« previous next »
Pages: [1] 2

Author Topic: Abs  (Read 585 times)

Offline apcollins

  • Jr. Member
  • **
  • Posts: 61
    • Email
Abs
« on: September 13, 2009, 03:07:14 PM »
my ABS light is on, got it scanned at The 4x4 Center and they said not codes... probably a bad ABS computer.

anyone know where i could find one of these for less than the $1,100 Rover wants for it?
Logged

Offline cellulararrest

  • Administrator
  • Hero Member
  • *****
  • Posts: 1114
    • Email
Abs
« Reply #1 on: September 13, 2009, 06:16:34 PM »
No idea if it's anything like a RRC, but you can do a "blink code" diagnosis on an RRC. It will tell you exactly where the problem lies. The ABS computer is separate. They might have combined them in the OBD2 system though.

Give a check on discoweb or the workshop manual.
Logged
SNHLR Webmaster

Offline SafeAirOne

  • Full Member
  • ***
  • Posts: 180
    • Zuni Racks
    • Email
Abs
« Reply #2 on: September 14, 2009, 01:42:55 AM »
Quote from: apcollins;18673
... a bad ABS computer.  anyone know where i could find one of these for less than the $1,100 Rover wants for it?

Junkyards are full of discoverys.  That'd be my first place to look.
Logged
--Mark

Offline Daniel

  • Hero Member
  • *****
  • Posts: 1280
    • http://www.x-trememarine.com
    • Email
Abs
« Reply #3 on: September 14, 2009, 07:17:04 AM »
I've got a 97 SE7 at the house as a truggy. No computers needed. Tell me whrere it is and I'll pull it and ship it to you for price of shipping. If it works, and it's what you need, make an offer later after you're safe to drive.
Logged
2002 LR DII SE Kalahari Edition. 4.6, locking CDL, and Detroits.
1994 LR RRC LWB. EAS conversion w/ +2" springs.
1968 LR SIIA 88" Hybrid, with 109" 1 ton axles SOA. Needs Tartis for completion.

1979 LR SIII 5 door 109 SW, 11 seater. Sold, 09'.
1997 Disco I Bobtailed buggy conversion. Sold, 11'.

Offline apcollins

  • Jr. Member
  • **
  • Posts: 61
    • Email
Abs
« Reply #4 on: September 14, 2009, 03:46:15 PM »
That could be great... I'll do some research as to where it is and what it looks like.
Logged

Offline apcollins

  • Jr. Member
  • **
  • Posts: 61
    • Email
Abs
« Reply #5 on: September 16, 2009, 07:17:10 PM »
looks like the ABS ECU is located behind the glovebox... and the modulator has eight tubes running from it (two per wheel)

anyone ever remove either of those?  looks like some trouble...


how hard are these trucks to manage without ABS? haha
Logged

Offline Daniel

  • Hero Member
  • *****
  • Posts: 1280
    • http://www.x-trememarine.com
    • Email
Abs
« Reply #6 on: September 16, 2009, 08:48:24 PM »
The ABS ecu should be easy to pull. The glovebox and most of the dash are already out in the truggy. The modulator I believe is on the drivers side inner fenderwell on these trucks. If you need that too, I don't, or won't as this will be a rock crawler only. I'm off on fridays, so I can pull up what info I can on the Rave CD and start pulling parts if you still need me too.
Logged
2002 LR DII SE Kalahari Edition. 4.6, locking CDL, and Detroits.
1994 LR RRC LWB. EAS conversion w/ +2" springs.
1968 LR SIIA 88" Hybrid, with 109" 1 ton axles SOA. Needs Tartis for completion.

1979 LR SIII 5 door 109 SW, 11 seater. Sold, 09'.
1997 Disco I Bobtailed buggy conversion. Sold, 11'.

Offline apcollins

  • Jr. Member
  • **
  • Posts: 61
    • Email
Abs
« Reply #7 on: September 16, 2009, 10:33:50 PM »
That's awfully nice of you but I'm not sure I want to make you do it, as I don't know when I'd have a chance to install it...

According to RAVE the modulator is very fragile and "isn't to be used after opening" or something like that... I'll look into it further.
Logged

Offline Daniel

  • Hero Member
  • *****
  • Posts: 1280
    • http://www.x-trememarine.com
    • Email
Abs
« Reply #8 on: September 19, 2009, 08:18:35 AM »
Andrew; How has your research come along?
Logged
2002 LR DII SE Kalahari Edition. 4.6, locking CDL, and Detroits.
1994 LR RRC LWB. EAS conversion w/ +2" springs.
1968 LR SIIA 88" Hybrid, with 109" 1 ton axles SOA. Needs Tartis for completion.

1979 LR SIII 5 door 109 SW, 11 seater. Sold, 09'.
1997 Disco I Bobtailed buggy conversion. Sold, 11'.

Offline apcollins

  • Jr. Member
  • **
  • Posts: 61
    • Email
Abs
« Reply #9 on: September 21, 2009, 01:13:48 PM »
RAVE has shown me where the ABS ECU and modulator are... (I could post a JPEG)

I've tried to figure out if there's any way to test the modulator without pulling it... I'm not sure if I'd have to bleed the brakes or do anything else before I pull the 8 tubes running from it.

I can't really put my ear next to it while i'm braking, but I might be able to figure something out.

As for the ECU, I'm (again) not sure if i can access it without taking the entire dash off- which I don't want to do because I'm sure I'll break a whole heap of little plastic pieces.

can an ECU really just "go bad" anyway?
Logged

Offline Daniel

  • Hero Member
  • *****
  • Posts: 1280
    • http://www.x-trememarine.com
    • Email
Abs
« Reply #10 on: September 21, 2009, 01:24:27 PM »
Considering the age of your truck; it's not really "just" going bad. I've had Trans ecu's and SRS ecu's go bad after off-roading from water damage. It really depends on use and location of the ecu. If you've got the pics of location, I'll pull my ecu for you, and see if that helps at all before pulling the big part that may or may not work after opening.
Logged
2002 LR DII SE Kalahari Edition. 4.6, locking CDL, and Detroits.
1994 LR RRC LWB. EAS conversion w/ +2" springs.
1968 LR SIIA 88" Hybrid, with 109" 1 ton axles SOA. Needs Tartis for completion.

1979 LR SIII 5 door 109 SW, 11 seater. Sold, 09'.
1997 Disco I Bobtailed buggy conversion. Sold, 11'.

Offline apcollins

  • Jr. Member
  • **
  • Posts: 61
    • Email
Abs
« Reply #11 on: September 21, 2009, 01:27:06 PM »
sounds good... i'll find the diagram and try to take a photo too
Logged

Offline Daniel

  • Hero Member
  • *****
  • Posts: 1280
    • http://www.x-trememarine.com
    • Email
Abs
« Reply #12 on: September 21, 2009, 01:32:23 PM »
Should be able to pull and ship on Friday unless it's a rush - then I'll ship from work. My glovebox and some vents are already out, as I'm planning on putting a cage in, so pulling it, even behind dash shouldn't be a big deal.
Logged
2002 LR DII SE Kalahari Edition. 4.6, locking CDL, and Detroits.
1994 LR RRC LWB. EAS conversion w/ +2" springs.
1968 LR SIIA 88" Hybrid, with 109" 1 ton axles SOA. Needs Tartis for completion.

1979 LR SIII 5 door 109 SW, 11 seater. Sold, 09'.
1997 Disco I Bobtailed buggy conversion. Sold, 11'.

Offline apcollins

  • Jr. Member
  • **
  • Posts: 61
    • Email
Abs
« Reply #13 on: September 28, 2009, 05:51:27 PM »
ok- here's the locations of the items, and what RAVE says about the modulator and ECU...

I still don't know how hard it would be for me to replace that modulator, but maybe i could pay somebody to swap it out.  or try the ECU thing, which seems decidedly easier to replace.

There's also the factor of the ABS sensors on the wheels which it seems could also be the problem... but i would have thought that would throw a code
Logged

Offline grobinson

  • Posts: 151
    • Email
Abs
« Reply #14 on: October 06, 2009, 07:40:10 PM »
Pull the glove box compartment out, which is really incredibly easy to do, and you'll have access to the ABS ECU unit.  Pull the large plug from the abs ecu, and be done with your ABS troubles.  If you don't want to see the light, I believe you can just pull the ABS relay, but you can also just pull the bulb from the dash.

Most likely you're getting the ABS light because of a bad sensor, or the sensor is knock out of place.  Although, of course it could be more than that, but it's been more so one of the ABS sensors.  I eventually did away with ABS, and was happy to do so.  It was so unpredictable.

Follow up post:

BTW, big plug I'm referring to is #5 on your second diagram.
Logged
-Gavin
'97 TJ fully locked, 35s, OBA, Atlas, etc...
http://www.VTXS.org
Pages: [1] 2
« previous next »