Hard brake pedal no vscuum to booster

Hard brake pedal no vscuum to booster

This is a discussion on Hard brake pedal no vscuum to booster within the Evoque Maintenance forums, part of the Land Rover Evoque Garage category; hello, My background : 26 years as a professional tech. ASE master tech Just told you that so we can get into this and move ...

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  • 1 Post By Rsquared

Thread: Hard brake pedal no vscuum to booster

  1. #1
    Junior Member
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    Jun 2016
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    Hard brake pedal no vscuum to booster

    hello,

    My background : 26 years as a professional tech. ASE master tech

    Just told you that so we can get into this and move fast if possible.

    Problem : wife was driving on highway on traffic and panicked because she couldnt stop. Brake pedal suddenly hard as a rock. Luckily it was at low speed. We just slowed down from 70 mph and brakes were normal. We switched seats in the middle of traffic and i drove home with paddle shifters for enhine braking and two feet for brake pressure. Ridiculous pedal effort.

    Got home and found no vacuum at booster. Hard plastic line at vacuum pump has no vacuum at the pump. I am not working in a shop at the moment but borrowed an alldata account. No tech info or diagrams on this at all.

    I did see a vacuum switch and pump but have little tools at home and no diag info. Does anyone have tech info on troubleshooting this system? Component info and what the switch does? What supplies the signal to the switch? The EBCM or brake switch?

    I can diag this but really would like diagrams or someone at a dealer who can share tech info.

    Thanks,
    Nick

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  3. #2
    Super Moderator
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    1235
    Join Date
    Dec 2012
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    Canal Fulton, Ohio
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    Welcome to the forum. Sounds like a pretty scary experience, glad there was no accident because of this serious fault.

    Are you familiar with the JLR TOPIx website. If not, I have posted the link below. You can register as a nonprofessional user, you don't have to be an independent shop. Once you login, for a small fee, by hour, day, or week, you can get access to the Range Rover shop manuals.

    You may want to try this, as the fee to look at the shop manual would be far less than having a RR dealer look at your Evoque.

    https://topix.landrover.jlrext.com/t...ikTkF.prs72696
    Rovingvic likes this.

  4. #3
    Senior Member
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    Jan 2013
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    Malibu CA
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    Year and model of car?

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