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post #1 of 9 (permalink) Old 21st May 2014 Thread Starter
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Electronic Parking Brake Fault Fixed

This forum helped me find solutions for fixing an electronic parking brake problem on my Laguna 11. So here is some feedback for others with a similar problem.

To recap.
I was getting a 'Check parking brake' fault message on my dash display, but the brake was operating normally.
The car was due MOT in about a month so I decided to live with the 'advisory' and have the fault checked then.
Meantime the battery kept losing power, I renewed it, used the car once and parked up. The following day the EPB refused to work.
Tried the emergency release and nothing happened. Called my breakdown company and they took the car to my local garage for them to investigate, access the EPB and repair if poss.
They did a diagnostic but could not clear the fault code. Brakes remained on so they cut both brake cables to make the car mobile!!!!!!
I drove the car home and have finally managed to fix the EPB.
My tips gained fom this experience.
1. The emergency release is a mechanical pawl and lever mechanism linking both cables within the EPB housing. It is under high tension when the brakes are on, therefore you need a very strong pull on it to separate the link. When this is done the car will be drivable. If the EPB is still working the link can be remade by a reset. Use the reset tip on this forum
2.Do not cut the brake cables as they are an integral part of the EPB and are not easily replaced.
3. Check the free movement of the inner cable at the caliper positions. With the brakes off, or emergency release used, Unclip the cable ends from the calipers and they should freely push in and out. Difficulty in doing this indicates a seized cable. If this happens to one cable the EPB will still operate, but on one side only, as the seized cable wil act as an anchor to the system.
4. Most importantly. Renault diagnostic may show a low power reading. This may not be due to a poor battery charge. Get a decent auto electrician to check the power feed wires to the EPB, with no voltage drop between the dashboard feed and the EPB. My power feed supply dropped from 14V to 8V due to internal wire corrosion found local to the multi connector under the rear seat. Stripped back to sound material, remade and full power feed restored.

Hope this info proves helpful to someone.
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post #2 of 9 (permalink) Old 22nd May 2014
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Re: Electronic Parking Brake Fault Fixed

well done must be chuffed!! you must be the,man to chat to ABOKOR about his problem 5 posts down cheers
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post #3 of 9 (permalink) Old 22nd May 2014
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Re: Electronic Parking Brake Fault Fixed

Cutting the brake cables was a bit drastic for a temporary resolve.

Interesting, this thread is the second I have read today that has featured a mention of poor/failing cabling............lets hope this aspect isn't going to become a growth industry on the forum.
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post #4 of 9 (permalink) Old 22nd May 2014 Thread Starter
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Hello a friend of mine bought a renault megane sw with carminat tom tom and the bar on the lower side of screen not shows, we not know in wich tune is per example... And when we touch the keys of the radio nothing appears on the screen, only the map and information of navigation..
Any help??
Thank you!

You may be correct with that observation.
My auto electrician commented on the fact that a lot of modern cars are being affected by these wire corrosion problems, Does not occur in older models apparently!
It would suggest low grade copper is being used, with a higher level of impurities, which would account for corrosion 'cells' occurring and progressively worsening at points of higher resistance.
The inner wire of my problem cable was ripe with verdigris and just crumbled to the touch when the outer sheath was removed, although there was no obvious damage to the sheath.
Another tip. The weak structure of the core wire will help with locating a badly corroded problem area as it fails when manipulated, and the wire will behave differently from other similar sizes in the bundle.
Or you can always trade down for an older more reliable model!

Yup ama
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post #5 of 9 (permalink) Old 5th June 2014
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Re: Electronic Parking Brake Fault Fixed

Hi all, I am reading these posts with interest....as I too have a problem with the EPB on my 2005 1.9 DCi Renault Laguna. For a few weeks there had been an amber "Parking Brake Warning" on the dash with the amber spanner symbol, this would only appear when I stopped the car. As things do , I just didn't get around to looking for a fault etc. and as the parking brake would work fine when I pulled the handle and also disengaged when starting to drive it didn't bother me too much.
However , now it has stopped working fully , and I now have a red "Parking Brake fault" on the dash with audible warning each time I stop the car and each time I turn off ignition.
I'm wondering maybe if it is a power issue to the brake motor, so was thinking of trying to measure the voltage on that connector under the rear seat .... Can someone tell me if there is a procedure on here for removing the seat and also can someone tell me where abouts is the connector I need to look at ? Thanks in advance for looking
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brake , electronic , fault , fixed , parking

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