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Help me diagnose an ABS problem?

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3.1K views 8 replies 4 participants last post by  Pencil  
#1 · (Edited by Moderator)
Hey everyone. I drive a 2001 CR-V EX and unfortunately the ABS has been busted for a couple of years now. I live in a region where we almost never get snow/ice and I never slam on my breaks, so it's never been an issue, but I would like to see if I can figure out exactly what's causing it, and if it's a relatively easy fix, I'd like to get my ABS engaged again.

Backstory: A couple years ago, I started noticing a bit of a vibration when braking, so I went to the Jiffy Lube down the street to get a brake inspection. The tech discovered that my brakes were fine, but the driver's side front CV axle had a massive crack in it. I was like, [Edited Out] that I don't want to drive this car in that condition, please replace the axle if you're able to do that here. And the tech was like yeah, for sure, we can do that no problem. Spoiler alert: it was a problem. I've learned my lesson. Jiffy Lube is for lube only.
The tech did successfully replace my axle and the axle is fine. But after replacing the axle, the tech took the car on a test drive around the parking lot and I heard a pop/snap. After that test drive, any time you're driving at a low-ish speed, like less than 30 mph, and you apply the brakes, the front driver's side brakes make this weird clicking/ticking/grinding sound. It sounds like the ABS is trying to engage when it shouldn't be, it clicks in that same stuttered rhythm as the ABS. The techs tried to figure out what happened but I was like [Edited Out] guys I don't trust you anymore, so I took it to a different mechanic my friend recommended and just asked him to inspect it and make sure my brakes were fine and disconnect my ABS system so it wouldn't click anymore.
So since then, my ABS has been disconnected. But if I reconnect it, it makes that clicking/grinding noise. Anyone have any idea what could be causing this? Wheel speed sensor or something like that?
 
#2 ·
I don't understand why 'hooking up the ABS' with an electrical connector would cause any kind of noise. Is that how you are doing the disconnect?

The ABS works by pulsing the service brakes. It wouldn't happen on just one wheel, in my experience.



I'd be looking at the rotor backing plate, AKA splash shield, on that side. If it got bent during the axle install, it could be rubbing on the rotor and making the noise. (The plates can also bend and contact the rotor if road debris hits it)

I don't see how this would still exist after 2 years, but perhaps a piece of leftover hardware :sneaky: fell into the rotor/splash shield gap.

Someone else needs to verify this, but maybe that one wheel sensor is rubbing on a 'tone wheel', which senses individual wheel speed. I know that Gen2+ cars don't use tone wheels though, they read the wheel bearings directly.

Post back with anything you find.
 
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#3 ·
Yes, my ABS is currently disconnected by separating the electrical connector. As of right now, there is no noise at all from the brakes. But when the ABS is connected, the front driver's side will make that ticking noise when I'm approaching a stop. But it doesn't feel like any of the other brakes are pulsing in that way, it's only the front driver's side. It's weird.

I'll try to take a look at the rotor backing plate. But wouldn't that make a noise regardless of whether the ABS is activated?
 
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