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Pump replaced but air bags wont fill.

Discussion in 'LR3' started by Sean Tumilty, Feb 13, 2021.

Car Parts
  1. Sean Tumilty

    Sean Tumilty New Member

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    About a month ago the air suspension stopped working. The old pump was blowing the 60 amp fuse so I threw a meter on it and sure enough, it was grounding out. Just trying to figure it out I depressurized the system with the RWS tool (I know I should not have done this, I was thinking maybe it would take pressure off the pump a allow it to start up. BAD IDEA!!!). I had driven it to work and back one time (very slowly) before parking it because it was just too bouncy to drive. Before this 1 drive (about 10 min) to work the only faults were the air suspension. About half way to work the speedometer stopped working and the hdc and abs lights came on. I limped it home and it sat for about 2 months.

    Today I finally had the time to replace the pump. new pump installed and the air suspension light is off, HDC, ABS lights remain. The pump runs the normal amount to fill the tanks then shuts off. The suspension will not raise. Its like the valves don't even open to let air in. I have tried resetting it but I'm not sure I'm doing it right. I can communicate with the level sensors and run live data on them so I don't think its a EAS computer issue. I replaced the fuse and relay for the pump at the same time. It had a wheel speed sensor code that I cleared. I wouldn't think that would keep the suspension from at least airing up.

    I now have it on a trickle charger and its on the ground. All I need to do is get the suspension to air up a little so its drivable.

    A little background;
    The front and rear shocks were replaced about 2 years ago along with the air pump with a reman unit. None of the valve blocks have been replaced.

    I currently cant diagnose a leak because it wont even attempt to air up.
     
  2. Sean Tumilty

    Sean Tumilty New Member

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    Also the tire pressure light is on like it lost communication with that too
     
  3. Sean Tumilty

    Sean Tumilty New Member

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    Okay so the air bags finally filled up and the vehicle drives, I guess it just needed rolled back and forth a bit. The front right wheel speed sensor is bad and needs replaced so the hdc light I think will stay on until I do that. The speedometer still doesn't work. It says speed sensor A fault. I’m hoping they all relate to the wheel speed sensor.
     
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  4. Kerrie

    Kerrie Full Access Member

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    I have front and rear driver's side wheel speed sensors that need to be replaced. The entire abs system is out, traction control, emergency brake, hdc, and it won't raise up from access height (says it's for stability). I thought it was the battery, so I replaced that. Still getting all the warnings. My mechanic hooked up his computer and it said both sensors on the left side are out.

    If you can find the front sensor, please let me know where! I've checked atlantic british and autohausaz and it seems they only have the rear sensor.
     
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  5. DaytonaRS7

    DaytonaRS7 Full Access Member

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  6. bbyer

    bbyer Full Access Member

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    The odds are you have a broken / corroded wiring in the left front wheel wheel.

    In other words, you do not have an ABS sensor problems but it is just that the signals from the sensors are not getting to the computers.

    The link below discusses the concern. The reason I am familiar with this in my 2005 appeared to need a new ABS thing thing that all the brake lines feed into - that was after changing a rear sensor or two and no joy. The fix cost was minimal but the finding cost was high - well not as high as new ABS stuff.

    From 2008 on, the location of the connectors changed but the problem was not connectors but wiring to the connectors. Good luck.

    http://www.disco3.co.uk/forum/post934961.html#934961
     
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  7. Kerrie

    Kerrie Full Access Member

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    That is a great post and great pictures! I will be checking that if my lights come back on.



    I changed front and rear drivers side speed sensors and have taken a couple of nice long drives. Everything seems to be normal now. Someone else had mentioned it was unlikely both went out, but after getting the fender flare off, there was a lot of dirt up there. And that was after what I thought was a good wash. So with all the snow mud slinging and then the constant refreezing and all the dusty dirt road driving from last summer and fall, I am not at all surprised both sensors went out.

    Thank you everyone for your help and advise!
     

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