95 ABS Pump in a 93FD
 

Any one ever installed a 95ABS pump in a 93 FD?
Does anyone have a 95 factory service manual that can scan the ABS section for me?

My 93 ABS is leaking badly

I'm VERY interested in this as well. In the middle of my build, I decided to rip out all the brake lines and replace everything new. I found out from Ray that you can't buy all the brake lines new anymore---but the ones that were available are not bent the same...close but not usable. This leads me to believe that the 95 ABS unit is not the same as the 93 unit and since you can't buy the 93 unit new anymore, you have to go with the 95. Not sure how many of the brake lines are different, if the 93 ABS computer will work with the 95 ABS module, etc.....

The 95 ABS pump will work just need to change the wiring pin outs to match the 93 pin outs.

I need a copy of the 95 FSM ABS page.

Perhaps rynberg could help us out---he mentioned in the 3rd gen FAQ that he has copies of both the 94 & 95 manuals...

On a side note: are you confirming that the fitment is the same for the 95 unit (other than the electrical connector)? Interested mainly in the brake lines....

Have you checked here: http://www.wankel.net/~krwright/file...parts_manuals/ ?

Thanks Mahjik, but those are just parts diagrams.
I've looked all over for a 95 FSM (I'm sure powermalex has too), and there are plenty of sites with part diagrams, but none with the FSM or electrical diagrams. Apparently the electrical connectors are different but I can't confirm this (I haven't orderd the 95 ABS unit yet and won't until I know what the differences are).

FYI the part numbers for the ABS unit are:

1993: FD04-43-780E & FD04-43-780F
1994: FD04-43-780F (same as 1993 update)
1995: FD31-43-780C & FD31-43-780D (clearly a major update based on P/N)

If that were true, the wiring harnesses would need to be different between the years but I don't believe that is the case. The harness is different, but that has to do with the coolant fan recall which was integrated into the 94+ harness (rather than the addon harness used on 93's). Even so, you would need the wiring diagram for a '95 not the FSM to verify that.

The 93 FSM I have has the electrical diagrams for the vehicle...I would assume that this is the case with the 94 & 95 (although I have seen a separate body electrical diagram for 94). In either case what we need are the electrical diagrams---no offense but I'm looking for hard facts, not speculation.

The wiring is separate from the FSM (even with the 93). You can purchase them together, but they are separate. I would start with comparing the body electrical ABS sections for the 93's and 94's. If they are the same, see if you can track down the '95 body electrical. I'm sure Jimlab has one laying around which he may be able to scan in the particular pages you'll need.

Actually already done that....1993 & 1994 pin outs are the same which makes sense since I can confirm that a 1994 ABS unit fits in the 1993 with no problems at all. The pin outs for the ABS are indeed listed in FSM for 1993 (P-52), and the body electrical diagrams for 1994 (Z-106)---this is all that's needed for the 95 as well.

Hence we're back to powermalex's first post: does anybody have the 95 diagrams?

I don't PM anybody anymore with requests for information like this, because I'm ignored 99% of the time....I'm guessing because I'm not well known on this forum and don't post that often.

You are going to have a better chance of PM'ing someone like Jimlab or rynberg than waiting for them (or someone else) who may have the wiring diagrams to read this thread. Jimlab for instance rarely reads this section anymore.

If the 94 matches, I would bet the 95 will as well. Just because the P/N is different, doesn't automatically mean the interface was changed. There are quite few 93 parts which are now superseded by 94/95 parts. However, as you mentioned, you are looking for proof but I would be extremely surprised if Mazda changed the wiring.

I would be surprised if the 95 is different as well, however powermaxel noted in his first post that this is indeed the case. And the fact that the 95 brake lines that I ordered don't match up to the 93/94 module I would have to assume that they are different as well.

I'll PM rynberg first....Jimlab always seems grouchy :) .

May be entirely coincidental, have the ABS light permanently illuminated running a 92 pump and 95 ECU, which may be fixed once I get around to installing the later pump. From what I gather, changeover occurred 7/94, but don't know how that translates into your system over there.

Here's a shot of early(left) and later ECU, pin density is quite different....

http://img253.imageshack.us/img253/4...3sj4bx4.th.jpg

Thanks for the reply billyboy.
Hmmm...that's what I was afraid of---the computer AND module are different. Even though you have RHD I would assume that they shared most of the components with the US cars through 95. Only one way to be sure though....

There were several revisions of the ABS system over the years, the first of which happened mid-'93, again for the start of the '94 models, and again for '95. The 3-channel system was revised for the final time in '96, from what I understand. 4-channel ABS was introduced in '99.

In the 1993 chassis parts manual schematic below, you can see that PN FD04-43-7A0 is the ABS hydraulic unit. Someone correct me if I'm wrong, but I believe it indicates that FD04-43-7A0C was replaced with FD04-43-7A0D, which would correspond to the mid-year change.

https://www.rx7club.com/attachment.p...1&d=1212379224

This page from the 1994 chassis parts manual shows a different part number (FD04-43-780F) for the 1994 hydraulic unit (but essentially the same illustration as 1993). I have no idea what the suffix F means.

https://www.rx7club.com/attachment.p...1&d=1212379224

The 1995 chassis parts manual page shows the obvious difference in the last ABS hydraulic unit which most U.S.-bound FDs received. Part number is FD31-43-7A0B, replacing FD31-43-7A0A, I believe. I don't know if 'B' corresponds to the '96 change or not, but it would be odd that two part numbers are listed in the '95 manual otherwise.

https://www.rx7club.com/attachment.p...1&d=1212379224

And finally, here are a couple close-ups of a (possibly) 1996 hydraulic unit. My car was imported in January of 1997, and apparently updated with the 1996 hydraulic unit, although I haven't been able to definitively document that beyond other '95 owners telling me theirs doesn't look exactly like mine.

https://www.rx7club.com/attachment.p...1&d=1212379224

https://www.rx7club.com/attachment.p...1&d=1212379224

Thanks Jimlab. Any chance you could please scan the electrical diagrams for the 95 ABS?

I'll take a look tonight and see what I can do.

Going from Jimlab's pics, the pumps are different, although looks like they share the same "upgrade" on mounts, going from cast alloy to stamped steel. Prefix over here is F100 on the early pumps to F123 on the later. Control box went FD01-67-650 to FD31-67-650.... imagine they didn't have to swap them over to the other side and change them too though.

Pardon the image quality, I had to shoot them with a digital camera.

https://www.rx7club.com/attachment.p...1&d=1212466264

https://www.rx7club.com/attachment.p...1&d=1212466264

Does he seem grouchy now? ;)

Not at all. Thanks Jimlab!

:icon_tup:

I can be grouchy if he wants. :)

No problem.

ZOMBIE THREAD!!!

Just bringing this one back to add that I've recently tried to make a '95 ABS unit work in a '94.

Take a peek at what I found. . .

94 Schematic

95 Schematic

and the Mazda Factory Manual:

95 Factory Wiring Diagram

Both show that the solenoid valve relay on the '95 has changed to a simpler version which instead of grounding the (+) side of the solenoids when open (off) just opens. While there is the same number of pins in each, the '94 uses a common (+) for all three solenoids & the ABS controller in the trunk sends a (-) signal to fire the solenoids. On the '95 each solenoid has a pair of inputs from the controller. Maybe someone else can shed some light on this, but it appears to me that the '95 unit may not function correctly w/o a '95 ABS controller + some modifications to the harness. . .