1999 E39 523i Electrical Fault.

Notices
 

Thread: 1999 E39 523i Electrical Fault.

Reply to Thread
Results 1 to 6 of 6
  1. 1999 E39 523i Electrical Fault. 
    #1
    Bimmer Fan
    Car Details
    Bam Bam's Car Details
    Model of Car:
    523i SE
    Year of Manufacture:
    1999
    Transmission Type:
    Automatic
    Car Body Type:
    Saloon
    Bam Bam's Avatar
    Join Date
    May 2010
    Location
    NE England
    Posts
    17
    Thanks
    2
    Thanked 9 Times in 8 Posts
    I've done a search and came up with lots of answers regarding the problem I have with my E39.
    For the past week my ASC and ABS warning lights have illuminated as well as the MPG Indicator (below Rev Counter) and Speedo gauges stopped working, the OBD which I usually have set at fuel range also starts to go all over the place and when I switch off the engine it pings up "check engine oil level", (oil is fine, topped up to the max and no leaks).
    After reading all the other posts on this it seems it's a fairly common fault which appears and is down to either the ABS Module being faulty or knackered or a speed sensor on one of the wheels, probably the true fault light bringing up the others in tandem.
    What I want to know is can I assume that the faulty sensor is related to the speedo and if so which wheel sensor do I check first rather than go round them all at random and wasting time and effort.
    My thinking is that with the speedo needle going dead this will point me to the faulty sensor if that is the cause.
    Do I need a diagnostic check for this. ?
    Thanks for any advice.
    E39 523i SE.
    Alfa Romeo 2L TS GTV.
    Yamaha YP 125 R Scoot.
     
     

  2. Remove Advertisements
    BimmerForums.co.uk
    Advertisements
     

  3.  
    #2
    BMW Guru
    Car Details
    TheEnd's Car Details
    Model of Car:
    540
    Year of Manufacture:
    1998
    Transmission Type:
    Auto
    Car Body Type:
    Saloon
    TheEnd's Avatar
    Join Date
    Jun 2010
    Location
    Birmingham
    Posts
    8,979
    Thanks
    478
    Thanked 2,990 Times in 2,440 Posts
    Yes, it's all down to one wheel speed sensor that gives info for the ABS and ASC, and also tells the car what speed you are doing.

    I forget which one it was that controlled it though.
     
     

  4. The Following User Says Thank You to TheEnd For This Useful Post:

    Bam Bam (12-08-2010)

  5.  
    #3
    Bimmer Fan
    Join Date
    Jul 2008
    Location
    Middlesex
    Posts
    11
    Thanks
    1,817
    Thanked 7,115 Times in 5,338 Posts
    Quote Originally Posted by TheEnd View Post
    Yes, it's all down to one wheel speed sensor that gives info for the ABS and ASC, and also tells the car what speed you are doing.

    I forget which one it was that controlled it though.
    NSR
     
     

  6. The Following 2 Users Say Thank You to xXNealXx For This Useful Post:

    Bam Bam (12-08-2010),TheEnd (11-08-2010)

  7. Remove Advertisements
    BimmerForums.co.uk
    Advertisements
     

  8.  
    #4
    Bimmer Fan
    Car Details
    Bam Bam's Car Details
    Model of Car:
    523i SE
    Year of Manufacture:
    1999
    Transmission Type:
    Automatic
    Car Body Type:
    Saloon
    Bam Bam's Avatar
    Join Date
    May 2010
    Location
    NE England
    Posts
    17
    Thanks
    2
    Thanked 9 Times in 8 Posts
    ....brilliant you two, I'll go for the NSR first and see if it clears up.
    Disconnecting the battery for a short while puts everything right but the problems return after 10-15 miles.
    E39 523i SE.
    Alfa Romeo 2L TS GTV.
    Yamaha YP 125 R Scoot.
     
     

  9.  
    #5
    Bimmer Fan
    Car Details
    Bam Bam's Car Details
    Model of Car:
    523i SE
    Year of Manufacture:
    1999
    Transmission Type:
    Automatic
    Car Body Type:
    Saloon
    Bam Bam's Avatar
    Join Date
    May 2010
    Location
    NE England
    Posts
    17
    Thanks
    2
    Thanked 9 Times in 8 Posts
    ....I had the NSR up in the air today with the wheel off. Traced the ABS sensor but as it's never been touched for 12 years it's rock solid, 5 or 6mm allen bolt to remove it but I was either going to snap the bolt head or the allen key. While I was under there I sprayed the bolt with penetrating oil and I'll have another go in a few days.
    I unplugged the electrical connector and it was clean and dry inside, also tapped the senor gently with a spanner and when I switched the engine on all lights illuminated and then went out as they should, still not confident it's fixed as it's an intermittent fault and only time will tell.

    Thanks again for you advice.
    Last edited by Bam Bam; 14-08-2010 at 13:37. Reason: Spelling error.
    E39 523i SE.
    Alfa Romeo 2L TS GTV.
    Yamaha YP 125 R Scoot.
     
     

  10.  
    #6
    Bimmer Fan
    Car Details
    Bam Bam's Car Details
    Model of Car:
    523i SE
    Year of Manufacture:
    1999
    Transmission Type:
    Automatic
    Car Body Type:
    Saloon
    Bam Bam's Avatar
    Join Date
    May 2010
    Location
    NE England
    Posts
    17
    Thanks
    2
    Thanked 9 Times in 8 Posts
    .....so far all is well, done a 25 mile round trip today and no fault lights so far, hope it lasts.
    E39 523i SE.
    Alfa Romeo 2L TS GTV.
    Yamaha YP 125 R Scoot.
     
     

Tags for this Thread

View Tag Cloud

Posting Permissions
  • You may post new threads
  • You may post replies
  • You may not post attachments
  • You may not edit your posts