Brucet
07-05-2007, 05:14 PM
Hi Forum,
After lurking through miles of threads over the past 2 years relating to ABS light on, intermittent ABS light, ABS light on after 5 to 15 minutes of driving, etc., and weighing the comments I decided to replace the pedal travel sensor (AKA Way sensor part number 34 33 1 182 594 appx. $120) AND GUESS WHAT FIVE MINUTES LATER.. FIXED! I have a 92 325i and checked the build date for the problem rear wheel speed sensors… no joy. The PO had replaced the ABS unit.. no joy. When you think about it, the way sensor is the only part (outside of the valves in the ABS unit itself) that gets a frillion cycles on it and could conceivably wear out over time (200215 miles)! This isn’t covered in Bentley’s or the ETK and I couldn’t find a test for it either. I hope to get some time to dissect the sensor and see what’s up with it and report my findings… it appears to be a variable resistor with a plunger drive which could certainly wear with use to the point that temperature or movement would cause it to either open up or grossly change resistance value. The other big clue is that the stealer stocks these things things like crazy so it’s like they know something we don’t. And yes I had the codes pulled and got the typical variety of results from can’t communicate with ABS computer to wheel speed sensor. The coin toss to me was spending $100 a pop for wheel speed sensors or $120 with BMWCCA discount and deciding if that didn’t get it… uhhh… well… track drivers disable the ABS anyway and so be it!
Good Luck
Bruce:alright
After lurking through miles of threads over the past 2 years relating to ABS light on, intermittent ABS light, ABS light on after 5 to 15 minutes of driving, etc., and weighing the comments I decided to replace the pedal travel sensor (AKA Way sensor part number 34 33 1 182 594 appx. $120) AND GUESS WHAT FIVE MINUTES LATER.. FIXED! I have a 92 325i and checked the build date for the problem rear wheel speed sensors… no joy. The PO had replaced the ABS unit.. no joy. When you think about it, the way sensor is the only part (outside of the valves in the ABS unit itself) that gets a frillion cycles on it and could conceivably wear out over time (200215 miles)! This isn’t covered in Bentley’s or the ETK and I couldn’t find a test for it either. I hope to get some time to dissect the sensor and see what’s up with it and report my findings… it appears to be a variable resistor with a plunger drive which could certainly wear with use to the point that temperature or movement would cause it to either open up or grossly change resistance value. The other big clue is that the stealer stocks these things things like crazy so it’s like they know something we don’t. And yes I had the codes pulled and got the typical variety of results from can’t communicate with ABS computer to wheel speed sensor. The coin toss to me was spending $100 a pop for wheel speed sensors or $120 with BMWCCA discount and deciding if that didn’t get it… uhhh… well… track drivers disable the ABS anyway and so be it!
Good Luck
Bruce:alright