ABS Light
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ABS Light
I have a 1998 Volvo S70 GLT. My ABS light comes on once in a while and then shuts off. The local mechanic ran the codes and nothing came up. Does Volvo have a special ABS code reader, do I have to go to the dealer? What can I do to troubleshoot the problem before I go to the dealer?
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RE: ABS Light
I will tell you from my experiance that the module is most likely bad. Try to get the codes red when the light is on. I will bet that a code for the R/R sensor will come up and a pump motor code.
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RE: ABS Light
Are you referring to the ABS Control Unit (Module?)? From my research, I have found that the control module failing is the most common problem. Is there a way for a Volvo Dealer to get the code if the ABS light is on randomly? I found a site that sells refurbished units for under $200 while a new unit is around $500.
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Thread Starter
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RE: ABS Light
Okay, I just did my brakes with new rotors and pads all around. I used my compressor to clean around the entire wheel assemblies and made every effort to clear debri from the ABS wheel sensors with the air. My ABS light has not come back on in 2 days and the ABS system seems to work fine when I did some high speed panic stops and low speed loose sand (we have a lot of that here in 29 Palms, CA) stops.
Could a dirty sensor have been the cause of the light coming on?
Could a dirty sensor have been the cause of the light coming on?
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RE: ABS Light
I have the same problem with my 98 t5. I had a repair shop read the codes and it came back as a problem with the rear wheel sensors. However, 99% of what I've researched says it is the ABS unit which tends to crack due to aging. Lately it seems like on rainy or wet days I get no lights until I drive for an extended period. I figure the engine heat dries off the board. with moisture present I figure there is better conductivity which overcomes the mini cracks that may be present. this is all a calculated guess but before winter I want the trac control to work and I'm gonna have my mechanic replace the unit and disregard the code. If I had a place and better mechanical skills I would try and do it myself but everytime I perform a do it your selfer...I wish I hadn't. thats just me though
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From: Orlando, Florida
RE: ABS Light
ORIGINAL: lenniefoug
I have the same problem with my 98 t5. I had a repair shop read the codes and it came back as a problem with the rear wheel sensors. However, 99% of what I've researched says it is the ABS unit which tends to crack due to aging. Lately it seems like on rainy or wet days I get no lights until I drive for an extended period. I figure the engine heat dries off the board. with moisture present I figure there is better conductivity which overcomes the mini cracks that may be present. this is all a calculated guess but before winter I want the trac control to work and I'm gonna have my mechanic replace the unit and disregard the code. If I had a place and better mechanical skills I would try and do it myself but everytime I perform a do it your selfer...I wish I hadn't. thats just me though
I have the same problem with my 98 t5. I had a repair shop read the codes and it came back as a problem with the rear wheel sensors. However, 99% of what I've researched says it is the ABS unit which tends to crack due to aging. Lately it seems like on rainy or wet days I get no lights until I drive for an extended period. I figure the engine heat dries off the board. with moisture present I figure there is better conductivity which overcomes the mini cracks that may be present. this is all a calculated guess but before winter I want the trac control to work and I'm gonna have my mechanic replace the unit and disregard the code. If I had a place and better mechanical skills I would try and do it myself but everytime I perform a do it your selfer...I wish I hadn't. thats just me though
http://home.earthlink.net/~vicrocha/...vo_V70_ABS.htm
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RE: ABS Light
Tech,
You were correct, the problem did not go away. Just after my last post the ABS light came back on. I decided to replace the ABS Control Unit with a rebuilt one and the problem is gone. The ABS worked with the old unit, but I noticed much more aggressive ABS braking after the replacement and the ABS light has not come on since. I found a rebuilt unit from Volvo Parts Direct (do a search for brake parts for your year and model car) for $181.76 (shipping included). I was a little concerned with ordering the "Programa" unit, but when it came (in 2 days) it was a rebuilt OEM Volvo ABS Control Unit (ATE). The install was easy, I used the instruction from a Volvo ABS Control Unit rebuild site. Thanks for the help.
You were correct, the problem did not go away. Just after my last post the ABS light came back on. I decided to replace the ABS Control Unit with a rebuilt one and the problem is gone. The ABS worked with the old unit, but I noticed much more aggressive ABS braking after the replacement and the ABS light has not come on since. I found a rebuilt unit from Volvo Parts Direct (do a search for brake parts for your year and model car) for $181.76 (shipping included). I was a little concerned with ordering the "Programa" unit, but when it came (in 2 days) it was a rebuilt OEM Volvo ABS Control Unit (ATE). The install was easy, I used the instruction from a Volvo ABS Control Unit rebuild site. Thanks for the help.
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Thread Starter
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RE: ABS Light
Good info, but the rebuilt ABS module from Volvo Parts Direct was about $185 plus a $100 core charge. This site is charging $269, plus a $100 core charge. Not sure if they are talking Canadian or U.S. dollars, but with the current rate it is still more expensive from http://www.absmodules.ca. I wanted to find out where alecw81 found the $95 module.