ABS Light on Regen Brakes Disabled with 3 codes, HELP! - Page 3 - GreenHybrid - Hybrid Cars


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  #21  
Old 06-22-2018, 03:56 PM
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Default Re: ABS Light on Regen Brakes Disabled with 3 codes, HELP!

Quote:
Originally Posted by Lois0697 View Post
I did see that link, but I'm embarrassed to say I can't really see the ground points as shown in the first and fourth diagrams when I look at my car (o8 FEH). Are both under/behind/around the ABS/HCU assembly near the passenger side?








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  #22  
Old 06-22-2018, 04:10 PM
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Default Re: ABS Light on Regen Brakes Disabled with 3 codes, HELP!

Hopefully, someone who actually performed the task them self will chime in. You probably have seen this already but just in case you didn't, it may help. 1) Originally Posted by Hackman
I had the problem of no brakes. Cleaned all the ground connections from battery to the frame. I have had no problems in the last 2 years. 1 under the battery 1 behind the front wheel and 1 on passenger side firewall.
Has anyone else tried my solution? I had the car for three years after the fix and had no issues. I think when a new hcu is installed, a secure ground connection is reestablished, that is why the replacement seems to work.

Good luck!
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  #23  
Old 06-22-2018, 05:55 PM
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Default Re: ABS Light on Regen Brakes Disabled with 3 codes, HELP!

Mine is a 2008 also and I gather from the PDF that the 05-07 grounds may be in slightly different locations?.

The ground wires are on the right frame rail of the body as the PDF suggests - Top Picture. There are stud-post bolts that are attached to the rail. The HCU bracket mounts with these studs and nuts are then fastened. Then the two original ground wires are attached and another set of nuts fastened. I thought I had taken some pictures, but I cannot find them.

Problem is that both must really be done from underneath the vehicle. If you lean over the engine and look straight down under the black cylindrical body off the HCU (the pump motor), you should see the top ground wire. Might be able to finesse from above, but I doubt it. The bottom ground is about 6 inches lower and about 6 inches back towards the firewall.

I replaced the grounds with the kit I mentioned in a post above. I think it also had some teethed washers to help "bite" the metal on the washers and nuts.

If you don't have a way to do it yourself, I think you could take it to about any garage with a lift and a mechanic should be able to see and clean them. It shouldn't take more than an hour shop time in my opinion.

Good Luck!

Last edited by LonnieU; 06-22-2018 at 07:16 PM.
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  #24  
Old 06-23-2018, 09:01 PM
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Default Re: ABS Light on Regen Brakes Disabled with 3 codes, HELP!

This shows the entire HCU mounting. The ground wires are items 13. I thought the studs were mounted in the rail, but they are actually bolts with another threaded extension to accept the ground wires.


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  #25  
Old 07-11-2018, 04:44 PM
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Default Re: ABS Light on Regen Brakes Disabled with 3 codes, HELP!

Thanks for all the replies on the grounds!!!

My 2008 (126K) has been making the HCU noise periodically (including one 'check brake system' notice) over the past few months (I had the rear pads replaced at a Ford Quicklane in December), and I am considering a flush/bleed as a preventative measure. So is a bleed/flush something that should be done after brake pad replacement? Also, does this have to be done at a dealership as the manual implies?

Thanks!

Last edited by tommyball; 07-11-2018 at 04:57 PM.
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  #26  
Old 07-11-2018, 05:59 PM
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Default Re: ABS Light on Regen Brakes Disabled with 3 codes, HELP!

If the hydraulic brake system was not "opened" to allow any air in, I wouldn't think you would need to bleed the system. But if the fluid has never been changed, it's more than passed time to do it.

Doesn't have to be done by a dealership.

Lois0697's post #12 in this same thread is a "electronic" way to do it.

I have done it with a pump up pressure bleeder at around 20 PSI and the battery unhooked.

I have the Ford Service manual for the 2008 year and the official procedure is a combination of their ETIS service computer with a pressure bleeder.
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