Brake light and P1111 code - Ford Powerstroke Diesel Forum
Powerstroke.org is the premier Diesel Truck Forum on the internet. Registered Users do not see the above ads.
Reply
 
LinkBack Thread Tools Display Modes
  #1  
Old 05-08-2013, 07:27 AM
Premium Member
 

Join Date: Mar 2013
Location: Foresthill CA
Posts: 252
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Brake light and P1111 code

Ok, i have a Genisys EVO but,. that does not mean i know how to use it. While driving, i noticed my dash brake light goes on. Odd, it seems to float at a stop, i.e. not a solid stop.

Ran tests and i get to the screen where you can watch the parking brake light go on and off, when i apply brake, light goes on, when i release it does not always go off. When it is off i rev the engine and apply the brake, light goes on. Any help. I suspect the brake pedal and or e-brake switch but could it be the RABS? I do not have the ABS cable with me, so i can test this weekend.

Also, while running various tests, the buzz test is good, running other DTC scans, i get the P1111 UVC harness. Truck seems to run fine, i plan to disconnect the sensor and use electrical parts cleaner to clean the connector and then some dielectric grease to prevent issues later. Am i wasting my time? What other symptoms should i be getting if the UVC harness is truly bad?
Thank You.
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2  
Old 05-08-2013, 09:36 AM
Premium Member
 

Join Date: Mar 2013
Location: Foresthill CA
Posts: 252
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Anyone able to give me a clue? i am not opposed to begging! LOL
Reply With Quote Quick reply to this message
  #3  
Old 05-08-2013, 11:54 AM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 1,704
Thanks: 0
Thanked 34 Times in 34 Posts
Feedback Score: 0 reviews
Is the ABS light on? If it is only the Brake light, check the fluid lever in the reservoir and if that's good, you may have the vacuum pump heading south (which is what I would suspect). The P1111 code is the "System Pass" code (not a UVCH code). If the UVCH was truly bad, you would have a miss from one or two injectors not functioning or even the whole bank shutting down. Your UVCH is probably OK if it passed the buzz test and the engine runs good. By-the-way, I don't find the green ugly
Cheers!
Reply With Quote Quick reply to this message
  #4  
Old 05-08-2013, 12:18 PM
Premium Member
 

Join Date: Mar 2013
Location: Foresthill CA
Posts: 252
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by Patrick Feeley View Post
Is the ABS light on? If it is only the Brake light, check the fluid lever in the reservoir and if that's good, you may have the vacuum pump heading south (which is what I would suspect). The P1111 code is the "System Pass" code (not a UVCH code). If the UVCH was truly bad, you would have a miss from one or two injectors not functioning or even the whole bank shutting down. Your UVCH is probably OK if it passed the buzz test and the engine runs good. By-the-way, I don't find the green ugly
Cheers!
LOL, no, the green is growing in me.

I will check the items you suggested, and as for the P1111, i guess that is why the EVO says System pass. LOL it just came to me it read that after reading your post.
If the vac pump goes while i am driving, do you suspect i will not stop, or have a hard time? i ask because i am 200 miles from home for the next two three days. I got a heavy duty bumper but it is no good when you hit a smart car. LOL
Reply With Quote Quick reply to this message
  #5  
Old 05-08-2013, 06:51 PM
Premium Member
 

Join Date: Mar 2013
Location: Foresthill CA
Posts: 252
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by Patrick Feeley View Post
Is the ABS light on? If it is only the Brake light, check the fluid lever in the reservoir and if that's good, you may have the vacuum pump heading south (which is what I would suspect). The P1111 code is the "System Pass" code (not a UVCH code). If the UVCH was truly bad, you would have a miss from one or two injectors not functioning or even the whole bank shutting down. Your UVCH is probably OK if it passed the buzz test and the engine runs good. By-the-way, I don't find the green ugly
Cheers!
Patrick, Do you know what vacuum i should have if i were to test the vacuum pump with a gauge? I have an EVO but not sure if it tests that or not. Will run it in the AM. I plan to buy a vac gauge tomorrow and work on this at work. I am currently over 100 miles from home where all my tools and equipment are and ford is booked. Really not looking forward to crossing the SF bay bridge with no power brakes again. LOL
Reply With Quote Quick reply to this message
  #6  
Old 05-08-2013, 07:20 PM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 1,704
Thanks: 0
Thanked 34 Times in 34 Posts
Feedback Score: 0 reviews
It's 17-21 in-Hg when running at normal operating temperature. Cheers!
Reply With Quote Quick reply to this message
  #7  
Old 05-08-2013, 07:48 PM
Premium Member
 

Join Date: Mar 2013
Location: Foresthill CA
Posts: 252
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by Patrick Feeley View Post
It's 17-21 in-Hg when running at normal operating temperature. Cheers!
I will buy the gauge and test in the morning but, i found something interesting, maybe you or someone else could tell me if it is something.

With the Genisys Evo running custom datastream and set to focus on the following
1) Brake Pedal Position
2) Brake pedal Press Applied sw
3) Park brake apply sw
I am sitting at idle, gear in park engine warm. Here is the action and the response

1) apply brake pedal, changes from on to off etc, seems to function
2) stays in off position no matter what i do. press the brake, set e-brake, no affect
3) this stays on no matter weather the e-brake is applied or not.

I removed the e-brake switch, seems very simple. I am no electrician but, it appears this ground to body, when the brake is applied the ground is broke and a light goes on. My light stays on. I put an ohm meter across the ground plate and the connector, meter starts at 0.2 with leads crossed, reads same when i touch the ground plate and the connector. when i engage the switch meter goes to OL. seems to me the switch is working. Can anyone tell me, first, why my park brake apply sw stays on, and two would this cause the hard pedal press and little brake power?

Per the Factory test procedure, the parking brake applied is one issue, so iif my switch is lying to the computer, maybe i found a cheap fix, if only the switch were bad.

Please help!
Reply With Quote Quick reply to this message
  #8  
Old 05-09-2013, 10:44 AM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 1,704
Thanks: 0
Thanked 34 Times in 34 Posts
Feedback Score: 0 reviews
If I recall correctly, when the parking brake is applied the switch should close and provide the path to ground (and illuminating the light). I had my $12 AIC ground circuit wired into the wiring for the switch so that it only worked with the parking brake applied. The switch should have nothing to do with the hard pedal and little brake power (that's usually the vacuum pump). Cheers!
Reply With Quote Quick reply to this message
  #9  
Old 05-09-2013, 11:25 AM
Premium Member
 

Join Date: Mar 2013
Location: Foresthill CA
Posts: 252
Thanks: 0
Thanked 0 Times in 0 Posts
Feedback Score: 0 reviews
Quote:
Originally Posted by Patrick Feeley View Post
If I recall correctly, when the parking brake is applied the switch should close and provide the path to ground (and illuminating the light). I had my $12 AIC ground circuit wired into the wiring for the switch so that it only worked with the parking brake applied. The switch should have nothing to do with the hard pedal and little brake power (that's usually the vacuum pump). Cheers!
Patrick, please answer this for me. There is a vac hose coming from the pimp going to the low vac switch. Do i disconnect it there and connect a vac gauge to test? According to the factory manual test sheet, there is a low vac switch, how would I test that? Tnanks for your help, 2 hours until I have to drive home, ugh. Lol

Sent from AutoGuide.com Free App
Reply With Quote Quick reply to this message
  #10  
Old 05-10-2013, 10:58 AM
Compression Ignition Addict
 

Join Date: Oct 2011
Location: Tehachapi, CA
Posts: 1,704
Thanks: 0
Thanked 34 Times in 34 Posts
Feedback Score: 0 reviews
Probably saw this too late for you, but I would say connect the gauge to any connection you can disconnect on the vacuum manifold or near the pump. As far as testing the switch, I'll have to look when I get home (where the manuals are). Cheers!
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Ford Powerstroke Diesel Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.
User Name:
If you do not want to register, fill this field only and the name will be used as user name for your post.
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.



Thread Tools
Display Modes

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 01:47 PM.


Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.6.1
Garage Plus, Vendor Tools vBulletin Plugins by Drive Thru Online, Inc.

vB.Sponsors