Laguna II - ABS not working but no warning lights ? - Page 7 - Renault Forums :: Independent Renault forum

Brakes/Hubs Brakes, Hubs, and etc

 1Likes
Reply
 
LinkBack Thread Tools Display Modes
post #31 of 82 (permalink) Old 27th November 2011 Thread Starter
TTT
Platinum member
Technical Supremo
Threadstarter
 
TTT's Avatar
 
Join Date: Jun 2008
Posts: 1,985
Nominated 3 Times in 7 Posts
Nominated TOTW/F/M Award(s): 4
Thanks: 199
Thanked 399 Times in 348 Posts
Re: Laguna II - ABS not working but no warning lights ?

Quote:
Originally Posted by TTT View Post
....Removed the front bumper, there's details on the forum of where the bolts are located....
The link below opens a pdf that gives details of bumper removal. (Thanks to the original author of the pdf.)

http://dafranze.homeunix.com/webspac...ghts-xenon.pdf



Cheers.
Currently in TTT's garage:
2001 Renault Laguna II 1.9dCi Dynamique Sport Tourer
TTT is offline  
Sponsored Links
Advertisement
 
post #32 of 82 (permalink) Old 27th November 2011
Member
 
trickyd400's Avatar
 
Join Date: Oct 2011
Posts: 48
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 4
Thanked 4 Times in 4 Posts
Re: Laguna II - ABS not working but no warning lights ?

Thanks for your help TTT, I've got the front bumper off with help of the .pdf guide you mentioned. I did have a problem with the o/s bumper bolt that also holds the wing on that snapped off. I have drilled it out and destroted the threads, I will try and re-tap the hole or even use a helicoil, alternatively I may see if I can use a plastic trim clip, (but I guess it may not be strong enough) The reason the bolt was rusted solid and subsequently snapped off was due to the under wing liner having been split in a previous operation. This is a warning to anyone who has this problem... (see picture)
Taken a picture of my ABS pump to record the numbers:

Then I broke off the retaining tabs on one of the fog light connectors... Why oh why is every connector a different design????!!!!

The lever that holds the blue ABS plug on was not moving so I gently rocked it back and forth with a spray of WD40 which worked, connector contacts looked clean.

Next step is to get a replacement pump. Watch this space
Attached Thumbnails
Click image for larger version

Name:	IMAG0246.jpg
Views:	231
Size:	57.4 KB
ID:	14579   Click image for larger version

Name:	IMAG0251.jpg
Views:	201
Size:	33.4 KB
ID:	14581   Click image for larger version

Name:	IMAG0247.jpg
Views:	204
Size:	42.6 KB
ID:	14582   Click image for larger version

Name:	IMAG0249.jpg
Views:	214
Size:	68.5 KB
ID:	14583   Click image for larger version

Name:	IMAG0236.jpg
Views:	200
Size:	33.0 KB
ID:	14584   Click image for larger version

Name:	IMAG0211.jpg
Views:	190
Size:	71.7 KB
ID:	14585   Click image for larger version

Name:	IMAG0214.jpg
Views:	186
Size:	51.1 KB
ID:	14586  
Currently in trickyd400's garage:
2001 Renault Laguna II 1.9dCi Dynamique Estate, Ford Fiesta Mk6 1.25 Style, CBR400RR, Beta Zero Gara- now stolen!!! GRRRR!!
trickyd400 is offline  
post #33 of 82 (permalink) Old 27th November 2011 Thread Starter
TTT
Platinum member
Technical Supremo
Threadstarter
 
TTT's Avatar
 
Join Date: Jun 2008
Posts: 1,985
Nominated 3 Times in 7 Posts
Nominated TOTW/F/M Award(s): 4
Thanks: 199
Thanked 399 Times in 348 Posts
Lightbulb Re: Laguna II - ABS not working but no warning lights ?

Good stuff, nice to see that you got some decent pictures, I must track down our camera for next time.

The snapped bolt you mention was also snapped off on mine, to be honest I think the bumper stays in place ok without it.

You're right about the different types of connectors, it's a pain trying to figure out which tab to press to release them, especially when you cant always get good access to them.
I'm sure you will be able to improvise a locking system for your broken fog light connector with a cable tie or two.

From what I have been reading about ABS pump failures it seems to be that the fault is almost always a poor solder joint inside the ECU part of the pump. Looking at the pump it's quite easy to remove the ECU, it may be a lot easier just to remove this and replace it with the one from the replacement pump, this would save having to disturb the brake pipes and the fluid loss etc,.

The 2 Torx bolts visible on the motor side of the pump hold the ECU in place, there's a hole in the bracket to get to the bottom one.

I'll pull the ECU off my old pump tomorrow to see whats involved, I'll find the camera before I do tho.

Cheers.
Currently in TTT's garage:
2001 Renault Laguna II 1.9dCi Dynamique Sport Tourer
TTT is offline  
 
post #34 of 82 (permalink) Old 27th November 2011
Member
 
trickyd400's Avatar
 
Join Date: Oct 2011
Posts: 48
Nominated 0 Times in 0 Posts
TOTW/F/M Award(s): 0
Thanks: 4
Thanked 4 Times in 4 Posts
Lightbulb Re: Laguna II - ABS not working but no warning lights ?

I'll definitely give that a go, I am all for repairing what you have rather than throwing components and money at a problem.
Currently in trickyd400's garage:
2001 Renault Laguna II 1.9dCi Dynamique Estate, Ford Fiesta Mk6 1.25 Style, CBR400RR, Beta Zero Gara- now stolen!!! GRRRR!!
trickyd400 is offline  
post #35 of 82 (permalink) Old 28th November 2011 Thread Starter
TTT
Platinum member
Technical Supremo
Threadstarter
 
TTT's Avatar
 
Join Date: Jun 2008
Posts: 1,985
Nominated 3 Times in 7 Posts
Nominated TOTW/F/M Award(s): 4
Thanks: 199
Thanked 399 Times in 348 Posts
Re: Laguna II - ABS not working but no warning lights ?

Hi,
Ok I got a chance to take a look at my old pump today, I stripped it down to see if I could see any obvious reason why it had stopped working.


Old pump





The bolts that hold the pump together





With the bolts removed the ECU just pulls away

Make sure the ECU is pulled off squarely so as not to damage the prong that sticks out from it.





The ECU showing the prong





Close up of the ECU numbers





Close up of the ECU Solenoids





Back of the valve block





Motor side of the valve block

The motor just pulls off the valve block.





Motor power connections

The prong from the ECU passes through a hole in the valve block to connect with the motor connections (circled)




I tested the motor by applying 12v to the connection, it burst into life so there's no problem with that.

There's nothing really that can go wrong with the valve block, I suppose the valves inside could be jammed but I think the problem is more likely to be with the ECU, So time to get into the ECU.

I used a Dremel type tool to cut open the ECU, you could just as easily use a hacksaw.



Cut round the edge of the ECU





The ECU with the cover removed





Close up of the PCB





Super close up of the pin connections




After inspecting the PCB closely with a magnifying glass I can't see anything obvious, the only thing that looks suspect to me is the pin connections. These are the backs of the pins that the multi plug connects to, they look like that have just been pressed through the holes in the PCB. The pins seem to be a split design, you can see this in the photo above.
I think I can see some solder on them but it only seems to be a tiny amount and in two places on each pin where it passes through the hole, surely there is more solder than this on each pin ?

Are the pins soldered from the other side of the board ?

I've never seen through hole connections like this before, I would have expected them to be fully soldered to the solder ring on the board.

I hope someone who has seen connections like this before can advise, it would be nice to think that all that was required to fix the ECU was a dab of solder on each pin.

I did check continuity of some of the pin connection to the PCB with a multimeter, the pins I checked are making a contact, but that's in the house at room temperature, maybe when the PCB is cooler and there is voltage present the connections could be failing.


Cheers.
Currently in TTT's garage:
2001 Renault Laguna II 1.9dCi Dynamique Sport Tourer

Last edited by TTT; 28th November 2011 at 05:24 PM.
TTT is offline  
Reply

Tags
abs , laguna , lights , warning , working

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Renault Forums :: Independent Renault 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:
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:
OR

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
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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

 
For the best viewing experience please update your browser to Google Chrome