughts on all that?
 

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Super fantastic Mod Technical Supremo Nice Guy
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Can you post the vehicle type code, if not sure what this is, again diag report.
You will see a 4 alphanumerical code.. (after sales type code)
 
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