Seat ECU repairs for DrDread - Defender Source
Defender Source  

Go Back   Defender Source > Build-up's, Projects & Registry Profiles > Smaller Projects


Reply
 
Thread Tools
  #1  
Old September 16th, 2015, 08:56 AM
o2batsea's Avatar
o2batsea
Status: Online
Bill Adams
66 109 sw 94 lwb
Member
 
Join Date: Jul 2009
Location: kensington md
Posts: 6,505
Registry
Seat ECU repairs for DrDread

Board restoration in progress. When I recieved it, it was pretty much encrusted in blue corrosion. Someone tried to clean it up using a scraping tool and did a lot of damage. I cleaned it chemically which helped reveal the extent of the damage. It wasn't pretty.
I reconnected the broken traces. Removed the integrated circuit near the battery as some of the busted traces were underneath. There are three breaks. One there in the middle you can see easily, then another just to the right and the third just above between the resistor and the IC holes. I will install a socket for the ICs so that they can be removed easily. Next step is to epoxy seal the card and install the missing parts.
You can also see there's a bad trace for the battery leg (the wider one) there near the black capacitor . I'm going to have to reroute that under the board with a jumper wire. The ground leg hole (center of pic) has some damage but I think it'll solder up OK. All in all not as bad as I've seen, but still a challenge. I'm using parts from two boards to make one good one. Super fiddly work bending the hair-thin wires and holding them in place to solder. I have to solder while looking thru a magnifier.
Attached Thumbnails
Click image for larger version

Name:	Board repair.jpg
Views:	115
Size:	103.9 KB
ID:	129867  
__________________
Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
Reply With Quote
Sponsored Links
Advertisement
 
  #2  
Old September 16th, 2015, 09:12 AM
Nomar's Avatar
Nomar
Status: Offline
Jeff B
RR HNTR,RR LWB Tdi
Member
 
Join Date: Aug 2004
Location: Central,Virginia
Posts: 4,291
Registry
nice job.


.
__________________


Real Rovers have round headlights!
Rent my
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
!
Just a few miles from 4x4 access!
Reply With Quote
  #3  
Old September 16th, 2015, 09:17 AM
Uncle Douglas's Avatar
Uncle Douglas
Status: Offline
Doug Crowther
A defender in every driveway-motto
D-90 Source Vendor
 
Join Date: Dec 2007
Location: Gods Country- Central Virginia
Posts: 11,841
Registry
Wow. Mine looks better than that. Maybe there is hope after all.
__________________
Good judgement comes from experience,experience comes from bad judgement.

Dividing Creek Imports
Worldwide Vehicle Shipment and Importation Service
Restoration & Modification work


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

410.693.1391


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
Sponsored Links
Advertisement
 
  #4  
Old September 16th, 2015, 09:44 AM
o2batsea's Avatar
o2batsea
Status: Online
Bill Adams
66 109 sw 94 lwb
Member
 
Join Date: Jul 2009
Location: kensington md
Posts: 6,505
Registry
Send it on up Mr C.
One thing that eats the traces is the corrosive acid which somehow finds a way under the green conformal coating. The coating has to be carefully removed and the acidy area neutralized so it doesn't get any worse. Then you can repair the breaks and recoat.
__________________
Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
Reply With Quote
  #5  
Old September 16th, 2015, 09:51 AM
rijosho's Avatar
rijosho
Status: Offline
Joshua
1995 Black ST - Rhinolined edition
Research Assistant/Eagle Eyes
 
Join Date: Apr 2009
Location: NYC
Posts: 16,557
Registry
I'm assuming that's all copper, including the wider flat strips?
__________________
Quote:
I am talking purely from an aesthetics standpoint.
Reply With Quote
  #6  
Old September 16th, 2015, 09:53 AM
JimC's Avatar
JimC
Status: Offline
Jim Cheney
NAS 110 #145
Site Team
 
Join Date: Sep 2003
Location: Stuttgart, Germany
Posts: 7,154
Registry
This is fascinating. Why repair in this case? The challenge?
__________________
Jim Cheney

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #7  
Old September 16th, 2015, 09:58 AM
Nomar's Avatar
Nomar
Status: Offline
Jeff B
RR HNTR,RR LWB Tdi
Member
 
Join Date: Aug 2004
Location: Central,Virginia
Posts: 4,291
Registry
Quote:
Originally Posted by JimC View Post
This is fascinating. Why repair in this case? The challenge?
Because these ecu boxes are unobtanium.
You lose drivers' seat function and control of the mirrors when the ecu fails.


.
__________________


Real Rovers have round headlights!
Rent my
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
!
Just a few miles from 4x4 access!
Reply With Quote
  #8  
Old September 16th, 2015, 10:18 AM
ezzzzzzz
Status: Offline
Mark Garrenton
Too many here or gone to list here
Member
 
Join Date: Jun 2004
Location: Portsmouth Virginia
Posts: 758
Very cool, Bill. Most of my youth was spent repairing circuit boards for various electronics on navy ships and subs. I have a few of these ecu's in storage. maybe I'll look to fix a couple and provide for a nominal fee to those desiring one. Other than the memory function I see no use in this overly complicated ecu. All of the basic functions could be bypassed IMHO. I think some have done this very thing. I'm putting older vogue mechanical seats into my '90 rrc. The mirrors will be fused and maybe a simple load relay for operation.
Reply With Quote
  #9  
Old September 16th, 2015, 10:47 AM
Uncle Douglas's Avatar
Uncle Douglas
Status: Offline
Doug Crowther
A defender in every driveway-motto
D-90 Source Vendor
 
Join Date: Dec 2007
Location: Gods Country- Central Virginia
Posts: 11,841
Registry
Quote:
Originally Posted by Nomar View Post
Because these ecu boxes are unobtanium.
You lose drivers' seat function and control of the mirrors when the ecu fails.


.
Unless you live near Doc Nomar, he can rig ya up with a non memory seat switch and some adapter wiring and regain @ least the seat functions.
__________________
Good judgement comes from experience,experience comes from bad judgement.

Dividing Creek Imports
Worldwide Vehicle Shipment and Importation Service
Restoration & Modification work


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

410.693.1391


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #10  
Old September 16th, 2015, 10:51 AM
Contractor's Avatar
Contractor
Status: Offline
Will
1969 IIA
Member
 
Join Date: Aug 2013
Location: The South
Posts: 560
Quote:
Originally Posted by Uncle Douglas View Post
Unless you live near Doc Nomar, he can rig ya up with a non memory seat switch and some adapter wiring and regain @ least the seat functions.



I need this, who can provide it?
Reply With Quote
  #11  
Old September 16th, 2015, 10:51 AM
Uncle Douglas's Avatar
Uncle Douglas
Status: Offline
Doug Crowther
A defender in every driveway-motto
D-90 Source Vendor
 
Join Date: Dec 2007
Location: Gods Country- Central Virginia
Posts: 11,841
Registry
Quote:
Originally Posted by o2batsea View Post
Send it on up Mr C.
One thing that eats the traces is the corrosive acid which somehow finds a way under the green conformal coating. The coating has to be carefully removed and the acidy area neutralized so it doesn't get any worse. Then you can repair the breaks and recoat.
Do you have a source for a replacement battery ? I know Joel found some and I haven't asked or even looked but batteries have come a long way since 1994.
__________________
Good judgement comes from experience,experience comes from bad judgement.

Dividing Creek Imports
Worldwide Vehicle Shipment and Importation Service
Restoration & Modification work


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

410.693.1391


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #12  
Old September 16th, 2015, 12:43 PM
Overlander's Avatar
Overlander
Status: Offline
mark kellgren
in between D's in an 04 D2
Member
 
Join Date: Mar 2006
Location: Charlotte, NC
Posts: 6,531
Registry
Quote:
Originally Posted by Uncle Douglas View Post

Do you have a source for a replacement battery ? I know Joel found some and I haven't asked or even looked but batteries have come a long way since 1994.
There's a uk sell on ebay that sells the battery and separately the chip and most commonly failed parts on the RRC ecu. We just went through that. Greenbull used same seller and repaired his.
__________________
Mark Kellgren
KM4BOR

ISIL and al qaeda can go F*ck themselves...
Reply With Quote
  #13  
Old September 16th, 2015, 12:48 PM
Kevin88RRC's Avatar
Kevin88RRC
Status: Offline
Kevin Keith
1988 RRC
Member
 
Join Date: Dec 2014
Location: Portland, Maine
Posts: 1,045
Couldn't you splice in part of a harness from an earlier RRC and just lose the memory function?
Reply With Quote
  #14  
Old September 16th, 2015, 01:03 PM
Uncle Douglas's Avatar
Uncle Douglas
Status: Offline
Doug Crowther
A defender in every driveway-motto
D-90 Source Vendor
 
Join Date: Dec 2007
Location: Gods Country- Central Virginia
Posts: 11,841
Registry
Quote:
Originally Posted by Kevin88RRC View Post
Couldn't you splice in part of a harness from an earlier RRC and just lose the memory function?
That's what Jeff/Nomar did for me. We took some harness out of an 89 parts truck I have and he made something that plugged into the existing harness and the seat now works, but no mirrors.
__________________
Good judgement comes from experience,experience comes from bad judgement.

Dividing Creek Imports
Worldwide Vehicle Shipment and Importation Service
Restoration & Modification work


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

410.693.1391


To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Reply With Quote
  #15  
Old September 16th, 2015, 03:06 PM
o2batsea's Avatar
o2batsea
Status: Online
Bill Adams
66 109 sw 94 lwb
Member
 
Join Date: Jul 2009
Location: kensington md
Posts: 6,505
Registry
Doug they are very common batteries. I got them from Mouser. The only custom bit is the memory chip. Everything else is off the shelf electronics parts available from a gazillion sources. That said, usually the only thing that gets messed up are the capacitors that are in the battery's neighborhood.

------ Follow up post added September 16th, 2015 03:11 PM ------

Quote:
Originally Posted by ezzzzzzz View Post
Very cool, Bill. Most of my youth was spent repairing circuit boards for various electronics on navy ships and subs. I have a few of these ecu's in storage. maybe I'll look to fix a couple and provide for a nominal fee to those desiring one. Other than the memory function I see no use in this overly complicated ecu. All of the basic functions could be bypassed IMHO. I think some have done this very thing. I'm putting older vogue mechanical seats into my '90 rrc. The mirrors will be fused and maybe a simple load relay for operation.
The problems are specifically related to the two position memory seats and not the non memory seats. I think they are 93-95 LWB specific, but probably were also on any County model from that time frame.
You can swap out the memory ECU for a non memory ECU, along with a non memory mirror switch and be OK....I think.
__________________
Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
Reply With Quote
  #16  
Old September 16th, 2015, 04:11 PM
LRover's Avatar
LRover
Status: Offline
J. Michael McCaig
D90 ST, LR110, Series IIa, RRC
Member
 
Join Date: Oct 2003
Location: VA
Posts: 479
Very cool. I didn't know the ecu was repairable.

Out of frustration I rewired my seat using an earlier RRC switch. If you use a Disco I mirror switch, you can get the mirrors to work. The mirror switch looks the same as the Disco switch but it is different. For some reason the rear wiper switch in my '95 lwb is on the same circuit as the ecu and I had to get power to the relay but everything works now.
Reply With Quote
  #17  
Old September 16th, 2015, 04:31 PM
evilfij's Avatar
evilfij
Status: Offline
evilfij
I have never seen a rover in person
Member
 
Join Date: Oct 2003
Location: on the internet
Posts: 14,688
I fixed mine with just a battery. Anyone with any of these trucks should replace the battery as a precaution and repeat every ten years.
__________________
*not legal advice*
Reply With Quote
  #18  
Old September 29th, 2015, 08:16 AM
o2batsea's Avatar
o2batsea
Status: Online
Bill Adams
66 109 sw 94 lwb
Member
 
Join Date: Jul 2009
Location: kensington md
Posts: 6,505
Registry
OK tested the repaired board last night. Had to undo my own front seat (!!!!) to access the connectors so I could plug it in to the LWB wiring. 99 percent success. Well, maybe not exactly 99%. Memory function in both setting 1 and 2, and the seat motors and mirrors function properly. The relays for the seat back recline function operate (board is out of the case so I can see them clicking open and closed) but the seat back is not reclining. Well, actually it did for a couple of tries then stopped. I suspect this one relay on the board is faulty so I'm going to replace it and retest this evening.
Those relays are a HUGE PAIN IN THE ASS to desolder and remove without ruining the trace on the top surface of the PC card. They are a big hunk of copper so they soak up all the heat from your iron, making it difficult to get all the old solder out. Even my big Weller iron is having some difficulty, and the solder wick is not soaking up the wet solder. Then there is a very slight amount left topside that you just can't reach.....
__________________
Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
Reply With Quote
  #19  
Old September 30th, 2015, 06:12 PM
o2batsea's Avatar
o2batsea
Status: Online
Bill Adams
66 109 sw 94 lwb
Member
 
Join Date: Jul 2009
Location: kensington md
Posts: 6,505
Registry
Swapped out bad relay. Everything tested out 100% completely functional . Considering that these things are super rare in operating condition, ol Dread got himself a smoking deal on a working unit. But I'm in it for the love not the money....
Dunno if it would be considered upgrades but two things I did that help is put in a 150 mA battery instead of the 100, and install the new integrated circuits with socket plugs instead of direct to the card.
__________________
Bill Adams

1966 109 5 door wagon 300Tdi "spermaceti fueled"
1994 RRC LeWiB "ruining the air behind me"
1968 2A 88

All my troubles are Rover
Reply With Quote
  #20  
Old September 30th, 2015, 06:50 PM
drdread's Avatar
drdread
Status: Offline
AL
'94 NAS 90 SW
Member
 
Join Date: Mar 2007
Location: Southern NY & North Miami
Posts: 531
Registry
Wow, I missed all the progress and pictures. Feel a little famous now. Thanks Bill. U R D MAN!

FYI, I hope you're in the mood for some more love, because I'm referring like 6 guys to you with probably the same problem

Thanks again man
__________________
1994 Silver DEFENDER 90 NAS SW
Reply With Quote
Reply

Lower Navigation
Go Back   Defender Source > Build-up's, Projects & Registry Profiles > Smaller Projects

Tags
ecu

Thread Tools

Posting Rules
You may not post new threads
You may not 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 Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
2 4.2 ECU's 1 3.9 ECU eliaschristeas For Sale - Parts 3 June 19th, 2013 03:15 PM
Need an ECU... looking for the ECU out of a 95 Disco or equivalent IPSC_GUY Wanted 7 February 16th, 2010 04:36 PM
BesTop Repairs? boshea Wanted 3 January 3rd, 2004 12:17 AM
BesTop Repairs? boshea Defender Technical Discussions 3 December 29th, 2003 10:22 PM


All times are GMT -5. The time now is 04:04 PM.


Copyright