Join Date: 23rd March 2019
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Check System - ABS and VSA warning lights
I'm new here, first post and hoping you guys havethe expertise to point me in the right direction.
I've got an 8th Gen 1.4L Honda Civic, 2007 reg,~94,000 miles.
A couple of weeks ago the ABS and VSA warninglights came on shortly after starting the engine. I pulled over, engine off andon again, lights didn't come back. Was fine for a few weeks but now theABS and VSA lights come on when the engine is running, either immediately orafter driving a couple of meters.
I've done some research and got an OBD2 readerwith ABS. There are no engine fault codes and no fault codes being shown underthe ABS on the reader, but lights still on.
I've checked all 4 wheel sensors with the OBD2live stream, all 4 showing up and showing realistic movement with all 4 wheelsshowing very similar readings. The ABS Pump reading says 'STOP' and my partnersays she didn't see it change during the emergency stop when we could feel the ABSkicking in. Not sure if that is a problem...
I've checked the VSA fuse under the bonnet, looksfine and continuity check with multi-meter is fine. I've done the samewith the ABS fuse under the steering wheel, again looks fine andcontinuity check is fine.
I've checked the brake fluid level, all fine.
I've tested the braking with a couple of emergencystops and the ABS kicks in, I feel the juddering of it and no loss of controlof the car etc so that seems fine. As it is working that suggest to methat the ABS modulator is working.
I'm pretty much out of ideas. I don't want to takeit to Honda just yet as I'm afraid they are going to say it is the modulatorand that is over £1,000 just for the part on Lings Honda. That is as muchas I know about the ABS and VSA systems. I did wonder about the YAWsensor if that was involved but that reads fine. The OBD2 reader does showthe Longitudal Acceleration Sensor as 0 when moving, so wondering if thatsensor has failed and if that would show as ABS VSA fault?
Any advice on what to check next or if the answeris already in the test results (but I'm not knowledgeable enough to know it)would be greatly appreciated.
Thanks in advance, Martin.