Weird Service ABS issue
Thread Starter
Race Director
Joined: Oct 2011
Posts: 16,085
Likes: 819
From: Dallas Texas
2025 C4 of the Year Finalist - Modified
Weird Service ABS issue
It only comes on when I floor it at speeds below 30mph, sometimes, not all the time. Got a code H83 in module 9. Brake fluid isn't low. If I pull over and turn it off, the service ABS light stays off. Any ideas why it happens? The FSM basically said to check for low fluid.
Team Owner
Joined: Sep 2003
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I believe the FSM has suggestions for the code 83 and the first move is to check electrical connections. I'd think there should be a couple of pages of diagnostics to do "FIRST". You say it ain't low, the code is a H - HISTORY not active so I'd think the FSM and the diagnostics are the next move.
The diagnostics are pretty straight forward appearing and it ain't asking for any specialty diagnostic devices like a Tech1 OR scanner of any sort ...
Go back to your FSM ...
Post back!!!
The diagnostics are pretty straight forward appearing and it ain't asking for any specialty diagnostic devices like a Tech1 OR scanner of any sort ...
Go back to your FSM ...
Post back!!!
Thread Starter
Race Director
Joined: Oct 2011
Posts: 16,085
Likes: 819
From: Dallas Texas
2025 C4 of the Year Finalist - Modified
I had this light come on 3 weeks ago. But after putting gas, it stayed off, so I didn't think much of it. Now that it came back, I'm gonna go after it. Sucks because it doesn't happen all the time. So I'll have to get the light to come on again. Will report back.
Thread Starter
Race Director
Joined: Oct 2011
Posts: 16,085
Likes: 819
From: Dallas Texas
2025 C4 of the Year Finalist - Modified
OK. Measured the ohms on the brake fluid level switch. FSM says if below 5 ohms, replace switch. It's really hard to get my probes in there. I was able to just barely get them in for a second, and saw 3.91 ohms on my meter. But it went back to 1 really fast, as it is super tight in there, hard to get the ohms on that switch.
Thread Starter
Race Director
Joined: Oct 2011
Posts: 16,085
Likes: 819
From: Dallas Texas
2025 C4 of the Year Finalist - Modified
Forgot to add, I took the switch out yesterday. Didn't realize how easy it comes out. Anyways, I could actually see where my probes were pointing. I got them on the switch connectors, but I wasn't getting a reading on my multimeter. Yes, I do know how to measure for ohms
Bad switch? Ohmed another sensor and I did get a reading, so I know my meter is good.
Bad switch? Ohmed another sensor and I did get a reading, so I know my meter is good.
Team Owner
Joined: Sep 2003
Posts: 25,381
Likes: 2,736
Forgot to add, I took the switch out yesterday. Didn't realize how easy it comes out. Anyways, I could actually see where my probes were pointing. I got them on the switch connectors, but I wasn't getting a reading on my multimeter. Yes, I do know how to measure for ohms Bad switch? Ohmed another sensor and I did get a reading, so I know my meter is good.
Bad switch? Ohmed another sensor and I did get a reading, so I know my meter is good.Second down in this link:
http://www.createforless.com/buying-...and-sizes.aspx
The last 25 I bought were maybe 60¢
Last edited by WVZR-1; Apr 25, 2016 at 04:11 PM.
Thread Starter
Race Director
Joined: Oct 2011
Posts: 16,085
Likes: 819
From: Dallas Texas
2025 C4 of the Year Finalist - Modified
Been a while
So it stopped doing it for a while, then came back. But only when when I went WOT. Brake fluid was JUST below the max level. Filled it up about two, or three weeks ago. And have done many WOT runs, and so far, no service abs light 
Let's hope it stays that way.
So it stopped doing it for a while, then came back. But only when when I went WOT. Brake fluid was JUST below the max level. Filled it up about two, or three weeks ago. And have done many WOT runs, and so far, no service abs light Let's hope it stays that way.
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