GalantVR4.org The Mitsubishi Galant VR-4 Forum
NOTICE: This forum is for archiving information and discussions. Please do not reply to threads unless you have valuable information to add. Do not post questions or problems here.

Galant VR-4 Forums » Galant VR-4 » How To and Info Archive » Functional ABS with a 5 Lug Swap
Previous thread Next thread

Functional ABS with a 5 Lug Swap


tommyp
Junior Member
1410/2000


Galant VR-4 org Post #: 683394 posted 08/18/08 07:20 PM     Remind Me!  Send Private Message   Edit Post      
Do this at your own risk. This works for me.

Unlike some people, I prefer ABS. I have to admit, I'm not the best driver. Sometimes it's difficult to remember to pump my brake pedal when on a snowy hill and my car is out of control and just about ready to hit a tree. I wanted my 5 lug, 4 bolt LSD GVR4 to have ABS.

I read on this forum that you can't have a 5 lug swap and functional ABS and quite honestly, I didn't believe it. The cause is that the ABS tooth count on the hubs do not match what the ABS ECU is expecting. The stockers are 96/48 and the 5 lug are 48/48. A contributing factor to non-functional ABS is the 1991 ABS electronics system is inferior to that of the 1991 as Mitsu didn't perfect it at the time.

I refreshed my brain on LSD rears and ABS by reading up in the old DSM archives. I'm sure that the old timers remember them. Apparently there were some issues with 1990s and 1991s with ABS. Mitsu never got it right. Starting in 1992, Mitsu found the recipe for a functional ABS when running an LSD.

Lucky for me, when rebuilding my GVR4, I picked up the parts for a 5 lug swap from a 1992 DSM. The parts included the 4 bolt LSD rear, rear subframe, rear 5 lug hubs, and front 5 lug hubs. At the time, I wasn't sure if it was needed or not, so I picked up the ABS ECU from the same donor car. Luckily for me, I had the ABS ECU because I had done my electronic research after I had all the parts.

Tools needed
Drill
Drill bit
Philips screwdriver
Small screwdriver
Electrical tape
Flashlight


The Procedure:
1) If not done so already, do the 5 lug swap and make sure that you have all the ABS speed sensors connected to the car harness.

2) Open the trunk and open the access area for the jack. Remove the jack. Remove side carpeting as to give you access to the ABS ECU.

3) Unplug the ABS ECU.

4) Remove the ABS ECU mounting bracket fom the car chassis. It may be necessary to move the carpet aside to access the bottom screw. Remove the ABS ECU from the case. We will use the ABS case to mount the new ABS ECU. Notice how the ECU has the ABS speed sensor tooth count printed right on the connector?


5) Insert the 1992 ABS ECU into the old case. Mark where holes are needed and drill some holes for screws. Install the 1992 ABS ECU into the stocker case and secure it with some screws/nuts/washers. Refer to picture for orientation. Notice how the ECU has the ABS speed sensor tooth count printed right on the connector?



6) Install the ECU back into the car. Use the old mounting hardware.


7) Remove the philips screw on the ABS connector. Remove the electrical tape at the back of the connector. Slide the hood of the connector off the main connector body. Remove the two side plastic retainers and place aside.

8) The hard part - the wire swaps. I had difficulty in removing pins. There is probably a better method, but I haven't quite found it and quite honestly I don't really care. I ended up using a small nail and sticking it next to the crimp contact and the connector body to force the contact retainer loose. Once the contact is out, install it into the correct spot. Here is the cheat sheet for a 92 DSM ABS ECU.

Move pin 3 to pin 6 (Blue/Black wire). Resultant pin 3 should be empty.
Move pin 21 to pin 22 (Green/Yellow). Resultant pin 21 should be empty.
Move pin 32 to pin 14 (ABS sensor lead). Resultant pin 32 should be empty.
Remove pin 20 and tape it up. It is not required.

Do not let the numbers marked on the connector fool you! The numbers molded into the connector do not properly reflect what is in the car schematic! See photos of what pin number is where.



9) Place the side plastic retainers back in. The side retainers will hold the contacts from backing out. Install the connector hood and philips screw. Put some fresh electrical tape on the bottom of the connector.

10) Connect the harness to the 1992 ABS ECU. Notice both the ABS tooth count and the #18 pin identifier are proudly displayed.


11) Put the rest of the carpeting back together and put the jack back.

12) Done!

If there is a need/demand, I can expand the wire swap cheat sheet with other year ABS ECUs.

Posts: 70 | From: Sussex County, NJ | Member Since: 10/27/07 | IP: (70.15.153.203) | Report this post to a Moderator

iceman69510 Galant VR4.org Moderator
Turn Right Racing
855/2000


Galant VR-4 org Post #: 683630 posted 08/19/08 10:37 AM     Remind Me!  Send Private Message   Edit Post      
I know Tommy prominently points out the 96/48 sticker on the unit, but just to be clear, the actual rotor tooth count on a 91 GVR4 is 86F/43R. The tooth count on a 92 is 43F/43R.

The tooth count for all AWD 1gs (91-94) is 47F/47R. Key point is the 2:1 ratio on '91 GVR4 and 1:1 on TEL and '92 GVR4.

The same controller he mentions to use is available from the 92 GVR4 and also available from any 91-94 TEL with ABS.

You want part number MB686563 (Bosch number 120 000 F0012). This applies to 91 D27s and 92 GVR4s. You should also be able to use MB903852 (Bosch number 120 000 F011) because it supercedes to MB686563 anyway. This was used in 92-94 1gs.

Kudos Tommy. I had this same idea for my 91 but never got it trialed.

How is the performance? My only concern is that hydraulic units are different also.



91 VR4 855 Nile Black
92 VR4 828 Belize Green-SOLD
91 VR4 115 Nile Black -SOLD


Edited by iceman69510 (08/19/08 12:45 PM)

Posts: 10589 | From: Michigan | Member Since: 03/05/01 | IP: (12.1.210.225) | Report this post to a Moderator

tommyp
Junior Member
1410/2000


Galant VR-4 org Post #: 683907 posted 08/19/08 07:17 PM     Remind Me!  Send Private Message   Edit Post      
Iceman - Thanks for the clarification on tooth counts, but I echo your point that the tooth count is 2:1 on a gvr4 and a 1:1 on a dsm. I have not had any issues with ABS functionality at this point. When I first start it, the ABS light goes on and off a number of times and then goes out, which seems to make sense that it's the self test that it does at powerup. I suppose once winter sets in, I'll be able to test breaking power more frequently.

Posts: 70 | From: Sussex County, NJ | Member Since: 10/27/07 | IP: (70.15.153.203) | Report this post to a Moderator

Gvr4-330
I feel of the short bus
330/2000


Galant VR-4 org Post #: 926944 posted 08/31/10 11:28 PM     Remind Me!  Send Private Message   Edit Post      
I know this is an old thread, but I had some more information.

The reason why the ABS was so sucky on the 90-91 DSMs (and why it was not available with an LSD) was because the ABS system was a two-channel system. So one front wheel and the opposite rear wheel would be tied into each other. And when you had the LSD, it would mess it up.

I thought I had read that on the 92+ DSMs, Mitsubishi began using a 3-channel ABS system. If this is the case, the hydraulics probably need to be upgraded to get the full functionality of the 3-channel system.

Rob



1991 VR-4 # 330/2000
1991 VR-4 #1061/2000 - SOLD

Posts: 1543 | From: DC | Member Since: 12/30/01 | IP: (98.163.107.127) | Report this post to a Moderator

iceman69510 Galant VR4.org Moderator
Turn Right Racing
855/2000


Galant VR-4 org Post #: 928923 posted 09/07/10 10:40 PM     Remind Me!  Send Private Message   Edit Post      
After reviewing the service manuals, I have to disagree. The FWD cars have a three -channel system, but all model years of the 1g AWD have a two-channel system shown.

ABS+LSD+AWD was only not available in 1990 models IIRC. Was optional on 91s and later.



91 VR4 855 Nile Black
92 VR4 828 Belize Green-SOLD
91 VR4 115 Nile Black -SOLD

Posts: 10589 | From: Michigan | Member Since: 03/05/01 | IP: (74.44.220.62) | Report this post to a Moderator

iceman69510 Galant VR4.org Moderator
Turn Right Racing
855/2000


Galant VR-4 org Post #: 970422 posted 02/16/11 10:11 PM     Remind Me!  Send Private Message   Edit Post      
I realized seeing another post tonight, that I can provide an update for 92 MY GVR4s.

I converted my 92 to five lug, and as noted in a previous post here, 92s run 43F/43R on the tooth count. Using 1g parts which are 47F/47R keeps the 1:1 ratio and leaves the ABS completely functional. You must of course have the 47 tooth rear sensor rotor from the 1g and not reuse the GVR4 part, and utilize the stock front 47 tooth rotors that comes on the 1g knuckle and hub.

I had long postulated this was the case, and just wanted to confirm this. I have had no problems at all with it since completing the swap and driving now about 700 miles.



91 VR4 855 Nile Black
92 VR4 828 Belize Green-SOLD
91 VR4 115 Nile Black -SOLD

Posts: 10589 | From: Michigan | Member Since: 03/05/01 | IP: (74.44.219.42) | Report this post to a Moderator

alansupra94
Excuse the retarded question.
4/1000


Galant VR-4 org Post #: 1062991 posted 04/18/12 09:03 AM     Remind Me!  Send Private Message   Edit Post   
How do you like the ABS system? Was it worth it for you?



1992 Galant VR4
1996 Toyota Supra TT

Posts: 1908 | From: Wayne,NJ | Member Since: 03/03/10 | IP: (192.132.228.1) | Report this post to a Moderator


Pages: 1
Previous thread Next thread

Extra information
0 registered and 1 anonymous users are browsing this forum.

Galant VR4.org Moderator:  curtis, steve, atc250r, jcgalntvr4-244, cheekychimp, jepherz, Rausch, toybreaker, iceman69510, pot, FlyingEagle 

Print Thread

Forum Permissions
      You cannot start new topics
      You cannot reply to topics
      HTML is disabled
      UBBCode is enabled

Rating:
Thread views: 12099

Rate this thread


News & Events: News | Events
Galant VR-4: Newbies | General VR4 Discussions | Technical Discussions | How To and Info Archive
Marketplace: Parts For Sale | Cars For Sale | Good Guys | Bad Guys
Community: Members' Showcase

Contact Us | Privacy statement GalantVR-4.org

Generated in 0.078 seconds in which 0.031 seconds were spent on a total of 14 queries. Turbo powered.



Hertz's Galant VR-4 Page