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E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #1  
Old 06-27-2012, 11:43 AM
nevada458 nevada458 is offline
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Location: minnesota
 
Join Date: Jun 2012
Posts: 6
Mein Auto: 540i
Brake and abs warning on 2000 540i

Having trouble finding the cause of my brake and abs warnings. Have tried tests on other threads and here's what I get:

no sensors respond to the diode test on my meter, all read open loop

the front sensors read high mega ohm resistance in one direction only

the rear sensors read infinite resistance in both directions

the front left sensor when removed disables cruise control

the rear driver side sensor when removed disables the speedometer.

I'm thinking all the sensors are good and the module is bad. Any one have any ideas?
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  #2  
Old 06-27-2012, 08:37 PM
Silver540i6 Silver540i6 is offline
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Location: Seneca, SC
 
Join Date: Mar 2012
Posts: 187
Mein Auto: BMW 540i/6
Sounds like the module to me. I did all the test that you are describing above on mine, and came up with the same results. My module is bad and needs replacing. I think you can have them rebuilt for a lot cheaper than you can buy one.
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1998 BMW 540i/6 Sport...18" Staggered M Pars, Angel Eye Upgrade, Muffler/Resonator delete, iPod integration kit
1970 Dodge Challenger R/T SE...440 six pack, slap shift...blows away all e39s
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  #3  
Old 06-27-2012, 10:46 PM
edjack edjack is offline
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Location: San Jose, CA
 
Join Date: May 2007
Posts: 6,725
Mein Auto: '97 540i 6 speed
Module Master.
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Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.
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  #4  
Old 06-29-2012, 08:14 AM
nevada458 nevada458 is offline
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Location: minnesota
 
Join Date: Jun 2012
Posts: 6
Mein Auto: 540i
Re-checked all the sensors and I must have missed the right front. It's shorted. I'll try a $18 ebay cheapo first.
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