ABS WARNING LIGHT STAYS ON INTERMITTANTLY,SOMETIMES WORKS CORRECTLY FOR MONTHS.
ABS light comes on with ignition then should go off when you start the car.
If abs sensor does not turn off after disconnecting the battery, then
there is a real problem, a faulty sensor or ABS malfunctioning.
When the ABS led comes on immediately after you start the car and stays on usually is one of the relays.
The main one is called surge arrester relay, if it is faulty usually there have been an
overvoltage.
There should be two more, usually located behind the black plastic cover of the ABS.
Testing and changing the faulty relay can fix the problem.
If light turns off on startup, and comes back on when you reach some
speed, usually you need to check the wheel sensors. You test them
unplugging the sensor located behind the wheel and testing it for
continuity with a multimeter.
Use Haynes manual to find locations and specs of relays.
Contact a qualified mechanic if you cannot fix it yourself, problems with ABS may compromise safety of the vehicle.
Be very careful of BBA-Reman and other web rebuilders. Yes, they will replace parts inside your computer, but if this does not solve the problem you're simply out the money. They warn you about this on their website and Ebay store. The thing that really sucks about the Volvo system is that you can fail the ABS computer, or the pump, or one(or more) wheel sensors, and the system won't generate any trouble codes. That translates into $$ spent at a repair shop, while they experiment just like you would at home. Listen to Ginko. Test your wheel sensors one by one. Rebuild/replace the module as the last step in the chain. Take it from one who spent lots of money on so-called experts who did little more than check-and-replace until the problem went away.
I had the same problem. Undid the rear ABS connectors, cleaned them, added some WD40 and no problems now for three years. It's a while ago now but I think I had to get access to one of the connectors through the rear under the spare wheel area.
Regds,
Dave
Volvo has lots of issues with this. If you have a speed sensor code for the right rear wheel speed sensor that keeps coming on, then you need a computer. New or quality reman is available.
35 years working on Volvo's professionally.
Its most likely the ABS Control Module. It can be rebuilt at BBA-Reman. Just Google BBA.
ABS LIGHT AND MODULE TROUBLESHOOTING:
Anti
lock brake system light comes up when there is issue with car brake systems. It
can be low brake fluid or faulty ABS fuse or its issue with brake system or assembly.
Your vehicles brake system needs inspection.
To
troubleshoot these issues, I suggest you to refer the help links provided below.
There are direct links with accurate solution, for these specific issues.
Click
the link below and follow the procedure: ------
http://howtobyme.blogspot.com/2011/11/abs-and-service-light-comes-on.html
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http://howtobyme.blogspot.com/2011/11/abs-light-stays-on-but-brakes-work-fine.html
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http://schematicsdiagram.blogspot.com/2011/06/abs-and-traction-control-lights-stays.html
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http://howtobyme.blogspot.com/2011/11/abs-brake-lights-warning-indicator.html
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http://whoisbyme.blogspot.in/2012/07/battery-light-and-abs-light-on-dash.html
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http://technoanswers.blogspot.com/2011/11/how-anti-lock-brakes-work.html
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http://technoanswers.blogspot.com/2011/11/brake-system-troubleshooting.html
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http://technoanswers.blogspot.com/2012/01/anti-lock-brake-light-stays-on-all-time.html
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ABS
light comes on and Car makes Grinding noise?
http://repairhelpcenter.blogspot.com/2012/01/abs-light-comes-on-and-car-makes.html
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http://repairhelpcenter.blogspot.com/2011/11/abs-trouble-codes-for-all-1994-00-acura.html
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http://technoanswers.blogspot.in/2012/05/2008-toyota-highlander-abs-warning.html
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http://technoanswers.blogspot.in/2012/04/2003-lexus-es-vsc-trac-off-abs-lights.html
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http://technoanswers.blogspot.in/2012/04/2008-toyota-highlander-hybrid-warning.html
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http://schematicsdiagram.blogspot.com/2011/12/abs-brake-warning-lights-remains-steady.html
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http://schematicsdiagram.blogspot.in/2012/02/can-i-drive-car-without-abs-fuse.html
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http://schematicsdiagram.blogspot.com/2011/12/where-is-abstcs-module-located-on-2005.html
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http://schematicsdiagram.blogspot.com/2012/01/abs-motor-keeps-running.html
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http://howtobyme.blogspot.com/2011/12/when-car-stopsabs-pump-turns-on.html
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http://technoanswers.blogspot.in/2012/02/replacing-abs-unit-on-buick-century.html
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http://technoanswers.blogspot.in/2012/04/toyota-camry-premature-abs-actuation.html
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How to replace ABS Modulator Control
Unit on Acura Integra?
http://repairhelpcenter.blogspot.in/2011/11/how-to-replace-abs-modulator-control.html
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How to replace ABS Pump Assembly on
Acura Integra?
http://repairhelpcenter.blogspot.in/2011/11/how-to-replace-abs-pump-assembly-on.html
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How to remove ABS Accumulator on
Acura Integra?
http://repairhelpcenter.blogspot.in/2011/11/how-to-remove-abs-accumulator-on-acura.html
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How to remove ABS Control Unit on
Acura Integra?
http://repairhelpcenter.blogspot.in/2011/11/how-to-remove-abs-control-unit-on-acura.html
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These details will help.
Thanks.
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my abs light comes on and the trac says off
Hello : my new/old volvo 1997, 940 is great but : one problem!!!!!!!!
ABS : warning light stays on during first drive of the day ; next drive a bit later it stops a few moments after starting.
and no sounds or feelings that the system is starting to be alert.
In holland it is APK disaproval!!!!!
It worries me ; any tips??
Bert
ABS light on constantly and brake warning light intermittently. Garage want 450 pounds for sensor and can't guarantee it will resolve.
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